Quick Facts About Saint Barthélemy
General Information
- Main town: Gustavia
- Status: French overseas collectivity; EU overseas country and territory (OCT), not an outermost region
- Size: about 21 km², with roughly 11,000 residents
- Language: French (official)
- Currency: Euro (EUR)
- Time zone: AST (UTC-4)
- Airport: Gustaf III (SBH), a 650-metre runway that takes small commuter aircraft only
Connectivity Overview
- Technology: 4G LTE. No plan in our catalogue declares 5G here
- Network you get: Orange or Digicel, depending on which plan you buy
- Best coverage: Gustavia and St Jean, then the other settled bays
- Not covered: the Colombier trail, offshore anchorages, the outer islets
- EU roaming: does not apply — see the section below before you rely on your home tariff
- Plan sizes we sell: 1 GB to 20 GB, plus unlimited from 3 to 30 days
The EU Roaming Trap: read this before you rely on your home plan
Saint-Barthélemy is French. It uses the euro, it has French emergency numbers, and its shops price in the same currency as Madrid or Paris. Every one of those signals points a European traveller towards the same conclusion — that their own tariff will work here the way it works in Guadeloupe or Martinique. It will not, and this is the most expensive wrong assumption on the island.
What actually changed, and when
On 1 January 2012, Saint-Barthélemy ceased to be an EU outermost region and became an overseas country and territory (OCT) instead, under European Council Decision 2010/718/EU. The European Parliament summary of that file describes the island as becoming the 26th country and territory associated with the European Union. Association is not membership: the EU acquis does not apply in an OCT the way it does in a French outermost region.
✅ EU roaming DOES apply
- • Guadeloupe and Martinique
- • French Guiana
- • Réunion and Mayotte
- • Saint-Martin (MF), the French half of the island next door
These are EU outermost regions.
❌ EU roaming does NOT apply
- • Saint-Barthélemy (since 1 January 2012)
- • French Polynesia, New Caledonia, Wallis and Futuna
- • Saint-Pierre-et-Miquelon
- • Sint Maarten (SX), the Dutch half next door, which is also an OCT
These are OCTs associated with the EU, not part of it.
🧭 What to do about it
- • Check your own tariff by name. Some operators include St Barth anyway, as a commercial choice rather than a legal obligation. That is worth confirming, and it is not something you can infer from the flag.
- • Turn data roaming OFF on your home line before you land, and leave it off. Rest-of-world day rates are what fills the horror stories about this island.
- • Buy a data plan and keep the home line for SMS and calls. That is the combination that costs a known amount.
- • The same warning applies to Sint Maarten. If your trip routes through SXM, the Dutch side is an OCT too.
Why an eSIM Makes Sense on Saint-Barthélemy
eSIM vs a local SIM card
✅ eSIM
- • Installed at home on Wi-Fi, working the moment you land
- • A known price, paid in advance, instead of an OCT roaming bill
- • Keeps your usual number live for banking codes and calls
- • No shop, no queue, no counter hours on a small island
- • Managed from the phone itself
❌ Local SIM
- • Needs an open shop, in business hours, with your passport
- • French-language paperwork and registration
- • Those are exactly the hours you came here for
- • Upside: it does give you a French number, which an eSIM does not
- • Worth it for a long stay, rarely for a week
What the island itself demands of your phone
Restaurants book out
In high season the table is arranged days ahead, by phone or message, not on the door
There is no public transport
No bus network; a rental car or scooter and a map on your phone is the default
Villa Wi-Fi varies house to house
Some of it is excellent and some is not; nobody publishes a figure you can plan around
Arrival day is somewhere else
You land in Sint Maarten, where a St Barth country plan does nothing at all
Hurricane season
June to November, independent data is genuine redundancy rather than convenience
Weather decides the boats
Ferry and commuter-flight plans change at short notice, and you want to hear about it
Saint Barthélemy eSIM Pricing & Plans
💰 Loading Current Saint Barthélemy eSIM Prices...
How to Install Your Saint Barthélemy eSIM
Before You Travel
- 1
Check your phone supports eSIM and is not carrier-locked
- 2
Buy the plan that matches your route — country plan, or Caribbean regional if you are island-hopping
- 3
Install the QR code at home, on Wi-Fi, while you can still fix problems
Upon Arrival
- 4
Set the eSIM as your default data line
- 5
Switch data roaming ON for the eSIM line — and OFF for your home line
- 6
Leave network selection on automatic and let it register
Pro tip: the moment to discover your phone is carrier-locked is not the ferry queue in Philipsburg. Install before departure, on Wi-Fi, and simply switch the line on when you land.
Network Coverage Across Saint Barthélemy
Saint-Barthélemy is about 21 km² of steep volcanic hills with roughly 11,000 residents, and coverage is built around where those residents live. That makes the honest description a list of places rather than a percentage: there is no published per-beach measurement for this island, and any guide showing you one has invented it.
Reliable — the settled parts
- • Gustavia — the town, the harbour and the quays
- • St Jean — the airport, the beach and the shops behind it
- • Lorient — the village and its beach
- • Flamands — the hotel bay on the north-west coast
- • Grand Cul-de-Sac — the lagoon and the road around it
- • Shell Beach — a walk from the middle of Gustavia
Patchy or absent — plan around it
- • The Colombier trail — no road in; the walk drops in and out
- • Gouverneur and Saline — behind hills, down single-track roads
- • Offshore anchorages — a land network does not reach you at anchor outside the harbour
- • Île Fourchue and the outer rocks — assume nothing
- • The windward side, in the dips — the terrain, not the operator, is the problem
Practical consequence: download offline maps before you drive to Gouverneur, Saline or the Colombier trailhead, and do any large upload from Gustavia, St Jean or your accommodation. On a 21 km² island you are never more than about twenty minutes from a signal — but "not far" is not the same as "connected", and the difference matters when you are the one walking back.
Travel Recommendations for Saint Barthélemy
Pick the profile that matches your trip. The data figures below come from the sizes we actually sell for Saint-Barthélemy, and the coverage notes come from our own network data, not from a brochure:
Villa or Hotel Week
The most common St Barth trip: a week in a villa or small hotel around St Jean, Flamands, Lorient or Grand Cul-de-Sac
Data Needs
5-10GB for a week
Recommendation
The island is 21 km². There is very little navigation to do and most of the day happens on a beach, so a modest country plan goes a long way. Treat it as the backup for villa Wi-Fi, not the other way round.
What actually matters:
- ✓Restaurant booking is the real use case — tables go fast in high season
- ✓Villa Wi-Fi quality varies house to house; nobody publishes a number you can rely on
- ✓Buy the plan before you fly and install it on home Wi-Fi
- ✓Leave network selection on automatic
- ✓A country plan covers St Barth and nothing else
Day Trip or Transit via Sint Maarten
Almost everyone arrives through Princess Juliana (SXM) in Sint Maarten and continues by ferry or by a short commuter flight into Gustaf III (SBH)
Data Needs
Depends entirely on which plan you buy
Recommendation
This is the decision that catches people out. A Saint-Barthélemy country plan does not work in Sint Maarten or Saint-Martin — they are separate countries on separate operators. If you want data on arrival day, you need the Caribbean regional package or a second profile.
What actually matters:
- ✓St Barth, Sint Maarten (SX) and Saint-Martin (MF) are three separate destinations for eSIM purposes
- ✓Our Caribbean regional package covers all three, so it is the single-profile answer
- ✓Great Bay Express sails from Philipsburg on the Dutch side, about 45 minutes
- ✓Voyager sails from Marigot on the French side, about an hour
- ✓Commuter flights from SXM take around 10 minutes
Beach Hopper with a Rental Car
Driving between Gouverneur, Saline, Colombier, Flamands and Shell Beach — the only practical way to see the island
Data Needs
5-10GB for a week
Recommendation
There is no public bus system on St Barth, so a rental car (or a scooter) and a map on your phone is the default. Coverage follows the settlements and the road, not the coastline.
What actually matters:
- ✓Download offline maps before you go — the roads are steep, narrow and badly signed
- ✓Gouverneur and Saline are reached down single-track roads over a hill
- ✓Colombier has no road at all: it is a 20-30 minute walk in, or arrive by boat
- ✓Park and walk; there is no parking at most beaches beyond a dirt shoulder
- ✓Left-hand-drive cars, right-hand traffic, French road signs
Yacht and Charter Guest
Alongside or at anchor in Gustavia harbour, or day-sailing to Colombier and the offshore islets
Data Needs
10-20GB, or an unlimited plan for a longer charter
Recommendation
A land eSIM is a land network. In Gustavia harbour and close along the leeward coast you are on the island's own towers and it behaves normally. Once you are genuinely offshore, or behind the rocks to windward, expect nothing.
What actually matters:
- ✓Plan uploads for when you are alongside, not under way
- ✓Île Fourchue, Pain de Sucre and the outer rocks are not covered
- ✓A data eSIM does not replace VHF — channel 16 is still the safety net at sea
- ✓Sea rescue is 196 (CROSS) from a French mobile line
- ✓Anchoring and mooring in the marine reserve is regulated; check locally before you drop
Sailing Week and Event Visitor
In town for the St Barth Bucket in March or Les Voiles de Saint-Barth in April, when the island fills up and so does the network
Data Needs
15-20GB or unlimited
Recommendation
Event weeks are the one time congestion is a real factor on a network built for about 11,000 residents. Buy more headroom than you think you need and expect slower evenings in Gustavia.
What actually matters:
- ✓Upload photo and video batches early in the day, not at 8pm on the quay
- ✓Coverage is best in Gustavia and St Jean, which is where the events are
- ✓Unlimited-by-duration plans exist in our catalogue for exactly this case
- ✓Accommodation books out a year ahead for these weeks
- ✓Prices across the island rise with the crowds — budget accordingly
Long Stay and Remote Work
Working from the island for a few weeks, where the villa connection has to have a fallback
Data Needs
20GB+ or an unlimited plan
Recommendation
St Barth is 6,700 km from Europe and roughly in the US Eastern time zone, which usually decides your working hours more than the network does. For video calls, having your own data alongside the house connection is redundancy rather than luxury.
What actually matters:
- ✓Unlimited-by-duration plans run up to 30 days in our catalogue
- ✓Hurricane season runs June to November; independent data matters most then
- ✓Everything is priced in euros and the island is expensive by Caribbean standards
- ✓French is the working language; English is widely spoken in tourism
- ✓Test a video call on the eSIM before you rely on it for a meeting
💡 The one thing to get right
Saint-Barthélemy is French, uses the euro and has French emergency numbers — but it is an EU overseas country and territory, not an outermost region, and has been since 1 January 2012. EU "roam like at home" does not cover it. A Spanish, French or German plan that works in Guadeloupe or Martinique at no extra cost will bill St Barth at rest-of-world rates unless your operator has chosen to include it commercially. Check your own tariff before you assume, and buy a plan if the answer is the usual one.
Must-Visit Places in Saint Barthélemy
Beaches
Shell Beach
Walkable from the middle of Gustavia, and covered the whole way
St Jean Beach
Beach clubs and water sports, directly under the airport approach
Colombier Beach
No road: a 20-30 minute walk in, or arrive by boat. Signal is unreliable on the trail
Gouverneur Beach
A crescent reached over a hill on a steep single-track road
Saline Beach
Undeveloped, reached on foot from the salt pond car park
Flamands
The long north-west beach, with most of the island hotel stock behind it
Town and history
Gustavia Harbour
The working heart of the island: quays, chandlery, restaurants and shops
The Swedish legacy
France ceded the island to Sweden in 1784 and bought it back in 1878. Gustavia is named after Gustav III, and the street names and forts still carry it
Fort Gustav
The remains above the harbour, with the lighthouse and the view over Gustavia
Lorient
The older village side of the island, quieter than Gustavia and St Jean
Grand Cul-de-Sac
A shallow protected lagoon, the calmest water on the island
The St Jean approach
Gustaf III has a 650-metre runway, one of the shortest in commercial use, and the descent over the hill is the island postcard
Which Network Your eSIM Uses
⚠️ The answer is per plan, not per island
Several operators are present on Saint-Barthélemy, but any one eSIM is only entitled to the network its own plan declares. Checked against our coverage data on 15 September 2026, our plan families here declare different operators — which means the usual advice of "try the other one" is precisely the advice that will leave you with bars and no data. Leave network selection on automatic, and only choose by hand if you already know which operator your plan declares.
Orange
The network declared by the Saint-Barthélemy country plans we serve through eSIMaccess — the 1 GB, 3 GB, 5 GB, 10 GB and 20 GB sizes. Orange Caraïbe is the incumbent French operator in the Antilles.
Digicel
The network declared by the Saint-Barthélemy plans we serve through Airalo, and also by the Caribbean regional package on this island. Every one of those rows records 4G.
Also on the island, but not in your plan
SFR Caraïbe and Dauphin Telecom also operate here. They may well appear in your phone list of available networks, and selecting one will not give you data on any plan we sell. That is what a manual network selection mistake looks like on this island.
On 5G: we do not claim it here. Our eSIMaccess coverage rows report 5G for practically every destination, which makes them useless as evidence, and our Airalo rows for Saint-Barthélemy all say 4G. Treat this as a 4G island and you will not be disappointed.
Troubleshooting Common Issues
No service after landing
- • Turn data roaming ON for the eSIM line — this is the number one cause
- • Check the eSIM is set as the default data line, not just installed
- • Restart the phone once after activation
- • If you must pick a network by hand, pick the one your plan declares — Orange for our eSIMaccess plans, Digicel for the Airalo ones and the Caribbean regional
- • If you are still in Sint Maarten, a St Barth country plan is simply out of area and working correctly
Slow data
- • Check your remaining allowance first
- • Move out from behind a hill — the terrain here is steep and does most of the blocking
- • Do not switch to another operator: your plan is entitled to one of them
- • Expect slower evenings in Gustavia during the March and April regatta weeks
- • Reset network settings only as a last resort
Nothing at all on a walk or at anchor
- • The Colombier trail, the outer islets and offshore anchorages are not covered — this is expected, not a fault
- • Download offline maps before you set out
- • Toggle airplane mode when you get back within range to force a fresh registration
- • At sea, VHF channel 16 is the safety net, not your data plan
An unexpectedly large bill from your home operator
- • This is the OCT problem, not an eSIM problem: your home line roamed at rest-of-world rates
- • Turn data roaming OFF on the home line and leave it off for the whole trip
- • Keep the home line active for SMS and calls only
- • The same applies in Sint Maarten, which is also outside the EU roaming zone
Emergency Contacts in Saint Barthélemy
Emergency calls work with no active SIM or eSIM at all: the phone will use whichever network it can reach. Saint-Barthélemy is French territory, so the French numbers apply.
Emergency numbers
- Medical emergency (SAMU)15
- Police / gendarmerie17
- Fire and rescue18
- European emergency number112
- Sea rescue (CROSS)196
Direct lines
- Hôpital de Bruyn, Gustavia+590 590 27 60 35
- Gendarmerie+590 590 27 11 70
We only publish numbers we can confirm in a source. For anything else, dial 15, 17, 18 or 112, or ask your accommodation — an out-of-date direct line in an emergency is worse than no line at all.
Worth knowing: the Hôpital de Bruyn is a small facility. Serious cases are transferred off-island, usually to Guadeloupe or Sint Maarten, which is why travel insurance with medical evacuation is not optional here. Your eSIM is a data plan: use WhatsApp or another VoIP app for ordinary calls, and the numbers above for emergencies.
Cultural Tips for Saint Barthélemy
Worth doing
- Say "bonjour" on entering a shop — in French practice it is not optional politeness
- Book restaurants ahead, especially December to April
- Dress for dinner; the island is informal but not beachwear-in-town informal
- Learn a few French phrases — English is common in tourism, not universal
- Budget in euros and expect European-plus prices for almost everything
Worth avoiding
- Wearing swimwear away from the beach, in Gustavia in particular
- Photographing people, private villas or yachts without asking
- Assuming shops keep all-day hours; many close over the middle of the day, as in France
- Assuming your home tariff covers you — it is an OCT, so it very likely does not
- Anchoring wherever you like: parts of the coast are a regulated marine reserve
A note on the name: the island is Saint-Barthélemy officially, St Barth or Saint-Barth to the people who live there, and "St Barts" mostly in English-language marketing. Using the local form is a small courtesy that costs nothing.
Frequently Asked Questions
Does EU roaming work in Saint-Barthélemy?
Almost certainly not, and this is the most expensive assumption a European traveller can make here. Saint-Barthélemy is French and uses the euro, but it stopped being an EU outermost region on 1 January 2012 and became an overseas country and territory (OCT) instead. EU "roam like at home" applies inside the Union, and an OCT is associated with the Union rather than part of it. So a Spanish, French, German or Italian tariff that covers Guadeloupe and Martinique at no extra cost will usually bill St Barth at rest-of-world rates. Some operators include it anyway as a commercial choice, which is exactly why you have to check your own tariff rather than reason from the flag.
What network will my eSIM actually connect to?
It depends on the plan you bought, not on the island. Checked against our own coverage data on 15 September 2026: the Saint-Barthélemy country plans we serve through eSIMaccess declare Orange, and the ones served through Airalo declare Digicel, as does the Caribbean regional package. Every row says 4G; nothing in our catalogue declares 5G here. In practice, leave network selection on automatic. If you force it by hand and pick the operator your plan is not entitled to, you get full bars and no data.
Can one eSIM cover St Barth and Sint Maarten or Saint-Martin?
Only the Caribbean regional package. Saint-Barthélemy (BL), Sint Maarten (SX) and Saint-Martin (MF) are three separate destinations on separate operators, and a country plan for one does not work in the others. Our Caribbean regional package lists 24 destinations and includes all three, which makes it the single-profile answer for an island-hopping trip. A St Barth country plan is cheaper per GB but covers St Barth alone — including none of the ferry crossing or the airport day in Sint Maarten.
How do you get to St Barth, and will the phone work on the way?
Gustaf III (SBH) takes only small commuter aircraft, so nearly everyone routes through Princess Juliana (SXM) in Sint Maarten. From there it is roughly a 10-minute flight, or a ferry: Great Bay Express from Philipsburg on the Dutch side takes about 45 minutes, and Voyager from Marigot on the French side takes about an hour. Schedules and fares change by season, so confirm with the operator on the day. During any of those crossings a Saint-Barthélemy country plan gives you nothing — you are still in SX or MF waters. Airport Wi-Fi, a regional plan or a second profile are the three honest options.
How much data do I need for a week on St Barth?
Less than you would use in a city. The island is about 21 km² with roughly 11,000 residents; there is very little navigation to do and most of the day happens on a beach or on a boat. 5 to 10 GB comfortably covers messaging, mail, maps and a steady stream of photos for a week. Go to 20 GB or an unlimited plan if you are working remotely, making daily video calls home, or uploading video rather than stills. Our country plans run from 1 GB up to 20 GB, plus unlimited-by-duration options from 3 to 30 days.
Will I have signal at the beaches?
In the built-up parts, yes. Gustavia, St Jean, Lorient, Flamands and Grand Cul-de-Sac all sit next to settlements and behave normally. The honest exceptions are the ones nobody mentions: Colombier has no road and is reached on foot or by boat, and the walk in drops in and out; Gouverneur and Saline sit behind hills down single-track roads and can go quiet in the dip; and out at anchor, or behind the rocks to windward, you should expect nothing at all. Download offline maps before you set off for any of those.
Can I use the eSIM on a yacht in Gustavia harbour?
Alongside or at anchor in the harbour, yes — you are on the island towers and it behaves like being on land. Close along the leeward coast it usually holds. Once you are genuinely offshore, or around at Île Fourchue and the outer islets, a land eSIM is out of range and there is no point pretending otherwise. A data plan is never a substitute for VHF at sea; channel 16 and the CROSS sea-rescue number 196 are the safety net.
Should I just buy a local SIM when I arrive?
For a long stay it is reasonable, and it gives you a French number, which an eSIM does not. What it adds is finding an open shop with your passport on a small island in business hours — on a trip where those hours are the point. For a week, landing already connected usually wins. Note too that the eSIM is data only: keep your usual line active for SMS and calls, with its data roaming switched off so it cannot quietly bill you at OCT rates.
What are the emergency numbers on St Barth?
It is French territory, so the French numbers apply: 15 for medical (SAMU), 17 for police and gendarmerie, 18 for fire, and 112 as the general European emergency number, which also works from a phone with no active SIM. At sea, 196 reaches CROSS sea rescue. The island hospital, the Hôpital de Bruyn in Gustavia, is on +590 590 27 60 35. Save these before you fly — they are the numbers worth having when the thing you do not have is a working data plan.
Related Guides
Land on St Barth already connected
Buy before you fly, install on home Wi-Fi, and leave your own line roaming-free. Live catalogue prices and declared coverage — no promises we cannot back with data.