Do all Caribbean islands use the same plug?

No. Most Caribbean islands use US-style Type A and B plugs at 110-120 V mains, reflecting American economic influence. Former British colonies (Jamaica, Bahamas, Trinidad and Tobago, Barbados, Eastern Caribbean nations) use UK-style Type G plugs at 110 V or 230 V depending on the island.

Will my US plug work in the Caribbean?

In most US-influenced islands yes, no adapter needed. Includes Puerto Rico, US Virgin Islands, Aruba, Curaçao, Dominican Republic, Haiti, Cuba (parts), and many resort properties on other islands. For Type G islands (Jamaica, Bahamas, Barbados), you need a UK-style adapter.

What's the voltage situation across the Caribbean?

Most US-style islands run at 110-120 V at 60 Hz, matching US mains. Type G islands have a mix: some run at 110 V (Jamaica), others at 230 V (Barbados, Trinidad and Tobago). Voltage variation within an island can occur, especially in older buildings.

What about cruise ships in the Caribbean?

Caribbean cruise ships are typically US-flagged or US-influenced and have US Type A/B outlets in cabins, sometimes with additional European Type C outlets. Specific lines vary: Carnival, Royal Caribbean, NCL, and Princess are US-style; MSC and Costa lean more European.

Is one adapter enough for multiple Caribbean islands?

Usually yes if you bring a universal adapter that covers Type A, B, G, and C. The Caribbean is split roughly 70% US-style and 30% UK-style, so a universal handles both zones.

Travel Adapter for a Caribbean Trip: Type A and B Mostly

The Caribbean is divided roughly 70/30 between US-style and UK-style plug standards. Most islands use Type A and B sockets at 110-120 V, reflecting American economic influence. Former British colonies use Type G at 110 V or 230 V. For a multi-island Caribbean trip or cruise, knowing which zone you're in saves the surprise at check-in.

This guide covers the Caribbean plug map and what to pack.

The Caribbean plug map

US-style islands (Type A and B, 110-120 V)

Puerto Rico (US territory)
US Virgin Islands (US territory)
Aruba (mostly Type A/B at 127 V)
Curaçao (Type A/B at 127 V)
Bonaire (Type A/B at 127 V)
Dominican Republic (Type A/B at 110 V)
Haiti (Type A/B at 110 V)
Cuba (mixed Type A/B and C, mostly 110 V with some 220 V)
Cayman Islands (Type A/B at 120 V)
Turks and Caicos (Type A/B at 120 V)
Bermuda (Type A/B at 120 V, with some Type G in newer construction)

US travelers can use these directly without an adapter. Voltage is close to US 120 V.

British-influenced islands (Type G, 110-230 V)

Jamaica (Type G at 110 V)
Bahamas (Type A/B at 120 V despite British heritage, with some Type G in newer hotels)
Barbados (Type A/B at 115 V despite British heritage)
Trinidad and Tobago (Type A/B at 115 V, some Type G in commercial buildings)
Dominica (Type D and G at 230 V)
Saint Lucia (Type G at 230 V)
Saint Vincent and the Grenadines (Type A/B/G at 230 V)
Grenada (Type G at 230 V)
Antigua and Barbuda (Type A/B at 230 V)
St. Kitts and Nevis (Type A/B at 230 V)

The pattern is inconsistent: some former British colonies use US-style plugs, others use Type G, some mix. Voltage also varies dramatically across this group.

European-influenced islands

Martinique (French overseas, Type C/E at 220 V)
Guadeloupe (French overseas, Type C/E at 220 V)
Saint Martin/Sint Maarten (Type C/E on French side, Type A/B on Dutch side)
Saint Barthélemy (French, Type C/E at 220 V)

What to pack for a Caribbean trip

Single-island US-style trip

If your trip is only to Puerto Rico, US Virgin Islands, Dominican Republic, Cayman Islands, or another clearly US-style island, no adapter is needed for US travelers. For UK or EU travelers, a single US-style adapter handles the trip.

Single-island Type G trip

If your trip is to Jamaica, Saint Lucia, Grenada, or other Type G islands, a UK-style adapter is needed for US travelers. For UK travelers, no adapter is needed. The voltage check matters: some Type G Caribbean islands run at 110 V (Jamaica) which is fine for US devices but slower for UK 230 V appliances.

Multi-island or cruise itinerary

A quality universal adapter is the right buy for any multi-island Caribbean trip. The 70/30 US/UK split means a single-shape adapter only covers one zone. Universal coverage handles both.

For cruises specifically, see our cruise ship adapter guide. Most Caribbean-based cruise lines (Carnival, Royal Caribbean, NCL, Princess) have US-style outlets in cabins, with shore excursions to a mix of US and UK style islands.

Voltage considerations

The Caribbean has three voltage zones:

110-127 V (most islands)

Puerto Rico, US Virgin Islands, Cayman Islands, Bahamas, Cuba (mostly), Dominican Republic, Haiti, Bermuda, Turks and Caicos, Aruba, Curaçao, Bonaire, Jamaica.

US travelers can use any device directly. UK/EU/AU single-voltage 230 V devices will underperform (hair dryers won't reach temperature, kettles boil slowly).

220-230 V

Antigua and Barbuda, St. Kitts and Nevis, Dominica, Saint Lucia, Saint Vincent, Grenada, Trinidad and Tobago, Barbados, Martinique, Guadeloupe.

UK/EU travelers can use devices directly. US single-voltage devices will burn out.

Mixed voltage on the same island

Some islands have both 110-120 V and 220-240 V outlets in the same building, especially older hotels and commercial properties. Verify before plugging in expensive electronics. See our dual-voltage explainer for safe device handling.

Practical answers for common Caribbean travel situations

Will my MacBook charger work in the Caribbean? Yes, on every island. All Apple chargers are dual voltage.

What about Aruba, Curaçao, and Bonaire (ABC islands)? Type A/B at 127 V (slightly higher than US 120 V but within tolerance). US travelers don't need anything.

Are Caribbean hotels reliable for power? Major resorts are reliable. Smaller properties, especially in hurricane-prone areas, have more variable supply. Hurricane season (June-November) brings occasional extended outages.

Can I buy an adapter at any Caribbean airport? Yes at the larger airports (San Juan SJU, Punta Cana PUJ, Nassau NAS, Montego Bay MBJ), at typical airport markup. Smaller island airports may have limited or no adapter retail.

What about charging at beach bars and dive shops? Variable. Beach-front establishments often have only one or two accessible outlets shared among customers. Bring a power bank.

Will my UK three-pin shaver charge in Jamaica? Plug-fit yes (Jamaica uses Type G), voltage match no (Jamaica is 110 V vs UK 230 V). Your shaver will charge slowly or not at all. Bring a US-style replacement or use the hotel's amenity razor.

Caribbean cruise specifics

Caribbean cruises typically depart from US ports (Miami, Port Canaveral, Galveston, San Juan) or European ports (Southampton, Barcelona for trans-Atlantic). Cabin outlets:

US-based cruise ships: predominantly Type A/B at 110 V
European-based cruise ships visiting Caribbean: mix of Type A/B and Type C/F
Cruise lines that operate both: vary by ship

For shore excursions, the universal adapter covers the inconsistency between islands.

What to pack for a typical Caribbean cruise

Universal travel adapter (handles cruise ship and shore excursions)
GaN multi-port USB-C/USB-A charger (4+ ports for cabin charging)
Two USB-C cables, one USB-C to Lightning if you have iPhones
20,000 mAh power bank for long shore excursion days
Skip household power strips (cruise lines ban them)

The bottom line

The Caribbean is split between US-style and UK-style plug standards on different islands. Voltage varies from 110 V to 240 V across the region. A universal adapter handles any combination.

For US travelers, US-style islands (the majority) need no adapter. For UK travelers, Type G islands need no adapter. For multi-island trips or cruises, a universal adapter is the cleanest solution.

Verify voltage at every island before plugging in expensive electronics. The Caribbean's mixed mains voltage catches more travelers than the plug shape does.