Sea temperatures by city

Mean sea-surface temperatures for 101 coastal cities, updated from NOAA / Copernicus monthly climatology. Warmest waters right now, coldest, and the full year for every city.

Warmest sea temperatures right now — June

Ranked by current monthly mean. Tap any city to see its full sea-temp breakdown for June.

Coldest waters in June

Wetsuit territory. Cold-plunge enthusiasts and ice swimmers — these are your spots.

Reykjavík 9.6°C Melbourne 12.1°C Montevideo 13.4°C Cape Town 13.8°C Punta del Este 14.4°C Tallinn 14.5°C Dublin 16.2°C Helsinki 16.6°C

What the temperatures mean

26°C+ — bath-warm, tropical, swimmable for hours
23-25°C — warm, comfortable for extended swimming
20-22°C — pleasant, swimmable without a wetsuit
17-19°C — cool, swimmable but bracing
14-16°C — cold, wetsuit recommended
10-13°C — very cold, thick wetsuit only
<10°C — freezing, polar-plunge only, cold-shock risk

All 101 coastal cities, 12-month sea temperatures

Highlighted cell = June (right now). Peak = warmest month, low = coldest. Click any cell for full conditions.

City	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Abu Dhabi United Arab Emirates	22.1°C	21.3°C	23.6°C	25.8°C	29.6°C	32.9°C	34.5°C	34.8°C	34.1°C	32.0°C	28.7°C	24.6°C
Agadir Morocco	18.0°C	17.3°C	17.7°C	19.0°C	19.2°C	20.3°C	21.1°C	21.6°C	21.3°C	21.6°C	19.8°C	18.2°C
Aruba (Oranjestad) Aruba	26.7°C	26.3°C	26.4°C	26.8°C	27.6°C	27.8°C	27.6°C	28.4°C	29.4°C	30.2°C	29.5°C	28.0°C
Athens Greece	16.7°C	15.8°C	15.7°C	17.4°C	19.1°C	23.9°C	27.1°C	27.8°C	26.0°C	24.2°C	21.8°C	17.9°C
Bali (Denpasar) Indonesia	29.3°C	29.6°C	29.6°C	29.5°C	29.1°C	28.5°C	27.7°C	27.0°C	27.3°C	28.4°C	29.7°C	30.1°C
Barcelona Spain	14.0°C	13.5°C	14.2°C	15.5°C	18.3°C	21.8°C	25.5°C	27.4°C	25.2°C	22.2°C	17.8°C	15.6°C
Beirut Lebanon	20.3°C	18.6°C	18.6°C	20.1°C	22.3°C	26.2°C	29.2°C	30.7°C	29.7°C	27.2°C	23.8°C	21.6°C
Belém Brazil	29.7°C	29.5°C	29.5°C	29.9°C	30.5°C	30.5°C	30.4°C	30.3°C	29.9°C	29.6°C	29.7°C	29.9°C
Bora Bora French Polynesia	28.7°C	29.0°C	29.6°C	29.5°C	28.8°C	28.0°C	27.4°C	27.2°C	27.2°C	27.4°C	27.7°C	28.2°C
Boracay Philippines	27.5°C	26.8°C	27.2°C	28.8°C	30.3°C	30.4°C	30.0°C	29.7°C	29.5°C	29.8°C	29.4°C	28.7°C
Boston United States	4.2°C	3.5°C	4.6°C	7.9°C	13.2°C	17.8°C	19.3°C	19.6°C	19.4°C	15.1°C	10.3°C	6.2°C
Brisbane Australia	27.2°C	27.6°C	26.7°C	24.1°C	20.3°C	18.2°C	17.1°C	18.6°C	21.5°C	22.9°C	25.0°C	27.5°C
Cabo San Lucas Mexico	22.9°C	21.0°C	21.1°C	21.0°C	22.3°C	25.4°C	27.6°C	29.9°C	29.4°C	29.3°C	27.2°C	25.2°C
Cairns Australia	30.1°C	30.1°C	29.2°C	28.6°C	25.6°C	24.3°C	23.9°C	23.3°C	24.6°C	26.4°C	27.9°C	29.4°C
Cancún Mexico	26.9°C	26.7°C	26.8°C	27.1°C	27.4°C	28.5°C	29.1°C	28.8°C	29.5°C	29.4°C	28.6°C	27.5°C
Cape Town South Africa	13.7°C	15.0°C	15.1°C	13.8°C	13.9°C	13.8°C	13.5°C	13.9°C	14.1°C	14.7°C	14.4°C	14.5°C
Cartagena Colombia	28.8°C	28.1°C	28.2°C	28.5°C	29.8°C	30.3°C	30.3°C	30.3°C	30.6°C	30.2°C	29.8°C	29.7°C
Cebu Philippines	28.4°C	27.8°C	28.1°C	29.1°C	30.1°C	30.4°C	30.2°C	30.3°C	30.3°C	30.6°C	30.1°C	29.2°C
Copenhagen Denmark	2.8°C	2.7°C	3.5°C	7.0°C	12.4°C	16.9°C	18.8°C	18.9°C	18.0°C	12.3°C	8.1°C	4.8°C
Da Nang Vietnam	23.9°C	24.0°C	25.0°C	26.8°C	28.7°C	31.2°C	30.4°C	31.6°C	31.2°C	29.4°C	27.4°C	25.5°C
Dar es Salaam Tanzania	29.7°C	30.1°C	30.0°C	29.0°C	28.4°C	27.6°C	26.6°C	26.5°C	27.0°C	28.1°C	29.1°C	30.3°C
Daytona Beach United States	17.6°C	18.2°C	20.4°C	22.5°C	25.6°C	28.1°C	29.1°C	28.9°C	28.8°C	26.0°C	23.2°C	19.2°C
Dubai United Arab Emirates	22.4°C	21.7°C	23.8°C	25.7°C	29.7°C	33.2°C	34.6°C	34.4°C	33.7°C	31.8°C	28.5°C	24.5°C
Dublin Ireland	7.2°C	7.6°C	7.8°C	10.2°C	13.7°C	16.2°C	16.1°C	16.9°C	16.2°C	13.9°C	11.4°C	8.3°C
Dubrovnik Croatia	15.7°C	14.8°C	15.0°C	16.5°C	19.3°C	24.4°C	26.9°C	27.0°C	25.1°C	22.7°C	19.7°C	17.3°C
Durban South Africa	24.1°C	25.5°C	25.2°C	24.1°C	23.8°C	22.4°C	21.8°C	21.3°C	20.8°C	21.7°C	22.7°C	24.0°C
Florianópolis Brazil	27.0°C	27.4°C	27.2°C	24.4°C	22.3°C	19.9°C	17.5°C	18.6°C	20.4°C	21.5°C	24.0°C	25.5°C
Goa India	27.8°C	28.4°C	29.1°C	30.7°C	31.2°C	30.4°C	27.7°C	28.1°C	28.9°C	29.9°C	30.0°C	28.9°C
Gold Coast Australia	25.9°C	26.4°C	25.8°C	24.8°C	22.7°C	21.1°C	20.2°C	20.6°C	21.4°C	22.4°C	23.4°C	24.1°C
Grand Cayman Cayman Islands	27.5°C	26.9°C	27.4°C	28.1°C	29.3°C	29.6°C	30.0°C	30.6°C	30.6°C	30.4°C	29.3°C	28.4°C
Havana Cuba	26.7°C	26.4°C	26.6°C	26.9°C	28.1°C	29.4°C	29.8°C	30.4°C	30.4°C	29.4°C	28.3°C	27.4°C
Helsinki Finland	-0.2°C	-0.2°C	0.3°C	3.2°C	9.9°C	16.6°C	18.3°C	19.4°C	17.5°C	10.6°C	5.3°C	1.4°C
Hong Kong Hong Kong	18.6°C	19.0°C	20.6°C	24.6°C	26.3°C	28.4°C	29.3°C	28.5°C	28.2°C	27.6°C	24.8°C	21.0°C
Honolulu United States	25.1°C	24.5°C	24.4°C	24.7°C	25.0°C	25.8°C	26.2°C	26.5°C	27.0°C	27.0°C	26.2°C	25.6°C
Hurghada Egypt	22.7°C	21.3°C	22.2°C	23.2°C	24.6°C	27.0°C	28.9°C	29.6°C	28.4°C	26.8°C	25.7°C	23.8°C
Istanbul Turkey	10.4°C	8.8°C	9.5°C	11.4°C	14.3°C	20.5°C	24.8°C	24.9°C	24.3°C	20.4°C	16.6°C	12.2°C
Jericoacoara Brazil	28.9°C	28.9°C	29.3°C	29.7°C	29.6°C	29.0°C	28.2°C	27.6°C	27.5°C	27.7°C	28.0°C	28.6°C
João Pessoa Brazil	29.6°C	29.8°C	30.1°C	30.1°C	29.3°C	27.8°C	26.8°C	26.8°C	27.1°C	27.9°C	28.5°C	29.0°C
Key West United States	24.2°C	24.2°C	25.6°C	26.3°C	28.8°C	30.0°C	31.2°C	31.4°C	31.0°C	28.7°C	27.1°C	24.7°C
Kingston Jamaica	27.7°C	27.2°C	27.6°C	28.4°C	29.3°C	29.5°C	29.6°C	30.4°C	30.8°C	30.8°C	29.7°C	28.7°C
Koh Samui Thailand	28.6°C	29.1°C	29.7°C	31.7°C	32.1°C	30.9°C	30.5°C	30.7°C	30.1°C	30.5°C	29.8°C	28.8°C
Kona (Big Island) United States	25.4°C	25.3°C	25.0°C	25.3°C	26.0°C	26.5°C	26.8°C	27.1°C	27.3°C	27.1°C	26.8°C	26.1°C
Krabi Thailand	29.1°C	29.6°C	30.2°C	31.6°C	32.1°C	30.8°C	30.3°C	30.4°C	29.8°C	30.4°C	30.2°C	29.5°C
Lisbon Portugal	15.0°C	14.7°C	15.1°C	16.7°C	17.5°C	19.5°C	19.5°C	19.4°C	18.5°C	19.2°C	17.6°C	15.8°C
Lombok Indonesia	29.4°C	29.3°C	29.6°C	30.1°C	29.7°C	28.9°C	28.6°C	28.1°C	28.3°C	29.0°C	30.2°C	29.9°C
Loreto Mexico	19.8°C	19.1°C	20.2°C	21.3°C	24.0°C	27.1°C	29.0°C	30.8°C	31.1°C	29.6°C	26.1°C	22.6°C
Los Angeles United States	14.9°C	14.5°C	14.5°C	14.8°C	16.4°C	18.3°C	20.2°C	21.2°C	20.8°C	18.9°C	16.6°C	15.9°C
Maceió Brazil	28.7°C	28.9°C	29.7°C	29.7°C	29.1°C	27.5°C	26.6°C	26.7°C	26.9°C	27.6°C	27.9°C	28.4°C
Málaga Spain	15.1°C	15.2°C	15.3°C	17.3°C	19.2°C	21.2°C	24.6°C	26.3°C	25.0°C	20.2°C	18.4°C	16.7°C
Manila Philippines	27.7°C	27.6°C	28.6°C	30.5°C	31.7°C	31.4°C	30.8°C	30.5°C	30.0°C	30.3°C	29.8°C	28.8°C
Marseille France	14.5°C	13.7°C	13.9°C	14.5°C	17.2°C	21.2°C	22.4°C	23.2°C	22.3°C	20.2°C	17.4°C	14.6°C
Maui (Kahului) United States	25.3°C	24.7°C	24.9°C	25.2°C	25.9°C	26.5°C	26.9°C	27.2°C	27.3°C	27.2°C	26.6°C	25.7°C
Melbourne Australia	22.2°C	21.6°C	20.5°C	17.4°C	14.5°C	12.1°C	10.5°C	11.7°C	13.4°C	16.0°C	18.9°C	21.3°C
Miami United States	22.6°C	23.6°C	25.6°C	26.3°C	28.9°C	30.2°C	32.2°C	31.6°C	30.7°C	28.0°C	25.7°C	23.6°C
Mombasa Kenya	28.8°C	28.9°C	29.5°C	29.5°C	28.4°C	27.5°C	26.7°C	26.3°C	26.7°C	27.3°C	28.0°C	29.1°C
Montego Bay Jamaica	27.9°C	27.3°C	27.6°C	28.2°C	29.3°C	29.6°C	29.5°C	30.4°C	30.8°C	30.8°C	29.7°C	28.6°C
Montevideo Uruguay	24.7°C	24.7°C	24.0°C	19.6°C	15.7°C	13.4°C	11.1°C	11.9°C	14.0°C	17.9°C	20.9°C	22.9°C
Mykonos Greece	16.2°C	16.0°C	16.1°C	17.2°C	18.7°C	22.4°C	24.7°C	25.6°C	24.6°C	22.8°C	20.0°C	17.4°C
Nadi (Fiji) Fiji	30.2°C	30.5°C	30.0°C	29.9°C	29.3°C	27.9°C	26.8°C	26.3°C	26.9°C	27.6°C	28.6°C	29.7°C
Naples Italy	16.4°C	15.0°C	15.0°C	16.3°C	19.2°C	23.8°C	27.2°C	27.4°C	25.5°C	23.4°C	20.6°C	18.0°C
Naples (FL) United States	19.7°C	20.9°C	24.3°C	25.8°C	28.9°C	30.1°C	31.9°C	31.4°C	30.7°C	27.2°C	24.5°C	20.2°C
Nassau Bahamas	24.4°C	23.9°C	25.0°C	25.8°C	28.1°C	29.5°C	30.9°C	30.7°C	30.2°C	28.7°C	26.3°C	24.5°C
Natal Brazil	29.1°C	29.3°C	29.8°C	29.7°C	29.1°C	27.8°C	26.9°C	26.7°C	26.8°C	27.5°C	28.1°C	28.6°C
New York United States	5.3°C	4.9°C	6.6°C	10.2°C	15.0°C	19.4°C	23.5°C	23.1°C	22.3°C	17.5°C	12.5°C	7.3°C
Panama City Panama	28.6°C	27.0°C	27.2°C	28.3°C	29.9°C	30.2°C	29.7°C	29.9°C	30.1°C	30.1°C	29.0°C	29.3°C
Papeete (Tahiti) French Polynesia	28.6°C	28.9°C	29.4°C	29.1°C	28.5°C	27.7°C	27.3°C	26.9°C	26.5°C	27.1°C	27.6°C	28.4°C
Penang (George Town) Malaysia	30.4°C	31.2°C	32.0°C	32.4°C	32.1°C	31.9°C	31.6°C	31.3°C	31.1°C	31.0°C	30.9°C	30.4°C
Pensacola United States	16.3°C	17.0°C	19.6°C	21.5°C	25.4°C	27.8°C	29.3°C	30.4°C	29.4°C	25.1°C	22.0°C	18.0°C
Phuket Thailand	29.1°C	29.6°C	30.1°C	31.2°C	31.8°C	30.7°C	30.3°C	30.3°C	29.7°C	30.3°C	30.2°C	29.5°C
Playa del Carmen Mexico	27.3°C	27.0°C	27.3°C	27.9°C	28.9°C	29.7°C	29.8°C	30.2°C	30.5°C	29.9°C	28.9°C	27.8°C
Port Louis (Mauritius) Mauritius	28.1°C	28.0°C	28.2°C	28.0°C	27.0°C	25.9°C	25.0°C	24.5°C	24.4°C	25.1°C	26.5°C	27.8°C
Puerto Vallarta Mexico	25.4°C	25.1°C	25.0°C	24.5°C	27.1°C	29.0°C	30.1°C	31.3°C	31.6°C	30.8°C	28.6°C	26.9°C
Punta del Este Uruguay	22.0°C	23.1°C	23.3°C	20.7°C	16.9°C	14.4°C	12.0°C	12.0°C	12.8°C	15.6°C	17.9°C	20.3°C
Rarotonga (Cook Islands) Cook Islands	26.9°C	28.0°C	28.3°C	27.9°C	26.8°C	25.5°C	25.0°C	24.6°C	24.2°C	24.1°C	24.2°C	25.6°C
Recife Brazil	29.4°C	29.6°C	30.1°C	30.1°C	29.3°C	27.8°C	26.7°C	26.8°C	27.1°C	27.8°C	28.3°C	28.8°C
Reykjavík Iceland	1.9°C	2.1°C	2.9°C	4.2°C	7.1°C	9.6°C	11.4°C	12.4°C	10.3°C	7.8°C	5.9°C	3.7°C
Rio de Janeiro Brazil	25.8°C	27.4°C	26.8°C	25.0°C	24.5°C	23.5°C	22.6°C	22.5°C	23.6°C	23.4°C	23.6°C	24.6°C
Saint-Denis (Réunion) Réunion	28.2°C	28.3°C	28.2°C	27.8°C	27.2°C	25.7°C	24.9°C	24.5°C	24.8°C	25.3°C	26.6°C	27.7°C
Salvador Brazil	27.5°C	28.6°C	29.3°C	29.1°C	28.2°C	26.7°C	26.2°C	26.1°C	26.2°C	26.7°C	26.7°C	27.2°C
San Diego United States	15.0°C	14.7°C	15.4°C	16.2°C	17.9°C	19.0°C	21.0°C	21.5°C	21.1°C	18.9°C	16.8°C	15.6°C
San Juan Puerto Rico	27.0°C	26.5°C	26.6°C	27.0°C	28.5°C	29.3°C	29.4°C	29.7°C	30.2°C	30.4°C	29.4°C	28.3°C
Santorini Greece	17.7°C	17.2°C	17.1°C	17.8°C	19.3°C	23.0°C	24.6°C	25.8°C	25.3°C	23.5°C	21.3°C	19.1°C
Sarasota United States	17.7°C	19.2°C	22.9°C	24.8°C	28.0°C	29.9°C	31.8°C	31.5°C	30.3°C	26.3°C	23.4°C	18.7°C
Singapore Singapore	28.2°C	28.2°C	28.6°C	30.2°C	30.8°C	30.5°C	30.0°C	29.5°C	29.7°C	30.1°C	30.7°C	29.4°C
Split Croatia	14.9°C	14.0°C	14.2°C	16.0°C	18.6°C	23.2°C	26.4°C	26.5°C	24.4°C	22.2°C	19.7°C	16.6°C
St. John's (Antigua) Antigua and Barbuda	26.8°C	26.5°C	26.9°C	27.7°C	28.9°C	29.4°C	29.4°C	29.8°C	30.4°C	30.1°C	29.1°C	28.0°C
St. Kitts (Basseterre) Saint Kitts and Nevis	27.1°C	26.6°C	26.8°C	27.5°C	28.7°C	29.2°C	29.3°C	29.7°C	30.3°C	30.1°C	29.3°C	28.3°C
St. Lucia (Castries) Saint Lucia	27.2°C	27.1°C	27.4°C	27.8°C	28.5°C	28.9°C	29.0°C	29.7°C	30.3°C	30.3°C	29.4°C	28.4°C
Suva Fiji	29.3°C	29.7°C	29.4°C	29.0°C	28.1°C	26.9°C	25.9°C	25.4°C	25.6°C	26.0°C	27.1°C	28.2°C
Sydney Australia	22.4°C	23.4°C	23.1°C	21.8°C	20.9°C	19.7°C	17.7°C	17.7°C	18.4°C	19.0°C	20.0°C	20.8°C
Taipei Taiwan	18.7°C	17.9°C	19.6°C	23.9°C	25.8°C	28.4°C	30.5°C	30.0°C	29.3°C	26.4°C	23.9°C	21.0°C
Tallinn Estonia	1.6°C	0.6°C	1.2°C	3.2°C	8.4°C	14.5°C	19.1°C	20.0°C	17.9°C	13.0°C	8.4°C	5.0°C
Tampa United States	16.9°C	18.9°C	23.0°C	24.8°C	28.0°C	30.0°C	31.9°C	31.5°C	30.4°C	26.2°C	23.3°C	18.3°C
Tangier Morocco	17.5°C	16.5°C	16.3°C	16.9°C	17.8°C	19.8°C	21.9°C	22.1°C	21.6°C	20.5°C	19.7°C	17.8°C
Tulum Mexico	27.1°C	26.7°C	27.2°C	27.9°C	29.0°C	29.9°C	30.1°C	30.7°C	30.6°C	29.8°C	28.8°C	27.5°C
Tunis Tunisia	14.5°C	14.5°C	16.1°C	18.4°C	21.2°C	25.0°C	28.8°C	29.1°C	26.6°C	24.2°C	20.9°C	16.3°C
Turks & Caicos (Providenciales) Turks and Caicos Islands	26.1°C	25.5°C	26.2°C	26.7°C	28.4°C	29.6°C	29.7°C	29.8°C	30.4°C	30.1°C	28.1°C	26.6°C
Valencia Spain	13.9°C	13.5°C	14.7°C	17.5°C	20.4°C	24.1°C	28.0°C	28.9°C	26.2°C	23.0°C	17.5°C	15.0°C
Victoria (Seychelles) Seychelles	28.9°C	29.4°C	30.1°C	30.5°C	29.7°C	28.3°C	26.7°C	26.7°C	27.8°C	28.3°C	29.2°C	28.8°C
West Palm Beach United States	25.0°C	24.9°C	25.4°C	26.1°C	27.9°C	29.3°C	30.8°C	31.0°C	30.7°C	29.0°C	27.7°C	26.2°C
Zanzibar Tanzania	29.4°C	29.5°C	29.7°C	28.9°C	28.4°C	27.6°C	26.6°C	26.2°C	26.7°C	27.4°C	28.5°C	29.8°C

How we measure

Monthly means derived from NOAA OISST satellite climatology (1991-2020 baseline). Numbers represent the average sea-surface temperature within a small radius of each city's coastline — not pool temperatures, not air temperatures. Real-world conditions on any given day vary ±2-3°C from the mean depending on wind, currents, recent storms, and time-of-day heating.

For real-time water temperature on the day you're swimming, check local lifeguard reports or buoy data — these climatological means give you the planning answer ("is it worth bringing a wetsuit to Lisbon in October?"), not the operational answer.

Sea temperatures by city

Warmest sea temperatures right now — June

Coldest waters in June

What the temperatures mean

All 101 coastal cities, 12-month sea temperatures

How we measure

Travel-timing tips, monthly.