OCEAN · SEA TEMPERATURE
Sea Temperature
How warm is the water today? A live sea-surface temperature reading for any coast — the number that decides whether you swim in a t-shirt or a wetsuit, and a quiet indicator of the ocean's wider health.
HOW WARM IS THE SEA? WHERE YOU ARE
Get a live reading of the sea-surface temperature, wave height and swell for the water nearest you.
What the number means
Sea-surface temperature is the warmth of the topmost layer of the ocean — the water you actually swim in. It swings with the seasons, lagging the air by a month or two because water is so slow to heat and cool, and it's nudged around by currents that carry warm or cold water along a coast. As a rough swim guide: below 15 °C most people want a wetsuit, 19–23 °C is comfortable for a swim, and above 27 °C is bath-warm. Unusually warm seas also matter beyond comfort — sustained marine heat stresses coral and fuels stronger storms — so we band the reading honestly rather than just cheering a high number.
Sea temperature by coast
166 COASTSEach coast page reads the live sea-surface temperature for that exact spot, turns it into a plain swim-comfort verdict, and shows the wave height alongside.
USA · PACIFIC
USA · PacificSea temperature — San DiegoUSA · PacificSea temperature — La JollaUSA · PacificSea temperature — Los AngelesUSA · PacificSea temperature — Santa MonicaUSA · PacificSea temperature — Santa CruzUSA · PacificSea temperature — San FranciscoUSA · PacificSea temperature — AstoriaUSA · PacificSea temperature — SeattleUSA · PacificSea temperature — OceansideUSA · PacificSea temperature — Santa BarbaraUSA · PacificSea temperature — Port HuenemeUSA · PacificSea temperature — MontereyUSA · PacificSea temperature — Half Moon BayUSA · PacificSea temperature — Point ReyesUSA · PacificSea temperature — Bodega BayUSA · PacificSea temperature — EurekaUSA · PacificSea temperature — Crescent CityUSA · PacificSea temperature — WestportUSA · PacificSea temperature — La PushUSA · PacificSea temperature — Neah BayUSA · PacificSea temperature — Port Angeles
USA · HAWAII
USA · ALASKA
USA · ATLANTIC
USA · AtlanticSea temperature — Portland, MaineUSA · AtlanticSea temperature — BostonUSA · AtlanticSea temperature — NewportUSA · AtlanticSea temperature — MontaukUSA · AtlanticSea temperature — New York CityUSA · AtlanticSea temperature — Atlantic CityUSA · AtlanticSea temperature — Virginia BeachUSA · AtlanticSea temperature — Outer BanksUSA · AtlanticSea temperature — WilmingtonUSA · AtlanticSea temperature — CharlestonUSA · AtlanticSea temperature — SavannahUSA · AtlanticSea temperature — JacksonvilleUSA · AtlanticSea temperature — MiamiUSA · AtlanticSea temperature — Key WestUSA · AtlanticSea temperature — EastportUSA · AtlanticSea temperature — Bar HarborUSA · AtlanticSea temperature — Wells BeachUSA · AtlanticSea temperature — Rockport, MassachusettsUSA · AtlanticSea temperature — ProvincetownUSA · AtlanticSea temperature — NantucketUSA · AtlanticSea temperature — Sandy HookUSA · AtlanticSea temperature — Seaside HeightsUSA · AtlanticSea temperature — Cape MayUSA · AtlanticSea temperature — Ocean City, MarylandUSA · AtlanticSea temperature — Wrightsville BeachUSA · AtlanticSea temperature — Myrtle BeachUSA · AtlanticSea temperature — Cocoa BeachUSA · AtlanticSea temperature — Daytona BeachUSA · AtlanticSea temperature — Vero BeachUSA · AtlanticSea temperature — Palm BeachUSA · AtlanticSea temperature — Fort Lauderdale
USA · GULF
USA · GulfSea temperature — TampaUSA · GulfSea temperature — Clearwater BeachUSA · GulfSea temperature — PensacolaUSA · GulfSea temperature — GalvestonUSA · GulfSea temperature — Corpus ChristiUSA · GulfSea temperature — Marco IslandUSA · GulfSea temperature — Naples, FloridaUSA · GulfSea temperature — Fort Myers BeachUSA · GulfSea temperature — Venice, FloridaUSA · GulfSea temperature — SarasotaUSA · GulfSea temperature — Panama City BeachUSA · GulfSea temperature — Dauphin IslandUSA · GulfSea temperature — BiloxiUSA · GulfSea temperature — Grand IsleUSA · GulfSea temperature — Port AransasUSA · GulfSea temperature — South Padre Island
CANADA
MEXICO & CARIBBEAN
Mexico & CaribbeanSea temperature — CancúnMexico & CaribbeanSea temperature — Cabo San LucasMexico & CaribbeanSea temperature — Puerto EscondidoMexico & CaribbeanSea temperature — TamarindoMexico & CaribbeanSea temperature — Montego BayMexico & CaribbeanSea temperature — TulumMexico & CaribbeanSea temperature — SayulitaMexico & CaribbeanSea temperature — NosaraMexico & CaribbeanSea temperature — Bocas del Toro
SOUTH AMERICA
UK & IRELAND
UK & IrelandSea temperature — BrightonUK & IrelandSea temperature — NewquayUK & IrelandSea temperature — CornwallUK & IrelandSea temperature — BournemouthUK & IrelandSea temperature — GalwayUK & IrelandSea temperature — St IvesUK & IrelandSea temperature — TenbyUK & IrelandSea temperature — ScarboroughUK & IrelandSea temperature — Lahinch
EUROPE
EuropeSea temperature — LisbonEuropeSea temperature — NazaréEuropeSea temperature — BiarritzEuropeSea temperature — NiceEuropeSea temperature — BarcelonaEuropeSea temperature — San SebastiánEuropeSea temperature — NaplesEuropeSea temperature — SantoriniEuropeSea temperature — EriceiraEuropeSea temperature — HossegorEuropeSea temperature — TarifaEuropeSea temperature — MykonosEuropeSea temperature — AmalfiEuropeSea temperature — SyltEuropeSea temperature — ZandvoortEuropeSea temperature — Split
AFRICA & MIDDLE EAST
Africa & Middle EastSea temperature — Cape TownAfrica & Middle EastSea temperature — DurbanAfrica & Middle EastSea temperature — TaghazoutAfrica & Middle EastSea temperature — DubaiAfrica & Middle EastSea temperature — Tel AvivAfrica & Middle EastSea temperature — Jeffreys BayAfrica & Middle EastSea temperature — ZanzibarAfrica & Middle EastSea temperature — MombasaAfrica & Middle EastSea temperature — DakarAfrica & Middle EastSea temperature — Essaouira
ASIA
AsiaSea temperature — BaliAsiaSea temperature — PhuketAsiaSea temperature — GoaAsiaSea temperature — OkinawaAsiaSea temperature — JejuAsiaSea temperature — Hong KongAsiaSea temperature — SiargaoAsiaSea temperature — Kuta, LombokAsiaSea temperature — Arugam BayAsiaSea temperature — MaléAsiaSea temperature — Da NangAsiaSea temperature — BusanAsiaSea temperature — Kamakura
OCEANIA
OceaniaSea temperature — SydneyOceaniaSea temperature — Gold CoastOceaniaSea temperature — Byron BayOceaniaSea temperature — Bondi BeachOceaniaSea temperature — PerthOceaniaSea temperature — AucklandOceaniaSea temperature — RaglanOceaniaSea temperature — NoosaOceaniaSea temperature — Margaret RiverOceaniaSea temperature — Torquay, VictoriaOceaniaSea temperature — GisborneOceaniaSea temperature — Mount MaunganuiOceaniaSea temperature — Teahupo'o, TahitiOceaniaSea temperature — Sigatoka, Fiji
Go deeper
SEE IT ON THE MAP
Global sea-surface temperature is a live layer on the full map.