swimming & the coast
Sea Water Temperature Worldwide
Current sea surface temperature for 18 coastal cities around the world, updated automatically. Handy for a swim, a dive, or planning a beach day.
Current water temperature by city
Model value for the sea surface via Open-Meteo. Loading...
Warmest right now: –. Right at the shoreline and in shallow water, the real temperature can run a little warmer or cooler than this open-sea model value.
Why does water temperature matter?
For swimmers and divers, water temperature mostly determines comfort and the risk of getting too cold, since the body loses heat far faster in water than in air of the same temperature. For surfers and other watersports, water temperature usually matters less for comfort, since a wetsuit handles most of the cooling, but it still affects marine life and, at a larger scale, the strength of storms that form over warm water.
Frequently asked questions
What is the current sea water temperature?
It varies by location and season. Above are live readings for 18 coastal cities around the world, updated automatically via Open-Meteo.
Is this the air temperature or the water temperature?
This is the sea surface temperature specifically, not the air temperature. The two can differ noticeably, especially on a sunny or windy day.
Does this match what I feel swimming?
It is a model value for the open sea surface near that location, not a measurement at the beach itself. Right at the shoreline and in shallow water it can run a little warmer or cooler than this figure.