Winter escape to warm seas: where you can swim in winter

When it freezes at home, the sea stays swimmable elsewhere. Which coasts are warm enough in winter — and what to check beyond the water temperature.
Grey, cold, short days: the Central European winter is peak season for a beach escape. The good news — some seas stay warm enough to swim all year.
Where the sea stays warm in winter
The reliably swimmable options in the northern winter are the Persian Gulf, the Red Sea, the Indian Ocean and the southern Caribbean. Our "Beach holidays in winter" page gathers the coastal destinations whose sea stays warm enough through the winter months and ranks them by climate. For a single month, the "Warm sea in" ranking is a useful companion.
Look beyond the water temperature
A warm sea alone doesn't make a beach day. Check the daytime temperature and rainy days too — and, honestly, whether you actually want extreme heat. A place can have a warm sea and still be too hot by day. How we calculate the values is spelled out in the methodology; everything is a historical average, not a forecast.
The fastest way to combine these criteria is the climate finder: pick the month, your desired temperature, rain and "warm sea", and the matching destinations line up, sorted.
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Climate values in this article are historical monthly averages (NASA POWER, NOAA OISST), not a weather forecast.