Warmest sea right now — a live ranking of the top 15, updated every day from Open-Meteo data.
Qatar tops the ranking at 36°, ahead of Bahrain and Brunei. The average across the top 15 is 32°.
°C · Updated daily · Open-Meteo
Sea surface temperature shapes swimming comfort and the holiday season. Around 24–28 °C is ideal for bathing; below 20 °C most swimmers find the water cool.