Where is hot in May

Beaches where the sea is at least 18 °C in May – 127 destinations from 2021–2025 climatology, ranked warmest first. Pick with your eyes: every tile opens today's sea temperature and the 10-day forecast.

Warmest sea in May: Railay Beach (30.8 °C), Sao Beach (30.8 °C), Ko Phi Phi Don (30.8 °C).