# Similan Islands water temperature

Sea temperature at Similan Islands is 29.3 °C (84.7 °F).

- Location: Similan Islands, Thailand
- Timezone: Asia/Bangkok
- Source: Open-Meteo marine forecast (snapshot)
- Generated at: 2026-09-22T21:17:26.800960+07:00
- Forecast page: https://snorkelforecast.com/thailand/similan-islands/
- HTML sea temperature: https://snorkelforecast.com/thailand/similan-islands/sea-temperature/
- Temperature is not a safety rating or snorkel score.
- Guidance: Very warm water
- What to wear: Swimwear is usually enough; a rash guard adds sun protection.

## Monthly baseline

- January: 28.9 °C (84.0 °F)
- February: 29.2 °C (84.6 °F)
- March: 29.9 °C (85.8 °F)
- April: 30.6 °C (87.1 °F)
- May: 30.8 °C (87.4 °F)
- June: 29.8 °C (85.6 °F)
- July: 29.3 °C (84.7 °F)
- August: 29.4 °C (84.9 °F)
- September: 28.8 °C (83.8 °F)
- October: 29.2 °C (84.6 °F)
- November: 29.3 °C (84.7 °F)
- December: 29.0 °C (84.2 °F)