# Jeju Island water temperature

Sea temperature at Jeju Island is 26.8 °C (80.2 °F).

- Location: Jeju Island, South Korea
- Timezone: Asia/Seoul
- Source: Open-Meteo marine forecast (snapshot)
- Generated at: 2026-09-24T21:54:15.333798+09:00
- Forecast page: https://snorkelforecast.com/south-korea/jeju-island/
- HTML sea temperature: https://snorkelforecast.com/south-korea/jeju-island/sea-temperature/
- Temperature is not a safety rating or snorkel score.
- Guidance: Warm water
- What to wear: Most people are comfortable in swimwear or a light rash guard.

## Monthly baseline

- January: 16.7 °C (62.1 °F)
- February: 16.0 °C (60.8 °F)
- March: 15.5 °C (59.9 °F)
- April: 16.4 °C (61.5 °F)
- May: 18.2 °C (64.8 °F)
- June: 22.1 °C (71.8 °F)
- July: 26.7 °C (80.1 °F)
- August: 30.0 °C (86.0 °F)
- September: 29.2 °C (84.6 °F)
- October: 26.1 °C (79.0 °F)
- November: 22.8 °C (73.0 °F)
- December: 19.3 °C (66.7 °F)