Jeju Island Sea Temperature
South Korea · Updated hourly from satellite and marine data
Current Sea Temperature
23.5°C
Comfortable for snorkeling
Sea Surface Temperature Over the Year
Sea surface temperature in Jeju Island ranges from about 22.9°C in June to 22.9°C in June. The water is warmest in late summer and coolest in winter.
Over the past 30 days, the average sea temperature in Jeju Island has been 22.9°C.
Monthly Water Temperature Averages
| Month | Min | Average | Max |
|---|---|---|---|
| Jun | — | — | — |
Based on recent forecast data collected for Jeju Island.
Jeju Island Water Temperature — Common Questions
What is the sea temperature in Jeju Island today?
The current sea surface temperature in Jeju Island is 23.5°C. Over the last 30 days, the average has been 22.9°C.
When is the water warmest in Jeju Island?
The warmest sea temperatures in Jeju Island occur in June, averaging around 22.9°C. Late summer typically brings the warmest water, ideal for snorkeling without a wetsuit.
When is the water coldest in Jeju Island?
The coldest sea temperatures are in June, averaging around 22.9°C.
Can you swim in Jeju Island today?
Yes — at 23.5°C the water is warm enough for comfortable swimming and snorkeling.
Full Snorkeling Forecast
See how today's sea temperature, wave height, wind, and tides combine into a detailed snorkeling score for Jeju Island.
View Snorkel Forecast →