What is the current water temperature in Jeju City?

Q: What is the current water temperature in Jeju City?

As of now, in Jeju City, the water temperature is 21.65°C. Swimming in water of this temperature is seen as relatively warm and enjoyable for some individuals, although many might find it slightly too cool.

South Korea > Jeju City

Water temperature in Jeju City

Detailed information about the current water temperature in Jeju City. The trend over the last two weeks, daily averages, and precise forecast of the water temperature changes. Gain a deeper understanding of seasonal dynamics with monthly statistical analyses covering recent years.

71.0

°F

June 6, 05:10

Trend:

stable

Yesterday:

70.6°F

Tomorrow:

70.6°F

Sunrise:

05:24

Sunset:

19:41

Day Length:

14 h. 17 min.

Jeju City in June

Minimum:

59.6°F

Average:

60.9°F

Maximum:

62.1°F

Sea water temperature in Jeju City today

As of now, in Jeju City, the water temperature is 71.0°F. Swimming in water of this temperature is seen as relatively warm and enjoyable for some individuals, although many might find it slightly too cool. Today's reading is 4.8°F higher than the average recorded on this particular day in recent years. Since yesterday, there was a slight increase in temperature. This indicates a warming trend over the past day. According to the forecast, we expect the temperature to fall a bit.

Recent sea temperature and forecast

Today's water temperature is notably higher than the average recorded over the past two weeks, indicating a significant warming trend. It is also close to the historical maximum temperature for this date. The maximum temperature recorded for this date was 68.5°F on 2023, while the historical minimum was 64.6°F on 2025.

latest data

last year

Observations from the last two weeks indicate that the water temperature was in proximity to the highest values recorded on those days in the past. The forecast for the upcoming week suggests a gradual increase. The average temperature is expected to rise up to 71.5°F, with minimum temperature starting at 70.6°F, while the maximum might reach 72.7°F.

Daily water temperature in Jeju City

Date	Current Year actual* / forecast**	last year	10 years average
May 23	65.3°F	61.4°F	63.6°F
May 24	65.8°F	61.7°F	63.9°F
May 25	66.4°F	61.8°F	64.1°F
May 26	67.4°F	62.1°F	64.1°F
May 27	67.8°F	61.6°F	64.0°F
May 28	68.7°F	63.0°F	64.7°F
May 29	68.3°F	63.0°F	64.8°F
May 30	68.8°F	61.1°F	64.6°F
May 31	69.2°F	62.8°F	65.0°F
Jun 1	68.6°F	63.3°F	65.3°F
Jun 2	68.5°F	64.0°F	65.1°F
Jun 3	67.4°F	63.7°F	65.4°F
Jun 4	67.8°F	63.2°F	65.8°F
Jun 5	70.6°F	64.1°F	65.8°F
Jun 6	71.0°F	64.6°F	66.2°F
Jun 7	70.6°F	64.9°F	65.8°F
Jun 8	70.7°F	65.0°F	65.9°F
Jun 9	71.2°F	65.3°F	66.4°F
Jun 10	71.6°F	65.4°F	66.8°F
Jun 11	71.7°F	65.9°F	66.9°F
Jun 12	72.3°F	66.2°F	67.5°F
Jun 13	72.7°F	66.6°F	67.9°F

* actual - actual temperature values

** forecast - projected values for the next week

Real-time coastal temperatures could deviate by several degrees from the provided readings. These deviations often become evident following intense rainfall or strong winds.

Our forecasting methodology leverages a mathematical model, that uses current water and weather conditions, historical records, wind intensity and direction.

Sea water temperature in Jeju City by month

In Jeju City, the months July through September offer comfortable swimming conditions, which amounts to 106 swimming days.

The warmest water in Jeju City was recorded on August 14, 2016, reaching a 86.5°F. While the coldest temperature occurred on March 6, 2025, dipping to 54.9°F. The average readings by season are 60.3°F in Winter, 59.8°F in Spring, 75.9°F in Summer, and 72.9°F in Autumn.