All data are in degrees Fahrenheit

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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.
Sea temperature in Jeju City now

61.8

°F

January 9, 03:51

Trend:

stable

Yesterday:

61.8°F

Tomorrow:

61.6°F

Sunrise:

07:39

Sunset:

17:43

Day Length:

10 h. 4 min.

Jeju City in January

Minimum:

59.6°F

Average:

61.2°F

Maximum:

63.3°F

Sea water temperature in Jeju City today

As of now, in Jeju City, the water temperature is 61.8°F. Swimming in water of this temperature is generally concidered to be cool, and most people won't really enjoy it. Today's reading is 1.0°F higher than the average recorded on this particular day in recent years. The sea temperature remains approximately unchanged from yesterday. According to the forecast, we expect the temperature to fall a bit.

Recent sea temperature and forecast

Today's water temperature is considerably lower than the average registered over the last two weeks, indicating a slight cooling trend. It is also close to the historical maximum temperature for this date. The maximum temperature recorded for this date was 62.0°F on 2023, while the historical minimum was 59.4°F on 2018.

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 shows a gradual cooling trend. The average temperature is expected to be 61.2°F, the minimum temperature may reach 60.9°F, and the maximum might stay at 61.6°F.

Daily water temperature in Jeju City

Date Current Year

actual* / forecast**

last year 10 years average
Jan 1 63.3°F 60.8°F 61.2°F
Jan 2 62.9°F 60.1°F 61.0°F
Jan 3 62.6°F 60.1°F 61.0°F
Jan 4 62.6°F 60.2°F 61.1°F
Jan 5 62.2°F 59.7°F 60.9°F
Jan 6 62.1°F 60.2°F 60.9°F
Jan 7 61.9°F 60.4°F 60.9°F
Jan 8 61.8°F 60.4°F 60.8°F
Jan 9 61.8°F 60.2°F 60.8°F
Jan 10 61.6°F 60.2°F 60.6°F
Jan 11 61.5°F 60.2°F 60.5°F
Jan 12 61.3°F 59.6°F 60.4°F
Jan 13 61.2°F 59.8°F 60.2°F
Jan 14 61.1°F 59.2°F 60.1°F
Jan 15 61.1°F 59.1°F 60.1°F
Jan 16 60.9°F 59.1°F 59.9°F
Dec 26 64.1°F 61.5°F 62.1°F
Dec 27 63.7°F 61.4°F 61.9°F
Dec 28 63.1°F 61.0°F 61.9°F
Dec 29 63.5°F 61.0°F 61.8°F
Dec 30 63.6°F 60.9°F 61.7°F
Dec 31 63.6°F 60.9°F 61.6°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 60.2°F in Winter, 59.7°F in Spring, 75.9°F in Summer, and 72.9°F in Autumn.