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

76.5

°F

September 20, 10:42

Trend:

stable

Yesterday:

77.1°F

Tomorrow:

76.7°F

Sunrise:

06:20

Sunset:

18:35

Day Length:

12 h. 15 min.

Jeju City in September

Minimum:

59.4°F

Average:

60.9°F

Maximum:

62.0°F

Sea water temperature in Jeju City today

As of now, in Jeju City, the water temperature is 76.5°F. It's safe to say that the water is comfortably warm for various water-related activities. Today's reading is 0.8°F lower 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 rise 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 also falls within the range of the average temperature recorded for this date, suggesting a consistent weather trend. The maximum temperature recorded for this date was 82.7°F on 2024, while the historical minimum was 72.1°F on 2020.

Over the past two weeks, the water temperature has closely aligned with historical averages for those days. The forecast for the upcoming week shows a gradual cooling trend. The average temperature is expected to be 75.8°F, the minimum temperature may reach 75.0°F, and the maximum might stay at 76.7°F.

Daily water temperature in Jeju City

Date Current Year

actual* / forecast**

last year 10 years average
Sep 6 79.5°F 83.2°F 79.8°F
Sep 7 79.7°F 85.6°F 80.0°F
Sep 8 80.9°F 85.1°F 79.5°F
Sep 9 81.4°F 83.5°F 79.5°F
Sep 10 80.9°F 83.4°F 79.4°F
Sep 11 79.3°F 82.1°F 79.0°F
Sep 12 77.6°F 81.7°F 78.7°F
Sep 13 77.1°F 84.1°F 78.7°F
Sep 14 77.5°F 82.7°F 78.2°F
Sep 15 79.7°F 83.3°F 78.6°F
Sep 16 78.6°F 83.2°F 78.5°F
Sep 17 77.3°F 83.8°F 78.3°F
Sep 18 77.3°F 83.4°F 78.1°F
Sep 19 77.1°F 83.9°F 77.9°F
Sep 20 76.5°F 82.4°F 77.3°F
Sep 21 76.7°F 82.4°F 77.5°F
Sep 22 76.5°F 82.0°F 77.3°F
Sep 23 76.0°F 80.0°F 76.8°F
Sep 24 75.7°F 79.8°F 76.5°F
Sep 25 75.4°F 79.1°F 76.2°F
Sep 26 75.2°F 78.7°F 76.0°F
Sep 27 75.0°F 78.2°F 75.8°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, 76.0°F in Summer, and 73.0°F in Autumn.