All data are in degrees Fahrenheit

en

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

84.3

°F

August 27, 04:51

Trend:

decreasing

Yesterday:

84.5°F

Tomorrow:

83.8°F

Sunrise:

06:04

Sunset:

19:07

Day Length:

13 h. 3 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 84.3°F. Swimming in water of this temperature is considered highly warm and would be enjoyable for everyone. At this temperature, you can comfortably engage in water-based activities for extended periods without experiencing discomfort. Today's reading is 2.5°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 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 85.7°F on 2025, while the historical minimum was 78.1°F on 2018.

The water temperature over the last two weeks displayed soome variability. While the two week average stayed close to the historical average, there were some days when the temperature was close to the histoorical minimum and others when it was close to the historical maximum. The forecast for the upcoming week shows a gradual cooling trend. The average temperature is expected to be 83.5°F, the minimum temperature may reach 82.8°F, and the maximum might stay at 83.9°F.

Daily water temperature in Jeju City

Date Current Year

actual* / forecast**

last year 10 years average
Aug 13 82.1°F 83.2°F 82.7°F
Aug 14 81.1°F 82.6°F 82.6°F
Aug 15 81.4°F 82.8°F 82.8°F
Aug 16 81.3°F 81.9°F 82.5°F
Aug 17 80.7°F 80.2°F 82.1°F
Aug 18 80.9°F 81.0°F 82.3°F
Aug 19 80.5°F 83.3°F 82.2°F
Aug 20 81.9°F 83.2°F 82.4°F
Aug 21 82.1°F 83.7°F 82.3°F
Aug 22 83.4°F 84.1°F 82.4°F
Aug 23 83.4°F 85.3°F 82.6°F
Aug 24 84.1°F 85.2°F 82.4°F
Aug 25 84.2°F 84.8°F 82.5°F
Aug 26 84.5°F 84.9°F 82.1°F
Aug 27 84.3°F 85.7°F 81.8°F
Aug 28 83.8°F 84.5°F 81.3°F
Aug 29 83.3°F 83.2°F 80.9°F
Aug 30 83.7°F 84.7°F 81.2°F
Aug 31 83.9°F 84.2°F 81.5°F
Sep 1 83.4°F 85.7°F 81.0°F
Sep 2 83.3°F 85.4°F 80.8°F
Sep 3 82.8°F 85.7°F 80.4°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 72.9°F in Autumn.