All data are in degrees Fahrenheit

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Water temperature in Incheon

Detailed information about the current water temperature in Incheon. 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 Incheon now

69.6

°F

October 11, 05:27

Trend:

decreasing

Yesterday:

70.0°F

Tomorrow:

69.1°F

Sunrise:

06:37

Sunset:

18:03

Day Length:

11 h. 26 min.

Incheon in October

Minimum:

38.3°F

Average:

40.2°F

Maximum:

43.6°F

Sea water temperature in Incheon today

As of now, in Incheon, the water temperature is 69.6°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 about the same as 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 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 70.8°F on 2021, while the historical minimum was 67.8°F on 2018.

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 67.9°F, the minimum temperature may reach 67.2°F, and the maximum might stay at 69.1°F.

Daily water temperature in Incheon

Date Current Year

actual* / forecast**

last year 10 years average
Sep 27 74.8°F 76.8°F 73.4°F
Sep 28 74.5°F 76.4°F 73.1°F
Sep 29 74.0°F 75.9°F 73.0°F
Sep 30 72.9°F 75.8°F 72.7°F
Oct 1 72.8°F 75.4°F 72.5°F
Oct 2 72.5°F 75.9°F 72.2°F
Oct 3 72.0°F 74.9°F 71.6°F
Oct 4 71.6°F 74.2°F 71.4°F
Oct 5 71.3°F 73.8°F 71.3°F
Oct 6 71.0°F 72.7°F 70.9°F
Oct 7 70.6°F 72.1°F 70.6°F
Oct 8 70.3°F 71.5°F 70.2°F
Oct 9 70.3°F 70.7°F 70.3°F
Oct 10 70.0°F 70.4°F 69.9°F
Oct 11 69.6°F 70.5°F 69.5°F
Oct 12 69.1°F 70.7°F 69.0°F
Oct 13 68.4°F 70.7°F 68.3°F
Oct 14 67.9°F 70.1°F 67.7°F
Oct 15 67.8°F 69.6°F 67.7°F
Oct 16 67.6°F 69.9°F 67.5°F
Oct 17 67.4°F 69.4°F 67.3°F
Oct 18 67.2°F 69.5°F 67.0°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 Incheon by month

In Incheon, the months July through September offer comfortable swimming conditions, which amounts to 83 swimming days.
The warmest water in Incheon was recorded on August 18, 2024, reaching a 85.3°F. While the coldest temperature occurred on February 15, 2025, dipping to 33.7°F. The average readings by season are 41.2°F in Winter, 49.9°F in Spring, 74.4°F in Summer, and 67.0°F in Autumn.

Popular neighboring cities and resorts

City Water temperature* Distance**
Bucheon-si 69.9°F 5mi
Ansan-si 70.3°F 11mi
Anyang-si 70.2°F 13mi
Goyang-si 68.1°F 16mi
Hwaseong-si 70.5°F 18mi

* current water temperature in this city

** straight line distance from Incheon