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

77.9

°F

September 18, 11:17

Trend:

stable

Yesterday:

77.2°F

Tomorrow:

77.8°F

Sunrise:

06:17

Sunset:

18:38

Day Length:

12 h. 21 min.

Incheon in September

Minimum:

38.5°F

Average:

40.6°F

Maximum:

44.3°F

Sea water temperature in Incheon today

As of now, in Incheon, the water temperature is 77.9°F. It's safe to say that the water is comfortably warm for various water-related activities. Today's reading is 1.9°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 stay about the same.

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 81.9°F on 2024, while the historical minimum was 74.2°F on 2015.

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 76.8°F, the minimum temperature may reach 75.7°F, and the maximum might stay at 77.8°F.

Daily water temperature in Incheon

Date Current Year

actual* / forecast**

last year 10 years average
Sep 4 81.2°F 81.2°F 77.8°F
Sep 5 81.6°F 81.3°F 77.7°F
Sep 6 82.1°F 80.7°F 77.7°F
Sep 7 82.0°F 80.3°F 77.5°F
Sep 8 80.6°F 79.7°F 76.9°F
Sep 9 80.0°F 80.7°F 76.9°F
Sep 10 80.6°F 81.3°F 76.9°F
Sep 11 80.0°F 80.7°F 76.8°F
Sep 12 79.5°F 80.2°F 76.5°F
Sep 13 79.0°F 79.7°F 76.3°F
Sep 14 78.6°F 79.5°F 76.1°F
Sep 15 77.3°F 80.7°F 76.0°F
Sep 16 77.9°F 80.3°F 75.8°F
Sep 17 77.2°F 79.7°F 75.3°F
Sep 18 77.9°F 81.9°F 75.9°F
Sep 19 77.8°F 82.2°F 75.8°F
Sep 20 77.5°F 81.3°F 75.6°F
Sep 21 77.1°F 80.5°F 75.2°F
Sep 22 76.8°F 80.6°F 74.9°F
Sep 23 76.4°F 79.2°F 74.5°F
Sep 24 76.0°F 78.5°F 74.1°F
Sep 25 75.7°F 77.6°F 73.8°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 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 78.0°F 5mi
Ansan-si 76.5°F 11mi
Anyang-si 76.2°F 13mi
Goyang-si 74.9°F 16mi
Hwaseong-si 76.5°F 18mi

* current water temperature in this city

** straight line distance from Incheon