All data are in degrees Fahrenheit

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Water temperature in Ulsan

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

76.4

°F

September 16, 10:09

Trend:

decreasing

Yesterday:

76.7°F

Tomorrow:

76.0°F

Sunrise:

06:06

Sunset:

18:30

Day Length:

12 h. 24 min.

Ulsan in September

Minimum:

56.0°F

Average:

58.2°F

Maximum:

61.0°F

Sea water temperature in Ulsan today

As of now, in Ulsan, the water temperature is 76.4°F. It's safe to say that the water is comfortably warm for various water-related activities. 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 slightly lower than the average registered over the last two weeks, indicating a slight cooling trend. It also aligns closely with the historical average temperature for this date, indicating a typical climate pattern. The maximum temperature recorded for this date was 82.9°F on 2024, while the historical minimum was 72.2°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 75.6°F, the minimum temperature may reach 75.2°F, and the maximum might stay at 76.0°F.

Daily water temperature in Ulsan

Date Current Year

actual* / forecast**

last year 10 years average
Sep 2 79.9°F 81.0°F 78.1°F
Sep 3 76.3°F 80.5°F 77.6°F
Sep 4 76.0°F 80.1°F 77.4°F
Sep 5 74.6°F 80.0°F 77.4°F
Sep 6 76.5°F 81.0°F 77.6°F
Sep 7 79.2°F 80.5°F 77.6°F
Sep 8 80.2°F 81.3°F 77.6°F
Sep 9 77.9°F 80.0°F 77.3°F
Sep 10 75.4°F 81.3°F 77.0°F
Sep 11 75.1°F 81.9°F 76.9°F
Sep 12 76.0°F 81.9°F 76.9°F
Sep 13 76.2°F 81.8°F 76.7°F
Sep 14 77.1°F 83.3°F 76.9°F
Sep 15 76.7°F 83.7°F 76.7°F
Sep 16 76.4°F 82.9°F 76.5°F
Sep 17 76.0°F 82.1°F 76.1°F
Sep 18 76.0°F 83.4°F 76.1°F
Sep 19 75.9°F 84.3°F 76.0°F
Sep 20 75.6°F 82.8°F 75.7°F
Sep 21 75.4°F 82.0°F 75.5°F
Sep 22 75.3°F 81.4°F 75.4°F
Sep 23 75.2°F 81.0°F 75.3°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 Ulsan by month

In Ulsan, the months July through September offer comfortable swimming conditions, which amounts to 83 swimming days.
The warmest water in Ulsan was recorded on August 18, 2024, reaching a 85.3°F. While the coldest temperature occurred on March 1, 2025, dipping to 52.5°F. The average readings by season are 58.1°F in Winter, 58.4°F in Spring, 74.2°F in Summer, and 71.1°F in Autumn.

Popular neighboring cities and resorts

City Water temperature* Distance**
Pohang 73.9°F 34mi
Busan 78.6°F 34mi
Changwon 74.0°F 42mi

* current water temperature in this city

** straight line distance from Ulsan