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

76.9

°F

September 26, 01:56

Trend:

stable

Yesterday:

77.3°F

Tomorrow:

77.0°F

Sunrise:

06:13

Sunset:

18:15

Day Length:

12 h. 2 min.

Ulsan in October

Minimum:

55.3°F

Average:

58.4°F

Maximum:

60.9°F

Sea water temperature in Ulsan today

As of now, in Ulsan, the water temperature is 76.9°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. The sea temperature remains approximately unchanged from yesterday. 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 is also close to the historical maximum temperature for this date. The maximum temperature recorded for this date was 78.7°F on 2024, while the historical minimum was 72.4°F on 2020.

Over the last two weeks, the water temperature has stayed slightly above than historical averages for those days. Over the next week, the forecast shows a steady trend, with temperatures staying close to the average of 76.7°F. Both minimum and maximum temperatures expected to be close to the average, offering a week of stable water conditions.

Daily water temperature in Ulsan

Date Current Year

actual* / forecast**

last year 10 years average
Sep 12 79.7°F 76.0°F 77.5°F
Sep 13 77.7°F 76.2°F 77.1°F
Sep 14 78.7°F 77.1°F 77.3°F
Sep 15 77.7°F 76.7°F 77.0°F
Sep 16 78.6°F 77.7°F 77.0°F
Sep 17 78.3°F 78.6°F 76.7°F
Sep 18 77.8°F 78.2°F 76.7°F
Sep 19 77.6°F 77.1°F 76.5°F
Sep 20 78.2°F 77.0°F 76.2°F
Sep 21 77.4°F 76.4°F 75.9°F
Sep 22 77.4°F 76.7°F 75.8°F
Sep 23 77.9°F 76.6°F 75.8°F
Sep 24 78.2°F 77.1°F 75.7°F
Sep 25 77.3°F 77.2°F 75.3°F
Sep 26 76.9°F 77.8°F 75.0°F
Sep 27 77.0°F 76.9°F 75.1°F
Sep 28 77.2°F 77.9°F 75.3°F
Sep 29 77.1°F 76.6°F 75.2°F
Sep 30 76.7°F 75.0°F 74.8°F
Oct 1 76.5°F 75.5°F 74.6°F
Oct 2 76.2°F 75.6°F 74.2°F
Oct 3 75.9°F 75.2°F 74.0°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 Ulsan by month

In Ulsan, the months July through September offer comfortable swimming conditions, which amounts to 93 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 58.2°F in Winter, 58.6°F in Spring, 74.5°F in Summer, and 71.5°F in Autumn.

Popular neighboring cities and resorts

City Water temperature* Distance**
Pohang 78.6°F 34mi
Busan 76.7°F 34mi
Changwon 76.6°F 42mi

* current water temperature in this city

** straight line distance from Ulsan