What is the current water temperature in Shimonoseki?

Q: What is the current water temperature in Shimonoseki?

As of now, in Shimonoseki, the water temperature is 16.09°C. Swimming in water of this temperature is generally concidered to be cool, and most people won't really enjoy it.

Japan > Shimonoseki

Water temperature in Shimonoseki

Detailed information about the current water temperature in Shimonoseki. 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.

61.0

°F

April 14, 14:26

Trend:

stable

Yesterday:

60.8°F

Tomorrow:

60.8°F

Sunrise:

05:48

Sunset:

18:46

Day Length:

12 h. 58 min.

Shimonoseki in April

Minimum:

56.1°F

Average:

58.1°F

Maximum:

59.9°F

Sea water temperature in Shimonoseki today

As of now, in Shimonoseki, the water temperature is 61.0°F. Swimming in water of this temperature is generally concidered to be cool, and most people won't really enjoy it. Today's reading is 2.6°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 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 60.2°F on 2022, while the historical minimum was 56.8°F on 2017.

latest data

last year

Over the last two weeks, the water temperature has stayed slightly above than historical averages for those days. The forecast for the upcoming week suggests a gradual increase. The average temperature is expected to rise up to 61.5°F, with minimum temperature starting at 60.8°F, while the maximum might reach 62.3°F.

Daily water temperature in Shimonoseki

Date	Current Year actual* / forecast**	last year	10 years average
Mar 31	56.6°F	56.4°F	56.3°F
Apr 1	56.6°F	56.4°F	56.6°F
Apr 2	57.5°F	56.1°F	56.8°F
Apr 3	57.3°F	54.8°F	56.7°F
Apr 4	57.7°F	54.6°F	56.8°F
Apr 5	58.0°F	54.2°F	57.1°F
Apr 6	58.1°F	54.9°F	57.2°F
Apr 7	59.4°F	55.2°F	57.4°F
Apr 8	58.4°F	55.8°F	57.5°F
Apr 9	58.3°F	57.1°F	57.7°F
Apr 10	58.5°F	57.3°F	58.1°F
Apr 11	58.1°F	57.2°F	57.8°F
Apr 12	58.4°F	57.5°F	57.9°F
Apr 13	60.8°F	58.7°F	58.2°F
Apr 14	61.0°F	58.0°F	58.4°F
Apr 15	60.8°F	57.2°F	58.2°F
Apr 16	61.0°F	57.0°F	58.4°F
Apr 17	61.4°F	57.6°F	58.9°F
Apr 18	61.6°F	58.2°F	59.0°F
Apr 19	61.5°F	58.7°F	58.9°F
Apr 20	61.9°F	58.9°F	59.3°F
Apr 21	62.3°F	60.5°F	59.7°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 Shimonoseki by month

In Shimonoseki, the months July through October offer comfortable swimming conditions, which amounts to 116 swimming days.

The warmest water in Shimonoseki was recorded on September 2, 2025, reaching a 86.9°F. While the coldest temperature occurred on March 10, 2025, dipping to 48.5°F. The average readings by season are 57.3°F in Winter, 59.4°F in Spring, 77.7°F in Summer, and 73.6°F in Autumn.

Popular neighboring cities and resorts

City	Water temperature*	Distance**
Kitakyushu	60.6°F	9mi
Fukuoka	60.3°F	39mi
Beppu	60.3°F	57mi
Ōita	61.1°F	63mi

* current water temperature in this city

** straight line distance from Shimonoseki