What is the current water temperature in Shimonoseki?

As of now, in Shimonoseki, the water temperature is 26.52°C. It's safe to say that the water is comfortably warm for various water-related activities.

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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.

79.7

°F

October 11, 05:34

Trend:

decreasing

Yesterday:

79.9°F

Tomorrow:

79.5°F

Sunrise:

06:18

Sunset:

17:48

Day Length:

11 h. 30 min.

Shimonoseki in October

Minimum:

54.5°F

Average:

57.5°F

Maximum:

59.0°F

Sea water temperature in Shimonoseki today

As of now, in Shimonoseki, the water temperature is 79.7°F. It's safe to say that the water is comfortably warm for various water-related activities. Today's reading is 5.2°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 fall a bit.

Recent sea temperature and forecast

Today's reading indicates a minor change compared to the average water temperature of the last two weeks, but the overall trend remains steady. It is also close to the historical maximum temperature for this date. The maximum temperature recorded for this date was 77.0°F on 2021, while the historical minimum was 71.6°F on 2015.

latest data

last year

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 78.6°F, the minimum temperature may reach 77.9°F, and the maximum might stay at 79.5°F.

Daily water temperature in Shimonoseki

Date	Current Year actual* / forecast**	last year	10 years average
Sep 27	80.5°F	79.7°F	77.4°F
Sep 28	81.1°F	81.7°F	77.5°F
Sep 29	81.2°F	81.1°F	77.5°F
Sep 30	81.7°F	80.6°F	77.2°F
Oct 1	79.6°F	79.7°F	76.6°F
Oct 2	79.4°F	79.3°F	76.4°F
Oct 3	79.0°F	78.9°F	76.4°F
Oct 4	78.5°F	78.8°F	76.1°F
Oct 5	78.2°F	78.3°F	76.0°F
Oct 6	78.0°F	77.9°F	75.7°F
Oct 7	78.9°F	77.5°F	75.6°F
Oct 8	81.0°F	77.0°F	75.6°F
Oct 9	79.4°F	76.6°F	75.3°F
Oct 10	79.9°F	76.6°F	74.6°F
Oct 11	79.7°F	76.3°F	74.5°F
Oct 12	79.5°F	76.0°F	74.3°F
Oct 13	78.9°F	75.1°F	73.7°F
Oct 14	78.9°F	75.0°F	73.7°F
Oct 15	78.6°F	75.1°F	73.4°F
Oct 16	78.5°F	75.0°F	73.3°F
Oct 17	78.2°F	75.2°F	73.0°F
Oct 18	77.9°F	75.5°F	72.7°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 September offer comfortable swimming conditions, which amounts to 112 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 57.4°F in Winter, 59.3°F in Spring, 77.5°F in Summer, and 73.3°F in Autumn.

Popular neighboring cities and resorts

City	Water temperature*	Distance**
Kitakyushu	81.1°F	9mi
Fukuoka	77.5°F	39mi
Beppu	77.2°F	57mi
Ōita	77.1°F	63mi

* current water temperature in this city

** straight line distance from Shimonoseki