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 16.14°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.

61.1

°F

December 16, 06:39

Trend:

decreasing

Yesterday:

61.2°F

Tomorrow:

60.9°F

Sunrise:

07:14

Sunset:

17:09

Day Length:

9 h. 55 min.

Shimonoseki in December

Minimum:

54.5°F

Average:

57.1°F

Maximum:

58.8°F

Sea water temperature in Shimonoseki today

As of now, in Shimonoseki, the water temperature is 61.1°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 0.2°F lower 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 water temperature is considerably 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 63.2°F on 2016, while the historical minimum was 60.2°F on 2022.

latest data

last year

Over the past two weeks, the water temperature has closely aligned with historical averages for those days. The forecast for the upcoming week shows a gradual cooling trend. The average temperature is expected to be 60.4°F, the minimum temperature may reach 59.9°F, and the maximum might stay at 60.9°F.

Daily water temperature in Shimonoseki

Date	Current Year actual* / forecast**	last year	10 years average
Dec 2	64.2°F	62.5°F	63.8°F
Dec 3	64.2°F	61.0°F	63.5°F
Dec 4	63.8°F	61.4°F	63.1°F
Dec 5	63.7°F	61.6°F	63.0°F
Dec 6	63.3°F	61.2°F	62.7°F
Dec 7	61.6°F	61.2°F	62.2°F
Dec 8	62.0°F	61.0°F	62.0°F
Dec 9	61.9°F	60.9°F	62.1°F
Dec 10	62.1°F	60.7°F	61.8°F
Dec 11	62.1°F	60.8°F	61.8°F
Dec 12	62.2°F	60.6°F	61.7°F
Dec 13	61.9°F	60.4°F	61.6°F
Dec 14	61.9°F	61.1°F	61.5°F
Dec 15	61.2°F	60.9°F	61.4°F
Dec 16	61.1°F	60.7°F	61.3°F
Dec 17	60.9°F	60.2°F	61.1°F
Dec 18	60.7°F	59.9°F	60.9°F
Dec 19	60.6°F	59.6°F	60.8°F
Dec 20	60.4°F	59.9°F	60.6°F
Dec 21	60.3°F	60.5°F	60.5°F
Dec 22	60.1°F	59.6°F	60.3°F
Dec 23	59.9°F	60.0°F	60.1°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 114 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 73.4°F in Autumn.

Popular neighboring cities and resorts

City	Water temperature*	Distance**
Kitakyushu	60.4°F	9mi
Fukuoka	62.6°F	39mi
Beppu	62.4°F	57mi
Ōita	63.5°F	63mi

* current water temperature in this city

** straight line distance from Shimonoseki