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 19.42°C. Swimming in water of this temperature is seen as relatively warm and enjoyable for some individuals, although many might find it slightly too cool.

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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.

67.0

°F

May 31, 16:04

Trend:

increasing

Yesterday:

66.5°F

Tomorrow:

67.2°F

Sunrise:

05:07

Sunset:

19:21

Day Length:

14 h. 14 min.

Shimonoseki in June

Minimum:

56.3°F

Average:

57.9°F

Maximum:

59.8°F

Sea water temperature in Shimonoseki today

As of now, in Shimonoseki, the water temperature is 67.0°F. Swimming in water of this temperature is seen as relatively warm and enjoyable for some individuals, although many might find it slightly too cool. Today's reading is 1.6°F lower 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 rise 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 minimum temperature for this date. The maximum temperature recorded for this date was 70.5°F on 2022, while the historical minimum was 67.2°F on 2024.

latest data

last year

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 minimum recorded over the past years. The forecast for the upcoming week suggests a gradual increase. The average temperature is expected to rise up to 67.8°F, with minimum temperature starting at 67.2°F, while the maximum might reach 68.3°F.

Daily water temperature in Shimonoseki

Date	Current Year actual* / forecast**	last year	10 years average
May 17	63.7°F	64.2°F	64.6°F
May 18	64.7°F	65.8°F	65.3°F
May 19	64.9°F	65.0°F	65.2°F
May 20	65.3°F	65.4°F	65.5°F
May 21	65.5°F	65.1°F	65.7°F
May 22	65.6°F	66.3°F	66.0°F
May 23	65.7°F	66.4°F	66.5°F
May 24	65.9°F	66.7°F	66.5°F
May 25	65.9°F	67.4°F	67.1°F
May 26	65.7°F	67.4°F	67.6°F
May 27	63.5°F	67.7°F	67.4°F
May 28	66.3°F	67.8°F	67.9°F
May 29	66.3°F	65.9°F	67.7°F
May 30	66.5°F	66.9°F	68.1°F
May 31	67.0°F	67.2°F	68.5°F
Jun 1	67.2°F	67.5°F	68.8°F
Jun 2	67.2°F	68.4°F	68.7°F
Jun 3	67.8°F	70.0°F	69.4°F
Jun 4	67.9°F	68.8°F	69.5°F
Jun 5	68.0°F	68.7°F	69.6°F
Jun 6	68.1°F	69.0°F	69.7°F
Jun 7	68.3°F	69.1°F	69.8°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 August 8, 2024, reaching a 86.8°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, 77.4°F in Summer, and 73.1°F in Autumn.

Popular neighboring cities and resorts

City	Water temperature*	Distance**
Kitakyushu	66.4°F	9mi
Fukuoka	67.7°F	39mi
Beppu	66.4°F	57mi
Ōita	65.9°F	63mi

* current water temperature in this city

** straight line distance from Shimonoseki