All data are in degrees Fahrenheit

en

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.
Sea temperature in Shimonoseki now

71.0

°F

November 1, 03:19

Trend:

decreasing

Yesterday:

71.4°F

Tomorrow:

70.7°F

Sunrise:

06:35

Sunset:

17:24

Day Length:

10 h. 49 min.

Shimonoseki in November

Minimum:

55.1°F

Average:

57.4°F

Maximum:

58.8°F

Sea water temperature in Shimonoseki today

As of now, in Shimonoseki, the water temperature is 71.0°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 1.2°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 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 72.7°F on 2024, while the historical minimum was 68.4°F on 2015.

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 70.2°F, the minimum temperature may reach 69.6°F, and the maximum might stay at 70.7°F.

Daily water temperature in Shimonoseki

Date Current Year

actual* / forecast**

last year 10 years average
Oct 18 78.0°F 75.5°F 73.2°F
Oct 19 77.7°F 75.7°F 73.0°F
Oct 20 77.1°F 75.8°F 72.9°F
Oct 21 77.1°F 75.6°F 72.8°F
Oct 22 76.5°F 74.9°F 72.5°F
Oct 23 75.1°F 75.0°F 72.3°F
Oct 24 75.1°F 74.3°F 71.9°F
Oct 25 73.7°F 73.9°F 71.6°F
Oct 26 73.7°F 73.8°F 71.2°F
Oct 27 73.4°F 73.7°F 71.1°F
Oct 28 72.8°F 73.8°F 70.9°F
Oct 29 72.1°F 73.6°F 70.8°F
Oct 30 71.5°F 73.0°F 70.6°F
Oct 31 71.4°F 73.1°F 70.2°F
Nov 1 71.0°F 72.7°F 69.8°F
Nov 2 70.7°F 72.4°F 69.5°F
Nov 3 70.5°F 71.5°F 69.3°F
Nov 4 70.2°F 70.6°F 69.0°F
Nov 5 70.1°F 70.3°F 68.9°F
Nov 6 70.1°F 70.8°F 68.9°F
Nov 7 69.9°F 70.5°F 68.7°F
Nov 8 69.6°F 70.1°F 68.4°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 71.1°F 9mi
Fukuoka 70.7°F 39mi
Beppu 73.0°F 57mi
Ōita 72.9°F 63mi

* current water temperature in this city

** straight line distance from Shimonoseki