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 10.99°C. Swimming in water of this temperature is considered as extremely cold, and there's a substantial risk of hypothermia if exposed for more than a brief duration.

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.

51.8

°F

March 15, 12:06

Trend:

stable

Yesterday:

51.9°F

Tomorrow:

52.1°F

Sunrise:

06:28

Sunset:

18:23

Day Length:

11 h. 55 min.

Shimonoseki in March

Minimum:

56.4°F

Average:

58.0°F

Maximum:

59.6°F

Sea water temperature in Shimonoseki today

As of now, in Shimonoseki, the water temperature is 51.8°F. Swimming in water of this temperature is considered as extremely cold, and there's a substantial risk of hypothermia if exposed for more than a brief duration. Today's reading is 2.6°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 rise a bit.

Recent sea temperature and forecast

The water temperature today is above average for the last two weeks, showing a small increase in temperature. It is also close to the historical minimum temperature for this date. The maximum temperature recorded for this date was 55.9°F on 2016, while the historical minimum was 53.2°F on 2021.

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 52.5°F, with minimum temperature starting at 52.1°F, while the maximum might reach 52.9°F.

Daily water temperature in Shimonoseki

Date	Current Year actual* / forecast**	last year	10 years average
Mar 1	52.2°F	53.1°F	53.6°F
Mar 2	52.3°F	53.3°F	53.8°F
Mar 3	52.8°F	53.1°F	53.8°F
Mar 4	52.9°F	53.1°F	54.0°F
Mar 5	53.0°F	53.2°F	53.9°F
Mar 6	53.1°F	53.3°F	54.0°F
Mar 7	52.8°F	53.2°F	53.7°F
Mar 8	52.9°F	52.9°F	53.5°F
Mar 9	49.4°F	52.6°F	53.2°F
Mar 10	48.5°F	53.0°F	53.3°F
Mar 11	49.5°F	52.5°F	53.5°F
Mar 12	49.6°F	53.0°F	53.7°F
Mar 13	51.5°F	53.8°F	54.1°F
Mar 14	51.9°F	54.1°F	54.5°F
Mar 15	51.8°F	53.3°F	54.4°F
Mar 16	52.1°F	52.7°F	54.6°F
Mar 17	52.2°F	53.8°F	54.8°F
Mar 18	52.4°F	54.1°F	55.0°F
Mar 19	52.6°F	54.3°F	55.1°F
Mar 20	52.7°F	53.9°F	55.3°F
Mar 21	52.9°F	55.5°F	55.5°F
Mar 22	52.9°F	54.2°F	55.5°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, 59.4°F in Spring, 77.4°F in Summer, and 73.1°F in Autumn.

Popular neighboring cities and resorts

City	Water temperature*	Distance**
Kitakyushu	51.3°F	9mi
Fukuoka	53.5°F	39mi
Beppu	59.0°F	57mi
Ōita	58.3°F	63mi

* current water temperature in this city

** straight line distance from Shimonoseki