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 11.95°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.

53.5

°F

February 19, 08:27

Trend:

stable

Yesterday:

53.4°F

Tomorrow:

53.2°F

Sunrise:

06:58

Sunset:

18:03

Day Length:

11 h. 5 min.

Shimonoseki in February

Minimum:

56.4°F

Average:

58.1°F

Maximum:

59.7°F

Sea water temperature in Shimonoseki today

As of now, in Shimonoseki, the water temperature is 53.5°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 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 reading indicates a minor change compared to the average water temperature of the last two weeks, but the overall trend remains steady. 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 56.2°F on 2016, while the historical minimum was 51.4°F on 2018.

latest data

last year

Over the past two weeks, the water temperature has closely aligned with historical averages for those days. Over the next week, the forecast shows a steady trend, with temperatures staying close to the average of 53.2°F. Both minimum and maximum temperatures expected to be close to the average, offering a week of stable water conditions.

Daily water temperature in Shimonoseki

Date	Current Year actual* / forecast**	last year	10 years average
Feb 5	53.6°F	54.8°F	54.9°F
Feb 6	53.3°F	54.7°F	54.8°F
Feb 7	53.5°F	55.0°F	54.9°F
Feb 8	53.6°F	55.1°F	54.6°F
Feb 9	54.0°F	54.9°F	54.6°F
Feb 10	54.3°F	54.7°F	54.5°F
Feb 11	53.9°F	54.6°F	54.4°F
Feb 12	53.5°F	54.5°F	54.3°F
Feb 13	52.5°F	54.3°F	53.9°F
Feb 14	53.6°F	51.3°F	53.7°F
Feb 15	53.7°F	51.6°F	54.1°F
Feb 16	53.6°F	52.1°F	54.0°F
Feb 17	53.7°F	50.3°F	53.6°F
Feb 18	53.4°F	51.4°F	53.6°F
Feb 19	53.5°F	51.4°F	53.7°F
Feb 20	53.2°F	52.1°F	53.3°F
Feb 21	53.0°F	51.1°F	53.2°F
Feb 22	53.2°F	51.4°F	53.3°F
Feb 23	53.2°F	51.6°F	53.4°F
Feb 24	53.2°F	51.7°F	53.4°F
Feb 25	53.4°F	51.7°F	53.6°F
Feb 26	53.3°F	52.1°F	53.5°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 October offer comfortable swimming conditions, which amounts to 116 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 57.3°F in Winter, 59.3°F in Spring, 77.7°F in Summer, and 73.6°F in Autumn.

Popular neighboring cities and resorts

City	Water temperature*	Distance**
Kitakyushu	53.5°F	9mi
Fukuoka	54.1°F	39mi
Beppu	55.9°F	57mi
Ōita	55.9°F	63mi

* current water temperature in this city

** straight line distance from Shimonoseki