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Water temperature in Tokyo

Detailed information about the current water temperature in Tokyo. 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 Tokyo now

56.0

°F

December 26, 17:06

Trend:

stable

Yesterday:

55.7°F

Tomorrow:

55.9°F

Sunrise:

06:49

Sunset:

16:34

Day Length:

9 h. 45 min.

Tokyo in January

Minimum:

52.2°F

Average:

55.5°F

Maximum:

59.3°F

Sea water temperature in Tokyo today

As of now, in Tokyo, the water temperature is 56.0°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 0.9°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 stay about the same.

Recent sea temperature and forecast

Today's water temperature is slightly 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 60.6°F on 2015, while the historical minimum was 54.8°F on 2021.

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 shows a gradual cooling trend. The average temperature is expected to be 55.0°F, the minimum temperature may reach 54.4°F, and the maximum might stay at 55.9°F.

Daily water temperature in Tokyo

Date Current Year

actual* / forecast**

 last year 10 years average
Jan 1 54.7°F 55.5°F 55.5°F
Jan 2 54.4°F 54.3°F 55.3°F
Dec 12 60.3°F 59.0°F 59.4°F
Dec 13 58.4°F 58.4°F 58.9°F
Dec 14 58.4°F 58.2°F 58.9°F
Dec 15 57.4°F 59.0°F 58.9°F
Dec 16 58.2°F 58.7°F 58.8°F
Dec 17 58.7°F 57.7°F 58.9°F
Dec 18 56.4°F 57.9°F 58.5°F
Dec 19 56.3°F 57.2°F 57.9°F
Dec 20 55.2°F 57.5°F 57.5°F
Dec 21 55.7°F 57.1°F 57.2°F
Dec 22 55.9°F 56.9°F 57.5°F
Dec 23 54.5°F 56.8°F 57.3°F
Dec 24 55.1°F 56.0°F 57.0°F
Dec 25 55.7°F 56.1°F 56.9°F
Dec 26 56.0°F 55.7°F 56.8°F
Dec 27 55.9°F 56.2°F 56.8°F
Dec 28 55.4°F 55.9°F 56.3°F
Dec 29 55.2°F 56.1°F 56.0°F
Dec 30 54.8°F 56.4°F 55.7°F
Dec 31 54.6°F 56.0°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 Tokyo by month

January

February

March

April

May

June

July

August

September

October

November

December

In Tokyo, the months July through September offer comfortable swimming conditions, which amounts to 105 swimming days.
The warmest water in Tokyo was recorded on July 30, 2024, reaching a 88.2°F. While the coldest temperature occurred on February 15, 2022, dipping to 47.3°F. The average readings by season are 55.0°F in Winter, 60.2°F in Spring, 77.6°F in Summer, and 71.7°F in Autumn.

Popular neighboring cities and resorts

City Water temperature* Distance**
Kawasaki 55.9°F 12mi
Matsudo 52.0°F 13mi
Honchō 52.0°F 17mi
Yokohama 56.4°F 18mi
Chiba 54.3°F 25mi
Ichihara 55.1°F 25mi
Kisarazu 57.1°F 25mi
Kimitsu 56.8°F 25mi
Fujisawa 64.0°F 26mi
Futtsu 57.8°F 27mi

* current water temperature in this city

** straight line distance from Tokyo