All data are in degrees Fahrenheit

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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

75.3

°F

September 23, 14:51

Trend:

decreasing

Yesterday:

75.9°F

Tomorrow:

74.9°F

Sunrise:

05:29

Sunset:

17:38

Day Length:

12 h. 9 min.

Tokyo in September

Minimum:

51.7°F

Average:

53.9°F

Maximum:

57.7°F

Sea water temperature in Tokyo today

As of now, in Tokyo, the water temperature is 75.3°F. It's safe to say that the water is comfortably warm for various water-related activities. Today's reading is 2.4°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 water temperature is considerably lower than the average registered over the last two weeks, indicating a slight cooling trend. It is also close to the historical minimum temperature for this date. The maximum temperature recorded for this date was 81.8°F on 2024, while the historical minimum was 75.1°F on 2017.

Over the last two weeks, the water temperature has stayed slightly lower than historical averages for those days. The forecast for the upcoming week shows a gradual cooling trend. The average temperature is expected to be 74.0°F, the minimum temperature may reach 73.6°F, and the maximum might stay at 74.9°F.

Daily water temperature in Tokyo

Date Current Year

actual* / forecast**

last year 10 years average
Sep 9 79.6°F 83.7°F 80.8°F
Sep 10 79.1°F 84.1°F 80.8°F
Sep 11 78.9°F 83.6°F 80.5°F
Sep 12 78.8°F 83.4°F 80.6°F
Sep 13 78.7°F 82.6°F 80.3°F
Sep 14 79.7°F 82.3°F 80.3°F
Sep 15 79.4°F 82.2°F 80.1°F
Sep 16 78.8°F 82.3°F 79.6°F
Sep 17 79.8°F 82.1°F 79.3°F
Sep 18 76.3°F 83.4°F 79.4°F
Sep 19 76.1°F 82.7°F 78.9°F
Sep 20 76.5°F 82.0°F 78.9°F
Sep 21 75.9°F 82.7°F 78.9°F
Sep 22 75.9°F 81.9°F 78.3°F
Sep 23 75.3°F 79.5°F 77.6°F
Sep 24 74.9°F 77.7°F 77.3°F
Sep 25 74.5°F 77.4°F 76.9°F
Sep 26 73.7°F 77.4°F 76.1°F
Sep 27 73.7°F 77.3°F 76.1°F
Sep 28 73.6°F 76.4°F 76.0°F
Sep 29 73.7°F 77.7°F 76.1°F
Sep 30 73.8°F 77.3°F 76.2°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

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 54.7°F in Winter, 60.5°F in Spring, 77.8°F in Summer, and 71.8°F in Autumn.

Popular neighboring cities and resorts

City Water temperature* Distance**
Kawasaki 75.6°F 12mi
Matsudo 76.0°F 13mi
Honchō 76.0°F 17mi
Yokohama 75.8°F 18mi
Chiba 76.6°F 25mi
Ichihara 76.6°F 25mi
Kisarazu 76.0°F 25mi
Kimitsu 75.9°F 25mi
Fujisawa 77.3°F 26mi
Futtsu 75.9°F 27mi

* current water temperature in this city

** straight line distance from Tokyo