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

75.1

°F

July 7, 20:49

Trend:

increasing

Yesterday:

75.0°F

Tomorrow:

75.4°F

Sunrise:

04:31

Sunset:

19:00

Day Length:

14 h. 29 min.

Tokyo in July

Minimum:

52.6°F

Average:

54.2°F

Maximum:

58.0°F

Sea water temperature in Tokyo today

As of now, in Tokyo, the water temperature is 75.1°F. It's safe to say that the water is comfortably warm for various water-related activities. Today's reading is 2.3°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

Today's water temperature is notably higher than the average recorded over the past two weeks, indicating a significant warming trend. It is also close to the historical minimum temperature for this date. The maximum temperature recorded for this date was 82.1°F on 2025, while the historical minimum was 74.5°F on 2019.

Over the last two weeks, the water temperature has stayed slightly lower than historical averages for those days. The forecast for the upcoming week suggests a gradual increase. The average temperature is expected to rise up to 75.8°F, with minimum temperature starting at 75.4°F, while the maximum might reach 76.0°F.

Daily water temperature in Tokyo

Date Current Year

actual* / forecast**

last year 10 years average
Jun 23 72.7°F 77.0°F 72.9°F
Jun 24 72.6°F 77.0°F 73.1°F
Jun 25 73.1°F 76.4°F 73.1°F
Jun 26 72.3°F 79.1°F 74.0°F
Jun 27 71.9°F 79.2°F 74.1°F
Jun 28 72.9°F 79.0°F 74.8°F
Jun 29 73.1°F 79.6°F 75.0°F
Jun 30 72.6°F 79.7°F 75.1°F
Jul 1 74.2°F 81.0°F 75.8°F
Jul 2 74.8°F 79.8°F 76.2°F
Jul 3 74.9°F 77.1°F 76.1°F
Jul 4 75.0°F 77.3°F 76.6°F
Jul 5 75.0°F 80.1°F 77.1°F
Jul 6 75.0°F 80.0°F 77.1°F
Jul 7 75.1°F 82.1°F 77.4°F
Jul 8 75.4°F 83.0°F 77.7°F
Jul 9 75.8°F 83.7°F 78.0°F
Jul 10 75.6°F 82.8°F 77.9°F
Jul 11 75.8°F 82.3°F 78.1°F
Jul 12 76.0°F 81.9°F 78.3°F
Jul 13 75.8°F 81.5°F 78.1°F
Jul 14 76.0°F 81.5°F 78.3°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 74.8°F 12mi
Matsudo 75.4°F 13mi
Honchō 75.4°F 17mi
Yokohama 74.5°F 18mi
Chiba 75.2°F 25mi
Ichihara 75.1°F 25mi
Kisarazu 74.5°F 25mi
Kimitsu 74.4°F 25mi
Fujisawa 74.3°F 26mi
Futtsu 74.1°F 27mi

* current water temperature in this city

** straight line distance from Tokyo