What is the current water temperature in Tokyo?

Q: What is the current water temperature in Tokyo?

As of now, in Tokyo, the water temperature is 22.87°C. Swimming in water of this temperature is seen as relatively warm and enjoyable for some individuals, although many might find it slightly too cool.

Japan > Tokyo

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.

73.2

°F

October 21, 20:07

Trend:

stable

Yesterday:

72.3°F

Tomorrow:

73.0°F

Sunrise:

05:52

Sunset:

16:59

Day Length:

11 h. 7 min.

Tokyo in October

Minimum:

51.7°F

Average:

54.0°F

Maximum:

57.8°F

Sea water temperature in Tokyo today

As of now, in Tokyo, the water temperature is 73.2°F. Swimming in water of this temperature is seen as relatively warm and enjoyable for some individuals, although many might find it slightly too cool. Today's reading is 3.2°F higher than the average recorded on this particular day in recent years. Since yesterday, there was a noticeable increase in temperature. This indicates a warming trend over the past day. According to the forecast, we expect the temperature to fall 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 maximum temperature for this date. The maximum temperature recorded for this date was 73.5°F on 2025, while the historical minimum was 66.8°F on 2020.

latest data

last year

Over the past two weeks, the water temperature has closely aligned with historical averages for those days. The forecast for the upcoming week shows a gradual cooling trend. The average temperature is expected to be 72.3°F, the minimum temperature may reach 71.9°F, and the maximum might stay at 73.0°F.

Daily water temperature in Tokyo

Date	Current Year actual* / forecast**	last year	10 years average
Oct 7	72.5°F	74.2°F	73.9°F
Oct 8	71.1°F	73.9°F	73.5°F
Oct 9	71.5°F	73.7°F	73.1°F
Oct 10	72.0°F	73.2°F	72.9°F
Oct 11	71.8°F	73.0°F	72.5°F
Oct 12	72.1°F	72.7°F	72.3°F
Oct 13	71.8°F	72.2°F	72.0°F
Oct 14	71.5°F	72.4°F	71.6°F
Oct 15	71.6°F	72.1°F	71.6°F
Oct 16	71.4°F	71.8°F	71.4°F
Oct 17	71.6°F	70.6°F	71.3°F
Oct 18	70.9°F	70.4°F	70.6°F
Oct 19	71.4°F	72.8°F	70.8°F
Oct 20	72.3°F	73.2°F	70.5°F
Oct 21	73.2°F	73.5°F	70.0°F
Oct 22	73.0°F	73.0°F	69.8°F
Oct 23	72.5°F	72.5°F	69.3°F
Oct 24	72.4°F	72.1°F	69.2°F
Oct 25	72.2°F	71.8°F	69.0°F
Oct 26	71.9°F	71.3°F	68.7°F
Oct 27	71.9°F	70.8°F	68.7°F
Oct 28	72.0°F	70.6°F	68.8°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	73.5°F	12mi
Matsudo	72.6°F	13mi
Honchō	72.6°F	17mi
Yokohama	73.7°F	18mi
Chiba	72.4°F	25mi
Ichihara	72.3°F	25mi
Kisarazu	73.0°F	25mi
Kimitsu	73.3°F	25mi
Fujisawa	74.8°F	26mi
Futtsu	73.6°F	27mi

* current water temperature in this city

** straight line distance from Tokyo