All data are in degrees Fahrenheit

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Water temperature in Yokosuka

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

56.2

°F

March 17, 19:41

Trend:

increasing

Yesterday:

55.5°F

Tomorrow:

56.5°F

Sunrise:

05:51

Sunset:

17:50

Day Length:

11 h. 59 min.

Yokosuka in March

Minimum:

56.4°F

Average:

60.2°F

Maximum:

62.1°F

Sea water temperature in Yokosuka today

As of now, in Yokosuka, the water temperature is 56.2°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 rise a bit.

Recent sea temperature and forecast

The water temperature today is above average for the last two weeks, showing a small increase in temperature. 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 59.2°F on 2019, while the historical minimum was 54.6°F on 2025.

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 suggests a gradual increase. The average temperature is expected to rise up to 57.1°F, with minimum temperature starting at 56.4°F, while the maximum might reach 57.8°F.

Daily water temperature in Yokosuka

Date Current Year

actual* / forecast**

last year 10 years average
Mar 3 53.0°F 55.7°F 57.1°F
Mar 4 57.6°F 56.2°F 57.4°F
Mar 5 57.4°F 56.7°F 57.4°F
Mar 6 53.7°F 57.1°F 57.1°F
Mar 7 57.9°F 54.2°F 57.2°F
Mar 8 53.8°F 55.1°F 56.7°F
Mar 9 54.7°F 57.2°F 57.2°F
Mar 10 56.2°F 58.0°F 57.5°F
Mar 11 55.1°F 57.8°F 57.2°F
Mar 12 55.2°F 57.8°F 56.8°F
Mar 13 55.6°F 57.8°F 57.0°F
Mar 14 55.8°F 57.0°F 57.1°F
Mar 15 55.1°F 54.8°F 56.7°F
Mar 16 55.5°F 55.5°F 56.6°F
Mar 17 56.2°F 54.6°F 57.1°F
Mar 18 56.5°F 55.3°F 57.4°F
Mar 19 56.4°F 56.0°F 57.3°F
Mar 20 56.9°F 58.3°F 57.8°F
Mar 21 57.3°F 58.4°F 58.3°F
Mar 22 57.5°F 57.3°F 58.4°F
Mar 23 57.8°F 55.7°F 58.7°F
Mar 24 57.7°F 56.6°F 58.6°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 Yokosuka by month

In Yokosuka, the months July through September offer comfortable swimming conditions, which amounts to 104 swimming days.
The warmest water in Yokosuka was recorded on August 13, 2023, reaching a 84.7°F. While the coldest temperature occurred on March 2, 2026, dipping to 51.8°F. The average readings by season are 59.7°F in Winter, 61.1°F in Spring, 76.2°F in Summer, and 72.7°F in Autumn.

Popular neighboring cities and resorts

City Water temperature* Distance**
Futtsu 56.2°F 9mi
Yokohama 56.3°F 10mi
Fujisawa 58.4°F 12mi
Kimitsu 56.0°F 12mi
Kisarazu 56.0°F 16mi
Kawasaki 55.3°F 17mi
Tokyo 54.1°F 28mi
Ichihara 56.8°F 28mi
Odawara 58.9°F 29mi
Chiba 56.1°F 33mi

* current water temperature in this city

** straight line distance from Yokosuka