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

77.5

°F

September 12, 05:25

Trend:

decreasing

Yesterday:

77.7°F

Tomorrow:

77.4°F

Sunrise:

05:21

Sunset:

17:54

Day Length:

12 h. 33 min.

Yokosuka in September

Minimum:

57.3°F

Average:

59.3°F

Maximum:

61.2°F

Sea water temperature in Yokosuka today

As of now, in Yokosuka, the water temperature is 77.5°F. It's safe to say that the water is comfortably warm for various water-related activities. Today's reading is 1.7°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 83.5°F on 2024, while the historical minimum was 76.9°F on 2022.

Over the past two weeks, the water temperature has closely aligned with historical averages for those days. Over the next week, the forecast shows a steady trend, with temperatures staying close to the average of 77.2°F. Both minimum and maximum temperatures expected to be close to the average, offering a week of stable water conditions.

Daily water temperature in Yokosuka

Date Current Year

actual* / forecast**

last year 10 years average
Aug 29 81.2°F 80.1°F 81.0°F
Aug 30 81.2°F 80.5°F 80.9°F
Aug 31 80.8°F 83.2°F 80.9°F
Sep 1 80.2°F 83.6°F 80.5°F
Sep 2 79.8°F 82.3°F 80.3°F
Sep 3 79.8°F 82.0°F 80.2°F
Sep 4 80.4°F 81.0°F 79.7°F
Sep 5 80.0°F 80.6°F 79.9°F
Sep 6 78.9°F 80.7°F 79.8°F
Sep 7 78.9°F 79.9°F 79.6°F
Sep 8 79.6°F 79.7°F 79.7°F
Sep 9 78.4°F 79.7°F 79.6°F
Sep 10 77.9°F 79.6°F 79.2°F
Sep 11 77.7°F 80.6°F 79.5°F
Sep 12 77.5°F 80.3°F 79.3°F
Sep 13 77.4°F 79.9°F 79.1°F
Sep 14 77.4°F 79.9°F 79.1°F
Sep 15 77.4°F 80.3°F 79.2°F
Sep 16 77.2°F 78.9°F 79.0°F
Sep 17 77.0°F 80.9°F 78.8°F
Sep 18 77.1°F 81.1°F 78.9°F
Sep 19 76.7°F 80.7°F 78.5°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 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, 61.2°F in Spring, 76.2°F in Summer, and 72.7°F in Autumn.

Popular neighboring cities and resorts

City Water temperature* Distance**
Futtsu 77.8°F 9mi
Yokohama 77.7°F 10mi
Fujisawa 78.4°F 12mi
Kimitsu 78.7°F 12mi
Kisarazu 79.0°F 16mi
Kawasaki 78.6°F 17mi
Tokyo 79.0°F 28mi
Ichihara 81.8°F 28mi
Odawara 79.0°F 29mi
Chiba 81.6°F 33mi

* current water temperature in this city

** straight line distance from Yokosuka