All data are in degrees Fahrenheit

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Water temperature in Katsuura

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

76.7

°F

October 3, 23:19

Trend:

decreasing

Yesterday:

76.9°F

Tomorrow:

76.5°F

Sunrise:

05:34

Sunset:

17:21

Day Length:

11 h. 47 min.

Katsuura in October

Minimum:

60.8°F

Average:

63.7°F

Maximum:

66.8°F

Sea water temperature in Katsuura today

As of now, in Katsuura, the water temperature is 76.7°F. It's safe to say that the water is comfortably warm for various water-related activities. Today's reading is 0.2°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 slightly lower than the average registered over the last two weeks, indicating a slight cooling trend. 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 78.8°F on 2023, while the historical minimum was 74.2°F on 2018.

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 76.3°F, the minimum temperature may reach 76.0°F, and the maximum might stay at 76.5°F.

Daily water temperature in Katsuura

Date Current Year

actual* / forecast**

last year 10 years average
Sep 19 77.2°F 78.7°F 78.4°F
Sep 20 77.2°F 79.3°F 78.5°F
Sep 21 77.8°F 79.2°F 78.3°F
Sep 22 77.8°F 76.3°F 77.6°F
Sep 23 77.6°F 77.1°F 77.6°F
Sep 24 77.6°F 77.1°F 77.8°F
Sep 25 76.9°F 76.3°F 77.6°F
Sep 26 77.3°F 76.4°F 78.0°F
Sep 27 77.3°F 78.1°F 78.2°F
Sep 28 77.2°F 78.9°F 78.0°F
Sep 29 77.0°F 78.7°F 78.1°F
Sep 30 77.3°F 77.1°F 77.9°F
Oct 1 76.9°F 75.6°F 77.1°F
Oct 2 76.9°F 76.1°F 77.0°F
Oct 3 76.7°F 75.8°F 76.9°F
Oct 4 76.5°F 75.7°F 76.7°F
Oct 5 76.1°F 76.6°F 76.3°F
Oct 6 76.4°F 76.5°F 76.6°F
Oct 7 76.2°F 76.9°F 76.4°F
Oct 8 76.5°F 76.8°F 76.7°F
Oct 9 76.0°F 76.6°F 76.2°F
Oct 10 76.3°F 78.6°F 76.5°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 Katsuura by month

In Katsuura, the months July through October offer comfortable swimming conditions, which amounts to 118 swimming days.
The warmest water in Katsuura was recorded on September 16, 2024, reaching a 83.3°F. While the coldest temperature occurred on April 16, 2025, dipping to 56.7°F. The average readings by season are 63.3°F in Winter, 62.8°F in Spring, 75.0°F in Summer, and 75.1°F in Autumn.

Popular neighboring cities and resorts

City Water temperature* Distance**
Isumi 73.8°F 8mi
Kisarazu 73.1°F 27mi
Ichihara 74.3°F 29mi
Kimitsu 72.9°F 29mi
Futtsu 72.4°F 30mi
Chiba 74.3°F 33mi
Yokosuka 74.0°F 38mi
Yokohama 76.2°F 42mi
Kawasaki 75.1°F 42mi
Honchō 74.3°F 43mi

* current water temperature in this city

** straight line distance from Katsuura