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

81.3

°F

August 5, 19:06

Trend:

stable

Yesterday:

82.0°F

Tomorrow:

81.8°F

Sunrise:

04:50

Sunset:

18:39

Day Length:

13 h. 49 min.

Katsuura in August

Minimum:

61.7°F

Average:

63.8°F

Maximum:

66.0°F

Sea water temperature in Katsuura today

As of now, in Katsuura, the water temperature is 81.3°F. It's safe to say that the water is comfortably warm for various water-related activities. Today's reading is 2.8°F higher 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

The water temperature today is above average for the last two weeks, showing a small increase in temperature. It is also close to the historical maximum temperature for this date. The maximum temperature recorded for this date was 80.3°F on 2017, while the historical minimum was 76.0°F on 2023.

Observations from the last two weeks indicate that the water temperature was in proximity to the highest values recorded on those days in the past. The forecast for the upcoming week suggests a gradual increase. The average temperature is expected to rise up to 82.1°F, with minimum temperature starting at 81.8°F, while the maximum might reach 82.4°F.

Daily water temperature in Katsuura

Date Current Year

actual* / forecast**

last year 10 years average
Jul 22 81.3°F 76.9°F 76.5°F
Jul 23 82.2°F 77.5°F 76.2°F
Jul 24 82.1°F 77.2°F 76.7°F
Jul 25 80.9°F 77.8°F 77.0°F
Jul 26 78.3°F 77.8°F 76.8°F
Jul 27 77.2°F 77.6°F 77.1°F
Jul 28 79.0°F 77.6°F 77.0°F
Jul 29 80.0°F 77.8°F 77.1°F
Jul 30 80.2°F 78.2°F 77.3°F
Jul 31 81.2°F 78.2°F 77.4°F
Aug 1 82.1°F 77.7°F 77.7°F
Aug 2 82.1°F 78.2°F 78.0°F
Aug 3 81.0°F 77.8°F 78.0°F
Aug 4 82.0°F 78.7°F 78.5°F
Aug 5 81.3°F 79.1°F 78.5°F
Aug 6 81.8°F 78.6°F 79.0°F
Aug 7 82.3°F 79.6°F 79.5°F
Aug 8 82.4°F 78.9°F 79.6°F
Aug 9 82.3°F 81.2°F 79.5°F
Aug 10 82.0°F 80.9°F 79.2°F
Aug 11 81.8°F 80.6°F 79.0°F
Aug 12 82.0°F 80.9°F 79.2°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 115 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, 74.8°F in Summer, and 74.9°F in Autumn.

Popular neighboring cities and resorts

City Water temperature* Distance**
Isumi 78.2°F 8mi
Kisarazu 82.2°F 27mi
Ichihara 83.7°F 29mi
Kimitsu 81.7°F 29mi
Futtsu 81.2°F 30mi
Chiba 83.5°F 33mi
Yokosuka 80.1°F 38mi
Yokohama 82.2°F 42mi
Kawasaki 82.7°F 42mi
Honchō 82.3°F 43mi

* current water temperature in this city

** straight line distance from Katsuura