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

76.8

°F

July 3, 14:49

Trend:

increasing

Yesterday:

76.0°F

Tomorrow:

77.0°F

Sunrise:

04:29

Sunset:

18:57

Day Length:

14 h. 28 min.

Katsuura in July

Minimum:

60.6°F

Average:

63.4°F

Maximum:

66.2°F

Sea water temperature in Katsuura today

As of now, in Katsuura, the water temperature is 76.8°F. It's safe to say that the water is comfortably warm for various water-related activities. Today's reading is 4.4°F higher 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

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 74.5°F on 2022, while the historical minimum was 69.2°F on 2024.

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 77.7°F, with minimum temperature starting at 77.0°F, while the maximum might reach 78.2°F.

Daily water temperature in Katsuura

Date Current Year

actual* / forecast**

last year 10 years average
Jun 19 70.6°F 70.0°F 69.9°F
Jun 20 72.9°F 69.7°F 70.4°F
Jun 21 74.0°F 69.7°F 70.9°F
Jun 22 74.8°F 66.7°F 70.7°F
Jun 23 74.1°F 67.4°F 71.0°F
Jun 24 73.5°F 70.3°F 71.3°F
Jun 25 73.8°F 69.4°F 71.0°F
Jun 26 75.3°F 70.8°F 71.6°F
Jun 27 74.8°F 71.2°F 71.4°F
Jun 28 75.3°F 71.3°F 71.8°F
Jun 29 74.1°F 71.5°F 71.9°F
Jun 30 73.5°F 67.5°F 71.7°F
Jul 1 74.8°F 68.1°F 72.0°F
Jul 2 76.0°F 68.7°F 71.6°F
Jul 3 76.8°F 69.2°F 72.4°F
Jul 4 77.0°F 70.5°F 72.6°F
Jul 5 77.4°F 74.0°F 73.0°F
Jul 6 77.7°F 74.6°F 73.3°F
Jul 7 77.7°F 74.4°F 73.3°F
Jul 8 77.9°F 74.1°F 73.5°F
Jul 9 78.2°F 74.6°F 73.8°F
Jul 10 77.8°F 73.5°F 73.3°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 112 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, 74.6°F in Summer, and 74.9°F in Autumn.

Popular neighboring cities and resorts

City Water temperature* Distance**
Isumi 75.2°F 8mi
Kisarazu 78.6°F 27mi
Ichihara 80.0°F 29mi
Kimitsu 78.1°F 29mi
Futtsu 77.7°F 30mi
Chiba 80.3°F 33mi
Yokosuka 77.9°F 38mi
Yokohama 78.7°F 42mi
Kawasaki 79.2°F 42mi
Honchō 80.0°F 43mi

* current water temperature in this city

** straight line distance from Katsuura