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

66.7

°F

May 2, 07:05

Trend:

increasing

Yesterday:

66.7°F

Tomorrow:

67.2°F

Sunrise:

04:48

Sunset:

18:25

Day Length:

13 h. 37 min.

Katsuura in May

Minimum:

60.8°F

Average:

64.0°F

Maximum:

67.4°F

Sea water temperature in Katsuura today

As of now, in Katsuura, the water temperature is 66.7°F. Swimming in water of this temperature is seen as relatively warm and enjoyable for some individuals, although many might find it slightly too cool. Today's reading is 4.0°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

Today's water temperature is slightly lower than the average registered over the last two weeks, indicating a slight cooling trend. It is also close to the historical maximum temperature for this date. The maximum temperature recorded for this date was 66.2°F on 2024, while the historical minimum was 61.0°F on 2019.

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 67.6°F, with minimum temperature starting at 67.2°F, while the maximum might reach 68.0°F.

Daily water temperature in Katsuura

Date Current Year

actual* / forecast**

last year 10 years average
Apr 18 63.9°F 58.2°F 62.1°F
Apr 19 66.1°F 57.6°F 62.1°F
Apr 20 67.4°F 57.4°F 62.4°F
Apr 21 68.3°F 58.9°F 62.9°F
Apr 22 68.1°F 60.8°F 63.1°F
Apr 23 68.1°F 61.0°F 63.3°F
Apr 24 67.9°F 60.9°F 63.3°F
Apr 25 67.9°F 61.2°F 63.6°F
Apr 26 67.6°F 62.9°F 64.1°F
Apr 27 69.0°F 61.8°F 64.0°F
Apr 28 68.3°F 62.2°F 63.5°F
Apr 29 66.5°F 62.1°F 63.1°F
Apr 30 66.5°F 60.5°F 62.7°F
May 1 66.7°F 60.6°F 62.8°F
May 2 66.7°F 61.1°F 62.8°F
May 3 67.2°F 62.2°F 63.2°F
May 4 67.3°F 61.9°F 63.3°F
May 5 67.3°F 62.7°F 63.3°F
May 6 67.6°F 63.0°F 63.6°F
May 7 68.0°F 63.4°F 64.0°F
May 8 67.9°F 62.3°F 64.0°F
May 9 67.9°F 62.7°F 63.9°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, 62.7°F in Spring, 74.9°F in Summer, and 75.1°F in Autumn.

Popular neighboring cities and resorts

City Water temperature* Distance**
Isumi 65.3°F 8mi
Kisarazu 64.6°F 27mi
Ichihara 64.5°F 29mi
Kimitsu 64.5°F 29mi
Futtsu 64.4°F 30mi
Chiba 64.6°F 33mi
Yokosuka 64.6°F 38mi
Yokohama 64.5°F 42mi
Kawasaki 65.1°F 42mi
Honchō 64.4°F 43mi

* current water temperature in this city

** straight line distance from Katsuura