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

75.8

°F

October 28, 13:05

Trend:

decreasing

Yesterday:

76.0°F

Tomorrow:

75.2°F

Sunrise:

05:56

Sunset:

16:49

Day Length:

10 h. 53 min.

Katsuura in November

Minimum:

60.4°F

Average:

63.6°F

Maximum:

66.2°F

Sea water temperature in Katsuura today

As of now, in Katsuura, the water temperature is 75.8°F. It's safe to say that the water is comfortably warm for various water-related activities. Today's reading is 2.2°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 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 maximum temperature for this date. The maximum temperature recorded for this date was 77.1°F on 2024, while the historical minimum was 70.3°F on 2015.

Over the last two weeks, the water temperature has stayed slightly above than historical averages for those days. The forecast for the upcoming week shows a gradual cooling trend. The average temperature is expected to be 75.2°F, the minimum temperature may reach 75.0°F, and the maximum might stay at 75.5°F.

Daily water temperature in Katsuura

Date Current Year

actual* / forecast**

last year 10 years average
Oct 14 76.9°F 78.9°F 75.8°F
Oct 15 76.9°F 78.4°F 75.9°F
Oct 16 76.9°F 78.4°F 75.5°F
Oct 17 77.2°F 79.1°F 75.5°F
Oct 18 77.6°F 78.7°F 75.3°F
Oct 19 78.2°F 78.9°F 75.3°F
Oct 20 77.6°F 78.3°F 75.0°F
Oct 21 76.8°F 76.3°F 74.9°F
Oct 22 76.4°F 78.2°F 74.9°F
Oct 23 76.1°F 78.1°F 74.4°F
Oct 24 77.7°F 77.7°F 74.6°F
Oct 25 77.5°F 77.5°F 74.5°F
Oct 26 77.0°F 77.1°F 74.2°F
Oct 27 76.0°F 77.8°F 73.9°F
Oct 28 75.8°F 77.1°F 73.6°F
Oct 29 75.2°F 76.5°F 73.1°F
Oct 30 75.1°F 76.2°F 73.0°F
Oct 31 75.1°F 74.9°F 73.0°F
Nov 1 75.0°F 77.5°F 72.8°F
Nov 2 75.4°F 77.0°F 73.2°F
Nov 3 75.4°F 75.8°F 73.3°F
Nov 4 75.5°F 75.7°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 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 74.2°F 8mi
Kisarazu 69.0°F 27mi
Ichihara 70.7°F 29mi
Kimitsu 68.8°F 29mi
Futtsu 68.3°F 30mi
Chiba 70.7°F 33mi
Yokosuka 69.9°F 38mi
Yokohama 69.5°F 42mi
Kawasaki 70.3°F 42mi
Honchō 70.5°F 43mi

* current water temperature in this city

** straight line distance from Katsuura