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

76.3

°F

October 25, 01:39

Trend:

decreasing

Yesterday:

76.6°F

Tomorrow:

76.1°F

Sunrise:

05:53

Sunset:

16:53

Day Length:

11 h. 0 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 76.3°F. It's safe to say that the water is comfortably warm for various water-related activities. Today's reading is 1.6°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

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 77.5°F on 2024, while the historical minimum was 73.0°F on 2017.

The water temperature over the last two weeks displayed soome variability. While the two week average stayed close to the historical average, there were some days when the temperature was close to the histoorical minimum and others when it was close to the historical maximum. The forecast for the upcoming week shows a gradual cooling trend. The average temperature is expected to be 75.4°F, the minimum temperature may reach 74.8°F, and the maximum might stay at 76.1°F.

Daily water temperature in Katsuura

Date Current Year

actual* / forecast**

last year 10 years average
Oct 11 76.5°F 78.3°F 76.4°F
Oct 12 76.3°F 77.9°F 76.4°F
Oct 13 74.6°F 77.6°F 76.1°F
Oct 14 72.8°F 76.9°F 75.8°F
Oct 15 74.2°F 76.9°F 76.0°F
Oct 16 73.8°F 76.9°F 75.5°F
Oct 17 75.0°F 77.2°F 75.6°F
Oct 18 77.9°F 77.6°F 75.8°F
Oct 19 76.1°F 78.2°F 75.7°F
Oct 20 77.7°F 77.6°F 75.5°F
Oct 21 78.0°F 76.8°F 75.4°F
Oct 22 76.9°F 76.4°F 75.4°F
Oct 23 76.8°F 76.1°F 74.9°F
Oct 24 76.6°F 77.7°F 74.9°F
Oct 25 76.3°F 77.5°F 74.7°F
Oct 26 76.1°F 77.0°F 74.5°F
Oct 27 76.0°F 76.0°F 74.4°F
Oct 28 75.7°F 75.8°F 74.1°F
Oct 29 75.2°F 75.4°F 73.6°F
Oct 30 74.9°F 73.4°F 73.3°F
Oct 31 74.8°F 73.0°F 73.2°F
Nov 1 74.8°F 73.0°F 73.2°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 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 74.8°F 8mi
Kisarazu 72.6°F 27mi
Ichihara 71.9°F 29mi
Kimitsu 72.9°F 29mi
Futtsu 73.2°F 30mi
Chiba 72.1°F 33mi
Yokosuka 73.5°F 38mi
Yokohama 74.0°F 42mi
Kawasaki 73.7°F 42mi
Honchō 72.2°F 43mi

* current water temperature in this city

** straight line distance from Katsuura