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

70.8

°F

November 15, 01:59

Trend:

stable

Yesterday:

70.2°F

Tomorrow:

70.8°F

Sunrise:

06:13

Sunset:

16:33

Day Length:

10 h. 20 min.

Katsuura in November

Minimum:

60.4°F

Average:

63.7°F

Maximum:

66.2°F

Sea water temperature in Katsuura today

As of now, in Katsuura, the water temperature is 70.8°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 0.2°F lower 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 stay about the same.

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 also aligns closely with the historical average temperature for this date, indicating a typical climate pattern. The maximum temperature recorded for this date was 74.5°F on 2024, while the historical minimum was 66.5°F on 2025.

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 maximum recorded over the past years. The forecast for the upcoming week shows a gradual cooling trend. The average temperature is expected to be 70.0°F, the minimum temperature may reach 69.5°F, and the maximum might stay at 70.8°F.

Daily water temperature in Katsuura

Date Current Year

actual* / forecast**

last year 10 years average
Nov 1 72.2°F 73.0°F 73.1°F
Nov 2 73.1°F 72.1°F 73.4°F
Nov 3 73.3°F 69.6°F 73.3°F
Nov 4 73.7°F 69.0°F 73.3°F
Nov 5 74.4°F 69.4°F 73.1°F
Nov 6 74.8°F 69.6°F 73.4°F
Nov 7 74.9°F 71.0°F 73.1°F
Nov 8 74.4°F 71.5°F 72.6°F
Nov 9 73.8°F 71.0°F 71.9°F
Nov 10 73.2°F 70.6°F 71.7°F
Nov 11 70.9°F 69.4°F 71.2°F
Nov 12 70.5°F 68.9°F 70.6°F
Nov 13 70.5°F 68.7°F 70.5°F
Nov 14 70.2°F 68.3°F 70.4°F
Nov 15 70.8°F 66.5°F 71.0°F
Nov 16 70.8°F 67.4°F 71.0°F
Nov 17 70.4°F 66.9°F 70.6°F
Nov 18 69.9°F 67.3°F 70.1°F
Nov 19 69.9°F 66.9°F 70.2°F
Nov 20 69.9°F 67.5°F 70.2°F
Nov 21 69.6°F 69.6°F 69.8°F
Nov 22 69.5°F 68.1°F 69.8°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 119 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 68.3°F 8mi
Kisarazu 66.3°F 27mi
Ichihara 64.5°F 29mi
Kimitsu 65.8°F 29mi
Futtsu 66.1°F 30mi
Chiba 64.4°F 33mi
Yokosuka 65.5°F 38mi
Yokohama 65.2°F 42mi
Kawasaki 64.0°F 42mi
Honchō 63.4°F 43mi

* current water temperature in this city

** straight line distance from Katsuura