All data are in degrees Fahrenheit

en

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

81.1

°F

August 29, 18:02

Trend:

decreasing

Yesterday:

82.3°F

Tomorrow:

80.9°F

Sunrise:

05:08

Sunset:

18:11

Day Length:

13 h. 3 min.

Katsuura in September

Minimum:

61.5°F

Average:

64.0°F

Maximum:

66.4°F

Sea water temperature in Katsuura today

As of now, in Katsuura, the water temperature is 81.1°F. It's safe to say that the water is comfortably warm for various water-related activities. Today's reading is 1.4°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 slightly 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 82.9°F on 2020, while the historical minimum was 76.6°F on 2022.

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 shows a gradual cooling trend. The average temperature is expected to be 80.6°F, the minimum temperature may reach 80.2°F, and the maximum might stay at 81.0°F.

Daily water temperature in Katsuura

Date Current Year

actual* / forecast**

last year 10 years average
Aug 15 80.5°F 76.8°F 79.6°F
Aug 16 80.7°F 77.6°F 80.0°F
Aug 17 80.2°F 77.9°F 79.7°F
Aug 18 80.7°F 78.8°F 79.5°F
Aug 19 81.3°F 77.9°F 79.4°F
Aug 20 81.6°F 78.5°F 79.6°F
Aug 21 82.1°F 79.2°F 79.5°F
Aug 22 81.7°F 78.8°F 79.4°F
Aug 23 82.1°F 80.1°F 80.0°F
Aug 24 82.3°F 79.8°F 79.8°F
Aug 25 81.9°F 78.9°F 79.3°F
Aug 26 81.7°F 79.7°F 80.1°F
Aug 27 80.7°F 79.0°F 80.0°F
Aug 28 82.3°F 78.5°F 79.9°F
Aug 29 81.1°F 78.2°F 79.8°F
Aug 30 80.9°F 78.8°F 79.6°F
Aug 31 81.0°F 79.8°F 79.6°F
Sep 1 80.7°F 81.0°F 79.3°F
Sep 2 80.7°F 81.1°F 79.3°F
Sep 3 80.2°F 81.9°F 78.9°F
Sep 4 80.3°F 81.4°F 78.9°F
Sep 5 80.5°F 80.9°F 79.2°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 79.8°F 8mi
Kisarazu 83.6°F 27mi
Ichihara 83.9°F 29mi
Kimitsu 83.4°F 29mi
Futtsu 82.7°F 30mi
Chiba 83.6°F 33mi
Yokosuka 81.2°F 38mi
Yokohama 81.4°F 42mi
Kawasaki 82.3°F 42mi
Honchō 83.1°F 43mi

* current water temperature in this city

** straight line distance from Katsuura