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

70.2

°F

June 6, 09:19

Trend:

decreasing

Yesterday:

70.4°F

Tomorrow:

70.1°F

Sunrise:

04:25

Sunset:

18:50

Day Length:

14 h. 25 min.

Katsuura in June

Minimum:

59.5°F

Average:

63.5°F

Maximum:

66.9°F

Sea water temperature in Katsuura today

As of now, in Katsuura, the water temperature is 70.2°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 1.2°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 stay about the same.

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 71.3°F on 2024, while the historical minimum was 66.8°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. Over the next week, the forecast shows a steady trend, with temperatures staying close to the average of 70.5°F. Both minimum and maximum temperatures expected to be close to the average, offering a week of stable water conditions.

Daily water temperature in Katsuura

Date Current Year

actual* / forecast**

last year 10 years average
May 23 69.7°F 65.6°F 67.1°F
May 24 67.4°F 65.8°F 67.5°F
May 25 66.3°F 65.9°F 67.6°F
May 26 68.3°F 66.2°F 67.9°F
May 27 70.8°F 66.5°F 68.1°F
May 28 72.5°F 67.0°F 68.4°F
May 29 73.2°F 67.7°F 69.1°F
May 30 72.0°F 68.0°F 68.6°F
May 31 72.6°F 68.4°F 69.0°F
Jun 1 72.3°F 69.2°F 69.1°F
Jun 2 72.1°F 70.0°F 68.9°F
Jun 3 71.7°F 69.9°F 69.0°F
Jun 4 70.8°F 68.0°F 68.7°F
Jun 5 70.4°F 71.0°F 69.2°F
Jun 6 70.2°F 70.3°F 69.0°F
Jun 7 70.1°F 70.4°F 68.9°F
Jun 8 70.4°F 70.5°F 69.3°F
Jun 9 70.1°F 70.7°F 68.9°F
Jun 10 70.4°F 70.7°F 69.2°F
Jun 11 70.7°F 70.6°F 69.5°F
Jun 12 71.0°F 70.5°F 69.8°F
Jun 13 70.8°F 70.5°F 69.6°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, 74.9°F in Summer, and 75.1°F in Autumn.

Popular neighboring cities and resorts

City Water temperature* Distance**
Isumi 69.6°F 8mi
Kisarazu 70.4°F 27mi
Ichihara 71.3°F 29mi
Kimitsu 70.1°F 29mi
Futtsu 69.6°F 30mi
Chiba 71.5°F 33mi
Yokosuka 69.3°F 38mi
Yokohama 70.3°F 42mi
Kawasaki 71.1°F 42mi
Honchō 72.0°F 43mi

* current water temperature in this city

** straight line distance from Katsuura