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

67.6

°F

May 16, 07:39

Trend:

stable

Yesterday:

67.0°F

Tomorrow:

67.6°F

Sunrise:

04:35

Sunset:

18:36

Day Length:

14 h. 1 min.

Katsuura in May

Minimum:

60.8°F

Average:

64.0°F

Maximum:

67.4°F

Sea water temperature in Katsuura today

As of now, in Katsuura, the water temperature is 67.6°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 2.0°F higher 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 notably higher than the average recorded over the past two weeks, indicating a significant warming trend. It is also close to the historical maximum temperature for this date. The maximum temperature recorded for this date was 68.3°F on 2024, while the historical minimum was 62.8°F on 2020.

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 suggests a gradual increase. The average temperature is expected to rise up to 68.0°F, with minimum temperature starting at 67.6°F, while the maximum might reach 68.9°F.

Daily water temperature in Katsuura

Date Current Year

actual* / forecast**

last year 10 years average
May 2 66.0°F 61.1°F 63.1°F
May 3 65.8°F 62.2°F 63.5°F
May 4 66.8°F 61.9°F 63.7°F
May 5 65.1°F 62.7°F 63.5°F
May 6 65.0°F 63.0°F 63.8°F
May 7 65.6°F 63.4°F 64.2°F
May 8 67.0°F 62.3°F 64.3°F
May 9 63.4°F 62.7°F 63.9°F
May 10 64.9°F 63.4°F 64.6°F
May 11 64.8°F 63.8°F 65.1°F
May 12 63.2°F 63.4°F 64.6°F
May 13 64.6°F 63.1°F 64.4°F
May 14 65.1°F 63.5°F 64.3°F
May 15 67.0°F 65.0°F 65.0°F
May 16 67.6°F 65.5°F 65.6°F
May 17 67.6°F 65.8°F 65.5°F
May 18 67.6°F 66.0°F 65.5°F
May 19 67.8°F 66.2°F 65.8°F
May 20 67.9°F 64.0°F 65.9°F
May 21 68.2°F 65.3°F 66.1°F
May 22 68.4°F 65.4°F 66.4°F
May 23 68.9°F 65.6°F 66.8°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 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 64.9°F 8mi
Kisarazu 68.2°F 27mi
Ichihara 67.5°F 29mi
Kimitsu 68.4°F 29mi
Futtsu 67.9°F 30mi
Chiba 67.5°F 33mi
Yokosuka 67.9°F 38mi
Yokohama 69.8°F 42mi
Kawasaki 69.6°F 42mi
Honchō 68.3°F 43mi

* current water temperature in this city

** straight line distance from Katsuura