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

70.6

°F

May 23, 08:00

Trend:

increasing

Yesterday:

70.2°F

Tomorrow:

71.3°F

Sunrise:

04:30

Sunset:

18:41

Day Length:

14 h. 11 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 70.6°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 3.8°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 rise a bit.

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 69.4°F on 2021, while the historical minimum was 64.2°F on 2019.

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 71.7°F, with minimum temperature starting at 71.3°F, while the maximum might reach 72.5°F.

Daily water temperature in Katsuura

Date Current Year

actual* / forecast**

last year 10 years average
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 65.2°F
May 16 68.2°F 65.5°F 65.8°F
May 17 70.1°F 65.8°F 65.9°F
May 18 71.9°F 66.0°F 66.1°F
May 19 71.6°F 66.2°F 66.3°F
May 20 70.3°F 64.0°F 66.3°F
May 21 70.4°F 65.3°F 66.5°F
May 22 70.2°F 65.4°F 66.4°F
May 23 70.6°F 65.6°F 66.8°F
May 24 71.3°F 65.8°F 67.5°F
May 25 71.5°F 65.9°F 67.7°F
May 26 71.6°F 66.2°F 67.8°F
May 27 71.6°F 66.5°F 67.8°F
May 28 71.7°F 67.0°F 68.0°F
May 29 72.5°F 67.7°F 68.7°F
May 30 72.1°F 68.0°F 68.3°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 68.5°F 8mi
Kisarazu 68.6°F 27mi
Ichihara 69.7°F 29mi
Kimitsu 69.1°F 29mi
Futtsu 69.4°F 30mi
Chiba 70.0°F 33mi
Yokosuka 71.1°F 38mi
Yokohama 68.5°F 42mi
Kawasaki 69.4°F 42mi
Honchō 69.5°F 43mi

* current water temperature in this city

** straight line distance from Katsuura