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

59.5

°F

March 7, 01:38

Trend:

increasing

Yesterday:

59.1°F

Tomorrow:

59.6°F

Sunrise:

06:02

Sunset:

17:39

Day Length:

11 h. 37 min.

Katsuura in March

Minimum:

59.2°F

Average:

63.7°F

Maximum:

67.6°F

Sea water temperature in Katsuura today

As of now, in Katsuura, the water temperature is 59.5°F. Swimming in water of this temperature is considered as extremely cold, and there's a substantial risk of hypothermia if exposed for more than a brief duration. Today's reading is 1.3°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

The water temperature today is above average for the last two weeks, showing a small increase in temperature. It is also close to the historical minimum temperature for this date. The maximum temperature recorded for this date was 62.8°F on 2024, while the historical minimum was 58.8°F on 2023.

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 minimum recorded over the past years. Over the next week, the forecast shows a steady trend, with temperatures staying close to the average of 59.5°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
Feb 21 58.8°F 60.8°F 60.0°F
Feb 22 59.3°F 60.9°F 60.6°F
Feb 23 59.3°F 62.0°F 60.1°F
Feb 24 58.6°F 61.7°F 60.9°F
Feb 25 58.7°F 61.1°F 60.6°F
Feb 26 58.8°F 59.3°F 60.5°F
Feb 27 58.1°F 60.3°F 60.2°F
Feb 28 58.4°F 59.5°F 60.3°F
Mar 1 59.4°F 59.5°F 60.4°F
Mar 2 59.4°F 59.6°F 60.5°F
Mar 3 59.9°F 58.7°F 60.5°F
Mar 4 60.7°F 59.1°F 60.6°F
Mar 5 59.2°F 59.5°F 60.4°F
Mar 6 59.1°F 59.7°F 60.3°F
Mar 7 59.5°F 62.5°F 60.7°F
Mar 8 59.6°F 61.4°F 60.9°F
Mar 9 59.9°F 62.0°F 61.2°F
Mar 10 59.5°F 61.4°F 60.8°F
Mar 11 59.8°F 61.1°F 61.1°F
Mar 12 59.4°F 60.5°F 60.6°F
Mar 13 59.2°F 60.7°F 60.4°F
Mar 14 58.8°F 60.9°F 60.1°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, 62.7°F in Spring, 74.9°F in Summer, and 75.1°F in Autumn.

Popular neighboring cities and resorts

City Water temperature* Distance**
Isumi 58.0°F 8mi
Kisarazu 56.1°F 27mi
Ichihara 53.5°F 29mi
Kimitsu 56.0°F 29mi
Futtsu 55.6°F 30mi
Chiba 53.5°F 33mi
Yokosuka 53.4°F 38mi
Yokohama 55.2°F 42mi
Kawasaki 53.8°F 42mi
Honchō 53.0°F 43mi

* current water temperature in this city

** straight line distance from Katsuura