What is the current water temperature in Katsuura?

Q: What is the current water temperature in Katsuura?

As of now, in Katsuura, the water temperature is 20.13°C. Swimming in water of this temperature is seen as relatively warm and enjoyable for some individuals, although many might find it slightly too cool.

Japan > Katsuura

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.

68.2

°F

April 25, 05:31

Trend:

increasing

Yesterday:

67.9°F

Tomorrow:

68.8°F

Sunrise:

04:55

Sunset:

18:19

Day Length:

13 h. 24 min.

Katsuura in April

Minimum:

61.4°F

Average:

63.9°F

Maximum:

67.9°F

Sea water temperature in Katsuura today

As of now, in Katsuura, the water temperature is 68.2°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 5.1°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 65.2°F on 2024, while the historical minimum was 61.1°F on 2020.

latest data

last year

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 68.1°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
Apr 11	58.3°F	60.2°F	61.1°F
Apr 12	56.9°F	59.5°F	61.0°F
Apr 13	58.4°F	59.6°F	61.3°F
Apr 14	59.8°F	59.8°F	61.2°F
Apr 15	62.6°F	57.9°F	61.5°F
Apr 16	62.6°F	56.7°F	61.6°F
Apr 17	63.8°F	58.1°F	61.9°F
Apr 18	63.9°F	58.2°F	62.1°F
Apr 19	66.1°F	57.6°F	62.1°F
Apr 20	67.4°F	57.4°F	62.4°F
Apr 21	68.3°F	58.9°F	62.9°F
Apr 22	68.1°F	60.8°F	63.1°F
Apr 23	68.1°F	61.0°F	63.3°F
Apr 24	67.9°F	60.9°F	62.8°F
Apr 25	68.2°F	61.2°F	63.2°F
Apr 26	68.8°F	62.9°F	63.8°F
Apr 27	68.6°F	61.8°F	63.5°F
Apr 28	68.1°F	62.2°F	63.0°F
Apr 29	67.9°F	62.1°F	62.8°F
Apr 30	67.4°F	60.5°F	62.3°F
May 1	67.8°F	60.6°F	62.8°F
May 2	67.9°F	61.1°F	62.8°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, 62.7°F in Spring, 74.9°F in Summer, and 75.1°F in Autumn.

Popular neighboring cities and resorts

City	Water temperature*	Distance**
Isumi	66.8°F	8mi
Kisarazu	62.7°F	27mi
Ichihara	63.1°F	29mi
Kimitsu	62.6°F	29mi
Futtsu	62.8°F	30mi
Chiba	63.6°F	33mi
Yokosuka	62.9°F	38mi
Yokohama	63.4°F	42mi
Kawasaki	64.2°F	42mi
Honchō	64.5°F	43mi

* current water temperature in this city

** straight line distance from Katsuura