What is the current water temperature in Katsuura?

As of now, in Katsuura, the water temperature is 23.24°C. It's safe to say that the water is comfortably warm for various water-related activities.

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.

73.8

°F

November 28, 17:10

Trend:

stable

Yesterday:

72.9°F

Tomorrow:

73.5°F

Sunrise:

06:25

Sunset:

16:27

Day Length:

10 h. 2 min.

Katsuura in December

Minimum:

59.6°F

Average:

63.3°F

Maximum:

66.9°F

Sea water temperature in Katsuura today

As of now, in Katsuura, the water temperature is 73.8°F. It's safe to say that the water is comfortably warm for various water-related activities. Today's reading is 5.0°F higher than the average recorded on this particular day in recent years. Since yesterday, there was a noticeable increase in temperature. This indicates a warming trend over the past day. According to the forecast, we expect the temperature to fall 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 71.5°F on 2020, while the historical minimum was 63.7°F on 2021.

latest data

last year

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 shows a gradual cooling trend. The average temperature is expected to be 73.0°F, the minimum temperature may reach 72.1°F, and the maximum might stay at 73.5°F.

Daily water temperature in Katsuura

Date	Current Year actual* / forecast**	last year	10 years average
Nov 14	68.3°F	72.4°F	70.3°F
Nov 15	66.5°F	74.5°F	70.8°F
Nov 16	67.4°F	74.1°F	70.8°F
Nov 17	66.9°F	73.6°F	70.4°F
Nov 18	67.3°F	73.4°F	70.0°F
Nov 19	66.9°F	73.3°F	69.9°F
Nov 20	67.5°F	72.2°F	70.0°F
Nov 21	69.6°F	69.7°F	69.8°F
Nov 22	68.1°F	71.2°F	69.7°F
Nov 23	68.9°F	70.1°F	69.9°F
Nov 24	70.5°F	71.8°F	69.9°F
Nov 25	71.4°F	71.7°F	69.9°F
Nov 26	72.2°F	71.4°F	70.0°F
Nov 27	72.9°F	71.0°F	69.3°F
Nov 28	73.8°F	69.6°F	68.9°F
Nov 29	73.5°F	66.4°F	68.6°F
Nov 30	73.4°F	67.6°F	68.5°F
Dec 1	73.1°F	66.2°F	68.2°F
Dec 2	73.1°F	67.4°F	68.1°F
Dec 3	73.0°F	69.1°F	68.0°F
Dec 4	72.6°F	69.5°F	67.7°F
Dec 5	72.1°F	66.9°F	67.1°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 115 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, 74.8°F in Summer, and 74.9°F in Autumn.

Popular neighboring cities and resorts

City	Water temperature*	Distance**
Isumi	72.1°F	8mi
Kisarazu	61.6°F	27mi
Ichihara	61.9°F	29mi
Kimitsu	61.3°F	29mi
Futtsu	62.9°F	30mi
Chiba	61.6°F	33mi
Yokosuka	65.9°F	38mi
Yokohama	62.1°F	42mi
Kawasaki	61.9°F	42mi
Honchō	58.9°F	43mi

* current water temperature in this city

** straight line distance from Katsuura