What is the current water temperature in Katsuura?

As of now, in Katsuura, the water temperature is 25.79°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.

78.4

°F

October 11, 05:34

Trend:

stable

Yesterday:

78.6°F

Tomorrow:

78.5°F

Sunrise:

05:41

Sunset:

17:10

Day Length:

11 h. 29 min.

Katsuura in October

Minimum:

60.8°F

Average:

63.6°F

Maximum:

66.8°F

Sea water temperature in Katsuura today

As of now, in Katsuura, the water temperature is 78.4°F. It's safe to say that the water is comfortably warm for various water-related activities. Today's reading is 2.5°F higher than the average recorded on this particular day in recent years. The sea temperature remains approximately unchanged from yesterday. 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 77.2°F on 2024, while the historical minimum was 73.6°F on 2015.

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. Over the next week, the forecast shows a steady trend, with temperatures staying close to the average of 78.1°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
Sep 27	78.1°F	78.8°F	78.1°F
Sep 28	78.9°F	78.5°F	77.9°F
Sep 29	78.7°F	78.1°F	78.0°F
Sep 30	77.1°F	77.9°F	77.8°F
Oct 1	75.6°F	77.5°F	76.9°F
Oct 2	76.1°F	77.7°F	76.8°F
Oct 3	75.8°F	77.6°F	76.7°F
Oct 4	75.7°F	78.4°F	76.5°F
Oct 5	76.6°F	78.3°F	76.1°F
Oct 6	76.5°F	76.7°F	76.3°F
Oct 7	76.9°F	78.6°F	76.1°F
Oct 8	76.8°F	78.8°F	76.4°F
Oct 9	76.6°F	78.4°F	76.0°F
Oct 10	78.6°F	78.2°F	76.1°F
Oct 11	78.4°F	77.2°F	75.9°F
Oct 12	78.5°F	78.3°F	76.0°F
Oct 13	78.3°F	78.8°F	75.8°F
Oct 14	78.2°F	78.9°F	75.7°F
Oct 15	78.3°F	78.4°F	75.8°F
Oct 16	77.8°F	78.4°F	75.3°F
Oct 17	77.8°F	79.1°F	75.3°F
Oct 18	77.6°F	78.7°F	75.1°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	75.7°F	8mi
Kisarazu	72.2°F	27mi
Ichihara	71.7°F	29mi
Kimitsu	72.2°F	29mi
Futtsu	72.4°F	30mi
Chiba	71.8°F	33mi
Yokosuka	73.2°F	38mi
Yokohama	72.5°F	42mi
Kawasaki	72.7°F	42mi
Honchō	71.7°F	43mi

* current water temperature in this city

** straight line distance from Katsuura