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 22.78°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.

73.0

°F

June 13, 11:07

Trend:

decreasing

Yesterday:

73.2°F

Tomorrow:

72.6°F

Sunrise:

04:24

Sunset:

18:54

Day Length:

14 h. 30 min.

Katsuura in June

Minimum:

59.5°F

Average:

63.5°F

Maximum:

66.9°F

Sea water temperature in Katsuura today

As of now, in Katsuura, the water temperature is 73.0°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 3.4°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 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 71.6°F on 2024, while the historical minimum was 65.6°F on 2022.

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 73.1°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
May 30	72.0°F	68.0°F	68.6°F
May 31	72.6°F	68.4°F	69.0°F
Jun 1	72.3°F	69.2°F	69.1°F
Jun 2	72.1°F	70.0°F	68.9°F
Jun 3	71.7°F	69.9°F	69.0°F
Jun 4	70.8°F	68.0°F	68.7°F
Jun 5	70.4°F	71.0°F	69.4°F
Jun 6	70.3°F	70.3°F	69.1°F
Jun 7	70.8°F	70.4°F	69.1°F
Jun 8	71.0°F	70.5°F	69.4°F
Jun 9	71.0°F	70.7°F	69.0°F
Jun 10	71.0°F	70.7°F	69.4°F
Jun 11	72.4°F	70.6°F	69.8°F
Jun 12	73.2°F	70.5°F	69.8°F
Jun 13	73.0°F	70.5°F	69.6°F
Jun 14	72.6°F	70.8°F	69.2°F
Jun 15	72.8°F	71.0°F	69.4°F
Jun 16	73.1°F	71.3°F	69.7°F
Jun 17	72.8°F	72.1°F	69.4°F
Jun 18	73.0°F	70.3°F	69.6°F
Jun 19	73.3°F	70.6°F	69.9°F
Jun 20	73.9°F	72.9°F	70.5°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	72.1°F	8mi
Kisarazu	72.4°F	27mi
Ichihara	70.2°F	29mi
Kimitsu	72.4°F	29mi
Futtsu	72.0°F	30mi
Chiba	70.1°F	33mi
Yokosuka	71.0°F	38mi
Yokohama	70.7°F	42mi
Kawasaki	71.2°F	42mi
Honchō	70.6°F	43mi

* current water temperature in this city

** straight line distance from Katsuura