Water temperature in Katsuura in April

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Is it warm enough to swim in Katsuura in April? Average water temperature in Katsuura in April is 16.9°C and therefore is not suitable for comfortable swimming. The warmest sea in Katsuura in April is 19.5°C, and the coldest is 13.2°C. To find out the sea temperature today and in the coming days, go to Current sea temperature in Katsuura

Changes water temperature in Katsuura in April 2025, 2024

To get an accurate forecast for the water temperature in Katsuura for any chosen month, compare two years within a 10 year range using the chart below. In addition to the sea water temperature in Katsuura, the selected years in the table also show the values of the maximum and minimum temperatures on each of the days of April.

Sea temperature

Tides

Weather forecast

You can choose any other years:

Day	2025	2024	Min	Max
1 April	16.1°C	15.5°C	14.4°C	17.1°C
2 April	16.2°C	15.6°C	14.5°C	17.4°C
3 April	15.6°C	15.7°C	14.5°C	18.3°C
4 April	15.1°C	15.8°C	13.6°C	18.3°C
5 April	15.8°C	16°C	13.2°C	18.4°C
6 April	15.8°C	16.1°C	14.3°C	18.9°C
7 April	15.3°C	16.4°C	14.3°C	18.9°C
8 April	15.3°C	16.4°C	13.8°C	18.5°C
9 April	15.5°C	16.2°C	14.8°C	18.3°C
10 April	15.7°C	16.4°C	15.3°C	18.1°C
11 April	15.3°C	16.5°C	15.3°C	18.1°C
12 April	15.3°C	16.4°C	15.3°C	17.9°C
13 April	15.4°C	15.9°C	15.3°C	18°C
14 April	14.4°C	16.6°C	14.4°C	18°C
15 April	13.7°C	16.8°C	13.7°C	17.9°C

Day	2025	2024	Min	Max
16 April	14.5°C	17.3°C	14.5°C	18°C
17 April	14.5°C	17.3°C	14.5°C	17.9°C
18 April	14.2°C	18.6°C	14.2°C	18.6°C
19 April	14.1°C	17.9°C	14.1°C	18.6°C
20 April	15°C	17.8°C	15°C	18.7°C
21 April	16°C	17.9°C	16°C	18.3°C
22 April	16.1°C	18.1°C	15.8°C	18.4°C
23 April	16.1°C	18.2°C	15.7°C	18.5°C
24 April	16.2°C	18.5°C	16.1°C	18.5°C
25 April	17.2°C	18.4°C	16.6°C	18.8°C
26 April	16.6°C	18.5°C	16.6°C	18.9°C
27 April	16.8°C	18.1°C	15.8°C	19.2°C
28 April	16.7°C	18.3°C	15.7°C	19.4°C
29 April	15.8°C	18.5°C	15.8°C	19.5°C
30 April	15.9°C	19°C	15.5°C	19.5°C

Average water temperature in Katsuura in April over a decade

2016	2017	2018	2019	2020
17.8°C	16.3°C	16.7°C	16.2°C	16.5°C

2021	2022	2023	2024	2025
17.2°C	17°C	16.4°C	17.1°C	15.5°C

Katsuura sea state in April

Chart comparing the height of waves in Katsuura in April over the past years. The red line indicates the height of the waves when swimming in the sea is prohibited. To view the current sea conditions, click on the graph.

Katsuura water temperature during other months:

You can also view information about water temperature for other months by clicking on the month button below

Temperature in neighboring cities

The nearest locations with the average water temperature in April. In addition, the maximum and minimum water temperatures for that month, recorded over the last decade, are shown

	Avr	Min	Max
Kawaguchi	16.8°C	13.5°C	19.5°C
Kisarazu	15.6°C	12.5°C	19.1°C
Futtsu	15.7°C	12.7°C	19°C
Narashino	15.4°C	12.4°C	19.5°C
Yokosuka	15.7°C	12.8°C	19°C
Miura	16.3°C	13.3°C	19.3°C
Hayama	16°C	13.1°C	19°C
Kawasaki	15.5°C	12.3°C	20.1°C
Funabashi	15.5°C	12.2°C	20.7°C
Kamakura	16.1°C	13.3°C	18.9°C

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Our report for Katsuura is compiled using satellite data together with in-situ observations to get the most reliable daily data of sea surface temperatures, surf forecasts, current temperatures and weather forecasts.

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Date (day and month)

Water temperature: min 16°C

Average temperature Maximum temperature