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Isso Sea Temperature in April

Kagoshima, Japan

March Isso year-round → May

Average sea temperature for Isso, Japan across April, based on 10 years of daily readings.

Average

22.12° C

High

24.33° C

Low

20.2° C

Water at this temperature is very pleasant to swim in. If you tend to wear a wetsuit when swimming, you might consider removing it now to avoid the body overheating.

April is the 9th warmest of 12 months at Isso. On average the water sits 2.4° than the year-round mean of 24.56° C.

Compared to March, April is 1.1° warmer than (20.99° C in March). By May the water is usually 23.91° C.

Isso Day-by-Day Water Temperature in April

10-year low, average and high

19.5° C
20.9° C
22.3° C
23.6° C
25.0° C
1
5
10
15
20
25
30
Day-by-day low and high band with the 10-year daily average through April. Range Average

Each vertical bar above is one day of April. The shaded band covers the range the water has reached on that day across the last 10 years — the lowest reading at the bottom, the highest at the top. The line running through the bars is the daily average over those 10 years, so you can see the typical shape of the month at Isso.

A narrow band means the temperature on that day has stayed close to the average year on year. A taller band means it has swung more, often because of changeable weather around that time of year. Hovering a day pulls up its low, average, and high.

April Water Temperature Table for Isso

10-year daily averages

Day Average Low High
April 1 21.39° C 20.57° C 22.41° C
April 2 21.35° C 20.43° C 22.39° C
April 3 21.39° C 20.29° C 22.44° C
April 4 21.46° C 20.38° C 22.45° C
April 5 21.42° C 20.32° C 22.48° C
April 6 21.4° C 20.2° C 22.67° C
April 7 21.48° C 20.47° C 22.61° C
April 8 21.43° C 20.73° C 22.5° C
April 9 21.3° C 20.49° C 22.43° C
April 10 21.34° C 20.37° C 22.45° C
April 11 21.64° C 20.64° C 22.76° C
April 12 21.74° C 20.74° C 23.1° C
April 13 21.91° C 20.65° C 23.31° C
April 14 21.97° C 20.98° C 23.52° C
April 15 22.1° C 20.49° C 23.53° C
April 16 22.2° C 20.23° C 24.01° C
April 17 22.33° C 20.28° C 24.17° C
April 18 22.37° C 20.76° C 23.9° C
April 19 22.51° C 21.12° C 23.87° C
April 20 22.73° C 21.28° C 23.89° C
April 21 22.78° C 21.32° C 24.31° C
April 22 22.77° C 21.28° C 24.05° C
April 23 23.02° C 21.44° C 24.11° C
April 24 22.79° C 21.23° C 23.96° C
April 25 22.72° C 21.07° C 23.98° C
April 26 22.8° C 20.97° C 23.99° C
April 27 22.86° C 21.03° C 23.93° C
April 28 23.02° C 21.01° C 24.33° C
April 29 22.78° C 20.7° C 23.69° C
April 30 22.61° C 20.44° C 23.56° C

Where April Sits in the Year

April highlighted

14.0° C
18.8° C
23.5° C
28.3° C
33.0° C
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
21.31° C
19.97° C
20.99° C
22.12° C
23.91° C
25.92° C
28.18° C
29.11° C
28.57° C
27.15° C
24.71° C
22.81° C
10-year monthly history for Isso. Bars span historical low to high; the line marks the monthly average. Range Average
January → February → March → April → May → June → July → August → September → October → November → December →

Nearby Locations in April

Compare other Japan water for the same month

Isso Location

30.4667, 130.5000

30.46670, 130.50000 View on OpenStreetMap →

Isso sits at 30.4667°N, 130.5000°E, on the coast of Kagoshima, Japan. The marker on the map shows the spot the readings on this page come from. It usually sits a short distance from the town centre, out on the open water itself, so the numbers stay tied to the coast rather than a generic point inland.

Coastlines bend, headlands focus the water, and the temperature can run noticeably differently between two beaches that look close together on a map. Comparing nearby locations is a quick way to see how local geography is shaping the readings.

Nearest locations to Isso