Hiroshima — Water Temperature in June

Water Temperature Range

17°C

minimum

21°C

average

25°C

maximum

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Water Temperature Chart for Month

The chart shows the average daily water temperature for each day of the month based on historical data.

Table of Water Temperatures by Day of the Month for Previous Years

Day	2026	2025	2024	2023
JUN 1	-10°C	21°C	17°C	19°C
JUN 2	21°C	18°C	17°C	19°C
JUN 3	22°C	19°C	17°C	19°C
JUN 4	22°C	19°C	17°C	19°C
JUN 5	21°C	19°C	17°C	19°C
JUN 6	21°C	19°C	17°C	19°C
JUN 7	21°C	19°C	18°C	19°C
JUN 8	21°C	19°C	18°C	19°C
JUN 9	-10°C	20°C	18°C	20°C
JUN 10	22°C	20°C	19°C	20°C
JUN 11	20°C	20°C	19°C	20°C
JUN 12	21°C	20°C	18°C	20°C
JUN 13	21°C	21°C	19°C	21°C
JUN 14	21°C	21°C	19°C	21°C
JUN 15	21°C	21°C	19°C	21°C
JUN 16	21°C	21°C	20°C	21°C
JUN 17	22°C	21°C	20°C	21°C
JUN 18	22°C	21°C	21°C	21°C
JUN 19	23°C	22°C	20°C	22°C
JUN 20	23°C	22°C	21°C	22°C
JUN 21	22°C	22°C	21°C	21°C
JUN 22	22°C	22°C	21°C	21°C
JUN 23	22°C	22°C	21°C	22°C
JUN 24	21°C	22°C	21°C	22°C
JUN 25	22°C	22°C	21°C	22°C
JUN 26	22°C	23°C	22°C	23°C
JUN 27	21°C	23°C	22°C	22°C
JUN 28	21°C	23°C	21°C	22°C
JUN 29	22°C	23°C	21°C	23°C
JUN 30	22°C	23°C	22°C	23°C

June: Climate and Swimming Opportunities

Average Night Air Temperature

18°C

Average Day Air Temperature

27°C

Precipitation Amount per Month

272 mm

Number of Rainy Days

Daylight per Day

14 hrs

Sunshine per Day

5 hrs

Average Wind Speed

11 km/h

Average Humidity

78%

At such water and air temperatures, swimming is pleasant and refreshing rather than hot. After you get in, it feels comfortable, and you’ll warm up quickly when you come out.