Niigata — Water Temperature in July

Water Temperature Range

20°C

minimum

24°C

average

28°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
JUL 1	-10°C	23°C	21°C	22°C
JUL 2	23°C	22°C	22°C	23°C
JUL 3	23°C	22°C	22°C	24°C
JUL 4	23°C	22°C	21°C	25°C
JUL 5	23°C	23°C	23°C	24°C
JUL 6	23°C	22°C	22°C	23°C
JUL 7	23°C	22°C	23°C	24°C
JUL 8	24°C	23°C	23°C	24°C
JUL 9	24°C	23°C	24°C	23°C
JUL 10	24°C	23°C	24°C	23°C
JUL 11	24°C	23°C	24°C	23°C
JUL 12	26°C	24°C	25°C	24°C
JUL 13	26°C	24°C	25°C	23°C
JUL 14	25°C	24°C	25°C	23°C
JUL 15	26°C	24°C	25°C	24°C
JUL 16	26°C	24°C	25°C	24°C
JUL 17	26°C	24°C	24°C	24°C
JUL 18	27°C	25°C	26°C	26°C
JUL 19	27°C	25°C	26°C	26°C
JUL 20	26°C	25°C	25°C	26°C
JUL 21	27°C	25°C	26°C	27°C
JUL 22	28°C	26°C	26°C	27°C
JUL 23	28°C	26°C	26°C	27°C
JUL 24	28°C	26°C	26°C	27°C
JUL 25	28°C	26°C	26°C	27°C
JUL 26	28°C	26°C	27°C	28°C
JUL 27	28°C	26°C	27°C	28°C
JUL 28	28°C	26°C	27°C	28°C
JUL 29	28°C	26°C	28°C	27°C
JUL 30	28°C	26°C	27°C	27°C
JUL 31	27°C	26°C	28°C	27°C

July: Climate and Swimming Opportunities

Average Night Air Temperature

20°C

Average Day Air Temperature

30°C

Precipitation Amount per Month

156 mm

Number of Rainy Days

Daylight per Day

14 hrs

Sunshine per Day

5 hrs

Average Wind Speed

9 km/h

Average Humidity

79%

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.