Rumson — Water Temperature in July

Water Temperature Range

19°C

minimum

24°C

average

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

July: Climate and Swimming Opportunities

Average Night Air Temperature

14°C

Average Day Air Temperature

28°C

Precipitation Amount per Month

162 mm

Number of Rainy Days

Daylight per Day

14 hrs

Sunshine per Day

8 hrs

Average Wind Speed

11 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.