Port Saint Johns — Water Temperature in July

Water Temperature Range

17°C

minimum

21°C

average

24°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	2025	2024	2023	2022
JUL 1	22°C	22°C	22°C	21°C
JUL 2	22°C	22°C	22°C	21°C
JUL 3	22°C	22°C	22°C	21°C
JUL 4	22°C	22°C	23°C	21°C
JUL 5	22°C	22°C	22°C	21°C
JUL 6	22°C	22°C	23°C	21°C
JUL 7	22°C	22°C	22°C	22°C
JUL 8	23°C	22°C	24°C	22°C
JUL 9	22°C	22°C	23°C	21°C
JUL 10	22°C	22°C	23°C	21°C
JUL 11	22°C	21°C	22°C	21°C
JUL 12	22°C	21°C	23°C	20°C
JUL 13	22°C	22°C	23°C	20°C
JUL 14	21°C	21°C	22°C	20°C
JUL 15	21°C	21°C	21°C	20°C
JUL 16	22°C	21°C	21°C	23°C
JUL 17	22°C	21°C	23°C	20°C
JUL 18	22°C	21°C	22°C	21°C
JUL 19	21°C	21°C	22°C	18°C
JUL 20	21°C	21°C	22°C	20°C
JUL 21	21°C	21°C	21°C	20°C
JUL 22	21°C	21°C	21°C	20°C
JUL 23	21°C	21°C	21°C	19°C
JUL 24	21°C	20°C	21°C	19°C
JUL 25	21°C	20°C	22°C	19°C
JUL 26	21°C	21°C	21°C	18°C
JUL 27	21°C	21°C	21°C	18°C
JUL 28	21°C	21°C	20°C	18°C
JUL 29	20°C	21°C	20°C	17°C
JUL 30	21°C	21°C	21°C	18°C
JUL 31	22°C	21°C	22°C	21°C

July: Climate and Swimming Opportunities

Average Night Air Temperature

12°C

Average Day Air Temperature

23°C

Precipitation Amount per Month

39 mm

Number of Rainy Days

Daylight per Day

10 hrs

Sunshine per Day

7 hrs

Average Wind Speed

11 km/h

Average Humidity

70%

With such a ratio between the average monthly temperatures of water and air, swimming feels warm and comfortable even if the day isn’t hot. The water can feel warmer than the air, so getting out may feel a bit cool.