Port Denison — Water Temperature in July

Water Temperature Range

18°C

minimum

21°C

average

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

July: Climate and Swimming Opportunities

Average Night Air Temperature

9°C

Average Day Air Temperature

18°C

Precipitation Amount per Month

153 mm

Number of Rainy Days

Daylight per Day

10 hrs

Sunshine per Day

5 hrs

Average Wind Speed

15 km/h

Average Humidity

71%

With such a ratio between the average monthly temperatures of water and air, swimming can feel slightly cool at first but still quite doable. It’s more comfortable if the sun is out, and you may want a towel or hoodie right after.