Waterloo — Water Temperature in July

Water Temperature Range

13°C

minimum

16°C

average

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

July: Climate and Swimming Opportunities

Average Night Air Temperature

13°C

Average Day Air Temperature

22°C

Precipitation Amount per Month

61 mm

Number of Rainy Days

Daylight per Day

16 hrs

Sunshine per Day

5 hrs

Average Wind Speed

15 km/h

Average Humidity

79%

At such water and air temperatures, swimming feels cool and invigorating. It’s comfortable for a quick dip, and you’ll feel fine as long as you warm up soon after.