Saint John — Water Temperature in August

Water Temperature Range

12°C

minimum

14°C

average

17°C

maximum

Get instant access to real-time water temperatures for this and all other locations with our iOS and Android apps.

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

August: Climate and Swimming Opportunities

Average Night Air Temperature

11°C

Average Day Air Temperature

18°C

Precipitation Amount per Month

85 mm

Number of Rainy Days

Daylight per Day

15 hrs

Sunshine per Day

5 hrs

Average Wind Speed

16 km/h

Average Humidity

86%

With such a ratio between the average monthly temperatures of water and air, swimming feels very cold and is only for cold-water enthusiasts. Most people will prefer just a brief splash, because warming up afterward can take time.