Marietta — Water Temperature in August

Water Temperature Range

10°C

minimum

13°C

average

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

August: Climate and Swimming Opportunities

Average Night Air Temperature

14°C

Average Day Air Temperature

22°C

Precipitation Amount per Month

49 mm

Number of Rainy Days

Daylight per Day

14 hrs

Sunshine per Day

8 hrs

Average Wind Speed

9 km/h

Average Humidity

76%

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.