Olympiaki Akti — Water Temperature in April

Water Temperature Range

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

April: Climate and Swimming Opportunities

Average Night Air Temperature

9°C

Average Day Air Temperature

19°C

Precipitation Amount per Month

39 mm

Number of Rainy Days

Daylight per Day

13 hrs

Sunshine per Day

7 hrs

Average Wind Speed

10 km/h

Average Humidity

68%

At such water and air temperatures, swimming often feels chilly and is best for short swims. Getting out can feel cold, so it helps to have dry clothes ready right away.