Grand Isle — Water Temperature in April

Water Temperature Range

18°C

minimum

22°C

average

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

April: Climate and Swimming Opportunities

Average Night Air Temperature

15°C

Average Day Air Temperature

24°C

Precipitation Amount per Month

99 mm

Number of Rainy Days

Daylight per Day

13 hrs

Sunshine per Day

9 hrs

Average Wind Speed

14 km/h

Average Humidity

72%

With such a ratio between the average monthly temperatures of water and air, swimming feels warm and comfortable even if the day isn’t hot. The water can feel warmer than the air, so getting out may feel a bit cool.