Weather in Grand Isle: April
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Average day temperature: | 72.6°F |
| Average night temperature: | 69.8°F | |
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Sea water temperature: | 73.6°F |
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Number of sunny days: | 12 days |
| Day length: | 12.5 - 13.3 hours | |
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Number of rainy days: | 2 days |
| Precipitation totals: | 1.1 in. | |
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forecast
| Grand Isle |
temperature
| Grand Isle |
Air temperature in April, °F
The highest day temperature during April of 2026 was 77°F. At the same time the lowest night temperature was 66°F. Daily and nightly averages during April were 72.6°F and 72.0°F.
Sea water temperature in Grand Isle in April, °F
The average sea water temperature in April of 2026 was 74.5°F. The highest and lowest sea temperatures during the month were 78.3°F and 71.8°F.
Number of sunny, partly cloudy and cloudy days in April is almost equal.
Precipitation total in April, in.
Precipitation total value in Grand Isle in April is 1.1 in. Other months of the year show relatively similar values.
The average wind speed value in April is 13.2 mph It makes April one of the most windy months of the year.
This chart shows average number of hours during the day when sunlight can reach the ground. It depends on day length and cloudiness during the day. The average number of sunny hours in April is: 7.7.
Best time for vacation in Grand Isle
Grand Isle on a weather map
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