The highest day temperature in March 2025 was 75°F. The lowest night temperature was 54°F. The average values for day and night temperatures during March were 68.1°F и 65.6°F respectivly.

The average sea surface temperature in March 2025 for Grand Isle was 69.2°F. The maximum and minimum values were 63.0°F and 75.2°F respectively.

You can expect various weather conditions during March. Be ready for sunny, cloudy or even gloomy days.

Precipitation total in March for Grand Isle is 1.0 in.

The average wind speed in March is 13.0 mph. It makes March one of the most windy months of the year for Grand Isle.

We are using day length and cloud cover information for each day of the month to calculate averages for this chart. Average sunny hours for Grand Isle in March is 6.8 hours.