Last Update: 437 PM CST Fri Jan 9 2026
For More Weather Information:
19NM SE Grand Isle LA
Marine Zone Forecast
Tonight
South winds 10 to 15 knots with gusts up to 20 knots. Seas 2 to 4 feet, occasionally to 5 feet. Wave detail: south 4 feet at 7 seconds. A chance of showers and thunderstorms early this evening, then a slight chance of showers and thunderstorms late this evening and early morning. A chance of showers and thunderstorms late.
Saturday
Southwest winds around 10 knots, becoming northwest with gusts up to 20 knots in the afternoon. Seas 2 to 4 feet, occasionally to 5 feet. Wave detail: south 4 feet at 6 seconds and northwest 2 feet at 2 seconds. A chance of thunderstorms. Showers likely, mainly in the morning. Visibility 1 nm or less.
Saturday Night
North winds 20 to 25 knots, increasing to 25 to 30 knots after midnight. Seas 3 to 5 feet, occasionally to 6 feet. Wave detail: north 5 feet at 5 seconds. A slight chance of showers in the evening.
Sunday
North winds 25 to 30 knots, diminishing to 20 to 25 knots in the afternoon. Seas 3 to 5 feet, occasionally to 6 feet. Wave detail: northeast 5 feet at 5 seconds.
Sunday Night
Northeast winds 20 to 25 knots with gusts up to 30 knots. Seas 2 to 4 feet, occasionally to 5 feet. Wave detail: northeast 4 feet at 4 seconds.
Monday
Northeast winds 15 to 20 knots, diminishing to 10 to 15 knots in the afternoon. Seas 2 to 4 feet, occasionally to 5 feet. Wave detail: northeast 4 feet at 4 seconds.
Monday Night
Northeast winds 5 to 10 knots. Seas 1 to 2 feet. Wave detail: northeast 2 feet at 4 seconds.
Tuesday
Northeast winds 5 to 10 knots, diminishing to around 5 knots in the afternoon. Seas 1 to 2 feet. Wave detail: northeast 2 feet at 5 seconds.
Tuesday Night
West winds around 5 knots, increasing to 5 to 10 knots after midnight. Seas 1 foot or less, then 1 to 2 feet after midnight. Wave detail: southeast 1 foot at 6 seconds, becoming west 1 foot at 3 seconds and southeast 1 foot at 6 seconds. A slight chance of showers in the evening, then a chance of showers after midnight.
Wednesday
West winds 10 to 15 knots. Seas 1 to 2 feet, building to 2 to 3 feet in the afternoon. Wave detail: west 2 feet at 3 seconds and southeast 1 foot at 5 seconds, becoming west 3 feet at 4 seconds and southeast 1 foot at 5 seconds. A chance of showers.
Wednesday Night
Northwest winds 15 to 20 knots, increasing to 20 to 25 knots after midnight. Seas 2 to 4 feet, occasionally to 5 feet. A slight chance of showers in the evening.
winds and seas higher in and near thunderstorms.
winds and seas higher in and near thunderstorms.
Winds and seas higher in and near thunderstorms.
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