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Last Update: 201 PM CDT Tue Oct 20 2026
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20NM SSE Grand Isle LA
Marine Zone Forecast
This Afternoon
Northeast winds around 15 knots with gusts up to 20 knots. Seas 3 to 5 feet, occasionally to 6 feet. Wave detail: east 5 feet at 7 seconds.
Tonight
Northeast winds 10 to 15 knots with gusts up to 20 knots. Seas 2 to 4 feet, occasionally to 5 feet. Wave detail: east 4 feet at 7 seconds.
Wednesday
Northeast winds 10 to 15 knots. Seas 2 to 3 feet. Wave detail: southeast 3 feet at 6 seconds and northeast 2 feet at 2 seconds.
Wednesday Night
Northeast winds 10 to 15 knots. Seas 2 to 3 feet. Wave detail: southeast 3 feet at 6 seconds and northeast 2 feet at 3 seconds.
Thursday
Northeast winds 10 to 15 knots, diminishing to 5 to 10 knots in the afternoon. Seas 2 to 3 feet. Wave detail: northeast 2 feet at 4 seconds.
Thursday Night
Northeast winds 5 to 10 knots. Seas around 2 feet. Wave detail: southeast 2 feet at 5 seconds and northeast 1 foot at 2 seconds.
Friday
Northeast winds around 10 knots. Seas around 2 feet. Wave detail: east 2 feet at 4 seconds.
Friday Night
East winds 15 to 20 knots. Seas 3 to 5 feet, occasionally to 6 feet. Wave detail: east 5 feet at 6 seconds and east 2 feet at 2 seconds.
Saturday
East winds 15 to 20 knots, becoming northeast 20 to 25 knots in the afternoon. Seas 3 to 5 feet, occasionally to 6 feet, building to 5 to 7 feet, occasionally to 9 feet in the afternoon. Wave detail: east 5 feet at 7 seconds, becoming east 7 feet at 8 seconds.
Saturday Night
Northeast winds 20 to 25 knots, becoming east 25 to 30 knots after midnight. Seas 6 to 9 feet, occasionally to 11 feet. Wave detail: east 9 feet at 8 seconds.
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