| NWS Forecast for: Coastal Waters from Port Fourchon LA to Lower Atchafalaya River LA out 20 nm (GMZ550) Issued by: National Weather Service New Orleans/Baton Rouge, LA Last Update: 712 PM CST Wed Dec 3 2025 |  |
| Tonight: East winds 5 to 10 knots, becoming southeast 10 to 15 knots with gusts up to 20 knots late this evening and overnight. Seas 2 to 3 feet. Wave detail: east 2 feet at 3 seconds and southeast 1 foot at 6 seconds. A slight chance of showers late this evening. A chance of showers after midnight, then showers likely late. Thursday: East winds 10 to 15 knots with gusts up to 25 knots. Seas 2 to 3 feet. Wave detail: southeast 3 feet at 4 seconds. A chance of showers with a slight chance of thunderstorms in the morning, then showers with a chance of thunderstorms in the afternoon. Thursday Night: East winds 10 to 15 knots with gusts up to 20 knots, becoming southwest after midnight. Seas 2 to 3 feet. Wave detail: east 3 feet at 5 seconds. A slight chance of thunderstorms. Showers. Friday: Northwest winds 10 to 15 knots. Seas 2 to 3 feet. Wave detail: west 3 feet at 5 seconds. A slight chance of thunderstorms in the morning. Showers. Friday Night: Northeast winds 5 to 10 knots. Seas 1 to 2 feet. Wave detail: southwest 2 feet at 5 seconds and northeast 1 foot at 3 seconds. Showers likely. Saturday: Northeast winds around 10 knots. Seas 1 to 2 feet. Wave detail: northeast 2 feet at 3 seconds and south 1 foot at 5 seconds. A slight chance of thunderstorms. Showers. Saturday Night: Northeast winds 5 to 10 knots. Seas 1 to 2 feet. Wave detail: south 2 feet at 5 seconds and northeast 1 foot at 3 seconds. A chance of thunderstorms. Showers likely, mainly in the evening. Sunday: North winds around 10 knots. Seas 1 to 2 feet. Wave detail: south 2 feet at 5 seconds and northeast 1 foot at 3 seconds. A slight chance of showers and thunderstorms in the morning. Sunday Night: North winds 10 to 15 knots, increasing to 15 to 20 knots after midnight. Seas 1 to 2 feet, building to 2 to 3 feet after midnight. Wave detail: northwest 2 feet at 4 seconds, becoming north 3 feet at 4 seconds. Monday: North winds 15 to 20 knots, diminishing to 10 to 15 knots in the afternoon. Seas 2 to 3 feet. Wave detail: north 3 feet at 4 seconds. Monday Night: Northeast winds 10 to 15 knots. Seas 1 to 2 feet. winds and seas higher in and near thunderstorms. | |
| Zone Forecast: Coastal Waters from Port Fourchon LA to Lower Atchafalaya River LA out 20 nm (GMZ550) | |
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