| 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: 1127 AM CST Sat Nov 22 2025 | |
| This Afternoon: West winds around 5 knots. Seas 1 to 2 feet. Wave detail: south 2 feet at 5 seconds. Widespread dense fog late. Tonight: West winds 5 to 10 knots, becoming northwest after midnight. Seas 1 to 2 feet. Wave detail: northwest 2 feet at 3 seconds and south 2 feet at 5 seconds. Widespread dense fog in the evening. Sunday: Northeast winds 5 to 10 knots. Seas 1 to 2 feet. Wave detail: northwest 1 foot at 3 seconds and northeast 1 foot at 3 seconds. Sunday Night: East winds 5 to 10 knots. Seas 1 foot or less. Wave detail: east 1 foot at 2 seconds and southeast 1 foot at 6 seconds. Monday: Southeast winds 5 to 10 knots. Seas 1 to 2 feet. Wave detail: southeast 2 feet at 4 seconds. Monday Night: 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 5 seconds. A slight chance of showers. A slight chance of thunderstorms after midnight. Tuesday: South winds 10 to 15 knots, diminishing to 5 to 10 knots in the afternoon. Seas 2 to 3 feet. Wave detail: south 3 feet at 6 seconds. A chance of showers. A slight chance of thunderstorms in the afternoon. Tuesday Night: Southwest winds around 5 knots, becoming west after midnight. Seas around 2 feet. Wave detail: south 2 feet at 6 seconds. A chance of showers with a slight chance of thunderstorms. Wednesday: North winds 10 to 15 knots. Seas 2 to 4 feet, occasionally to 5 feet. Wave detail: north 2 feet at 2 seconds and south 2 feet at 6 seconds. A chance of showers. Wednesday Night: North winds 20 to 25 knots. Seas 2 to 4 feet, occasionally to 5 feet. Wave detail: northeast 3 feet at 3 seconds and southeast 2 feet at 7 seconds. A slight chance of showers in the evening. 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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