| NWS Forecast for: Coastal Waters from Port Fourchon LA to Lower Atchafalaya River LA out 20 nm (GMZ551) Issued by: National Weather Service New Orleans/Baton Rouge, LA Last Update: 537 AM CDT Sat Apr 18 2026 | |
Today: South winds 5 to 10 knots. Seas around 2 feet. Wave detail: south 2 feet at 5 seconds. Tonight: Southwest winds 5 to 10 knots, becoming northwest 15 to 20 knots after midnight. Seas 1 to 2 feet. Wave detail: south 1 foot at 5 seconds. A chance of showers with a slight chance of thunderstorms after midnight. Sunday: Northeast winds 25 to 30 knots, diminishing to 20 to 25 knots in the afternoon. Seas 2 to 4 feet, occasionally to 5 feet. Wave detail: north 4 feet at 4 seconds. A chance of showers with a slight chance of thunderstorms in the morning. Sunday Night: Northeast winds 15 to 20 knots, increasing to 20 to 25 knots after midnight. Seas 2 to 4 feet, occasionally to 5 feet. Wave detail: east 4 feet at 5 seconds. Monday: East winds 20 to 25 knots. Seas 3 to 5 feet, occasionally to 6 feet. Wave detail: east 5 feet at 5 seconds. Monday Night: East winds 15 to 20 knots, diminishing to 10 to 15 knots after midnight. Seas 2 to 4 feet, occasionally to 5 feet. Wave detail: east 4 feet at 5 seconds. Tuesday: East winds 15 to 20 knots. Seas 2 to 4 feet, occasionally to 5 feet. Wave detail: east 4 feet at 5 seconds. A slight chance of showers in the afternoon. Tuesday Night: East winds 15 to 20 knots, diminishing to 10 to 15 knots after midnight. Seas 2 to 4 feet, occasionally to 5 feet. Wave detail: southeast 4 feet at 6 seconds. A slight chance of showers. Wednesday: Southeast winds 10 to 15 knots. Seas 2 to 4 feet, occasionally to 5 feet. Wave detail: southeast 4 feet at 7 seconds. A slight chance of showers. Wednesday Night: Southeast winds 15 to 20 knots. Seas 2 to 4 feet, occasionally to 5 feet. Wave detail: southeast 4 feet at 8 seconds. winds and seas higher in and near thunderstorms. | |
| Zone Forecast: Coastal Waters from Port Fourchon LA to Lower Atchafalaya River LA out 20 nm (GMZ551) | |
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