| 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: 246 PM CDT Tue May 20 2025 |  |
| Tonight: Southwest winds 10 to 15 knots. Seas 2 to 4 feet, occasionally to 5 feet. Wave detail: south 3 feet at 6 seconds. Wednesday: West winds 5 to 10 knots, becoming southwest in the afternoon. Seas around 2 feet. Wave detail: south 2 feet at 7 seconds. A slight chance of showers and thunderstorms. Wednesday Night: South winds around 5 knots. Seas 1 to 2 feet. Wave detail: south 2 feet at 6 seconds. A slight chance of showers and thunderstorms after midnight. Thursday: Northwest winds around 5 knots, becoming south in the afternoon. Seas 1 to 2 feet. Wave detail: south 2 feet at 6 seconds. A slight chance of showers and thunderstorms in the morning. Thursday Night: South winds around 5 knots. Seas 1 to 2 feet in the evening, then 1 foot or less. Wave detail: south 2 feet at 6 seconds, becoming south 1 foot at 5 seconds. Friday: North winds around 5 knots, becoming east in the afternoon. Seas 1 foot or less. Wave detail: east 1 foot at 2 seconds and south 1 foot at 5 seconds. Friday Night: Southeast winds 5 to 10 knots. Seas 1 foot or less, then around 2 feet after midnight. Wave detail: southeast 1 foot at 4 seconds, becoming south 1 foot at 4 seconds. Saturday: Southeast winds 5 to 10 knots. Seas 1 to 2 feet. Wave detail: southeast 2 feet at 3 seconds. Saturday Night: Southeast winds 10 to 15 knots. Seas around 2 feet. Wave detail: south 2 feet at 4 seconds. Sunday: South winds around 10 knots. Seas around 2 feet. Wave detail: south 2 feet at 4 seconds. Sunday Night: South winds 10 to 15 knots. Seas 2 to 3 feet. A slight chance of showers and thunderstorms after midnight. 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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