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Coastal Waters Forecast for Coastal waters from the Southwest Pass of the Mississippi River to Port Fourchon Louisiana out 20 NM (GMZ553) (Text-Only)
NWS Forecast for: Coastal waters from the Southwest Pass of the Mississippi River to Port Fourchon Louisiana out 20 NM (GMZ553)
Issued by: National Weather Service New Orleans/Baton Rouge, LA
Last Update: 537 PM CDT Fri Sep 4 2026		Print

Tonight: South winds around 5 knots. Seas 1 foot or less. Wave detail: southwest 1 foot at 2 seconds. A slight chance of thunderstorms early this evening. A slight chance of showers this evening. A slight chance of showers and thunderstorms late.

Saturday: Southwest winds around 5 knots. Seas 1 foot or less. Wave detail: west 1 foot at 2 seconds. A chance of showers and thunderstorms.

Saturday Night: Southwest winds around 5 knots. Seas 1 foot or less. A chance of thunderstorms with a slight chance of showers after midnight.

Sunday: West winds around 5 knots. Seas 1 foot or less. Wave detail: northwest 1 foot at 2 seconds. A chance of showers and thunderstorms, mainly in the morning.

Sunday Night: West winds 5 to 10 knots. Seas 1 foot or less. Wave detail: southwest 1 foot at 4 seconds. A slight chance of showers and thunderstorms after midnight.

Monday: Northwest winds 5 to 10 knots, becoming west in the afternoon. Seas 1 foot or less. Wave detail: northwest 1 foot at 3 seconds. A chance of showers and thunderstorms.

Monday Night: Southwest winds around 5 knots. Seas 1 foot or less. Wave detail: west 1 foot at 3 seconds. A slight chance of showers and thunderstorms after midnight.

Tuesday: Northeast winds around 5 knots, becoming southeast in the afternoon. Seas 1 foot or less. A chance of showers and thunderstorms.

Tuesday Night: Southeast winds 5 to 10 knots. Seas 1 foot or less. Wave detail: southeast 1 foot at 2 seconds. A slight chance of showers and thunderstorms in the evening, then a chance of showers and thunderstorms after midnight.

Wednesday: East winds 5 to 10 knots. Seas 1 foot or less. Wave detail: southeast 1 foot at 3 seconds. A chance of thunderstorms. A chance of showers in the morning, then showers likely in the afternoon.

Wednesday Night: Southeast winds around 5 knots. Seas 1 foot or less. A slight chance of showers and thunderstorms.

winds and seas higher in and near thunderstorms.






Zone Forecast: Coastal waters from the Southwest Pass of the Mississippi River to Port Fourchon Louisiana out 20 NM (GMZ553)

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