National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Coastal Waters Forecast for Coastal waters from the Southwest Pass of the Mississippi River to Port Fourchon Louisiana out 20 NM (GMZ552) (Text-Only)
NWS Forecast for: Coastal waters from the Southwest Pass of the Mississippi River to Port Fourchon Louisiana out 20 NM (GMZ552)
Issued by: National Weather Service New Orleans/Baton Rouge, LA
Last Update: 1226 PM CDT Sun Sep 7 2025

This Afternoon: Northeast winds 10 to 15 knots with gusts up to 20 knots. Seas 1 to 2 feet. Wave detail: northeast 2 feet at 4 seconds. A slight chance of showers and thunderstorms late.

Tonight: Northeast 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: northeast 2 feet at 4 seconds, becoming northeast 3 feet at 4 seconds. A slight chance of showers and thunderstorms.

Monday: Northeast winds 15 to 20 knots, diminishing to 10 to 15 knots in the afternoon. Seas 2 to 4 feet, occasionally to 5 feet. Wave detail: northeast 3 feet at 4 seconds.

Monday Night: Northeast winds 10 to 15 knots. Seas 1 to 2 feet. Wave detail: northeast 2 feet at 4 seconds. A slight chance of showers. A slight chance of thunderstorms after midnight.

Tuesday: Northeast winds 10 to 15 knots. Seas 2 to 3 feet. Wave detail: northeast 2 feet at 3 seconds. A chance of showers and thunderstorms.

Tuesday Night: East winds 10 to 15 knots with gusts up to 20 knots. Seas 2 to 3 feet. Wave detail: east 3 feet at 4 seconds. A chance of showers and thunderstorms.

Wednesday: Northeast winds 10 to 15 knots. Seas 2 to 3 feet. Wave detail: east 3 feet at 4 seconds. A chance of showers and thunderstorms.

Wednesday Night: East winds 10 to 15 knots. Seas 2 to 3 feet. Wave detail: east 3 feet at 4 seconds. A slight chance of thunderstorms. A chance of showers, mainly in the evening.

Thursday: Northeast winds 10 to 15 knots. Seas 2 to 3 feet. Wave detail: east 3 feet at 4 seconds. A chance of showers and thunderstorms.

Thursday Night: East winds 10 to 15 knots, diminishing to 5 to 10 knots after midnight. Seas 2 to 3 feet, subsiding to 1 to 2 feet after midnight. Wave detail: east 3 feet at 4 seconds, becoming east 2 feet at 5 seconds. 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 (GMZ552)

Visit your local NWS office at: https://www.weather.gov/lix