Coastal Waters Forecast for Coastal Waters from Boothville LA to Southwest Pass of the Mississippi River out 20 nm (GMZ554) (Text-Only)
NWS Forecast for: Coastal Waters from Boothville LA to Southwest Pass of the Mississippi River out 20 nm (GMZ554)
Issued by: National Weather Service New Orleans/Baton Rouge, LA
Last Update: 535 PM CDT Sun Oct 4 2026


Tonight: Northwest winds 5 to 10 knots, becoming northeast late this evening and overnight. Seas 2 to 3 feet. Wave detail: southeast 3 feet at 7 seconds. A chance of thunderstorms.

Monday: Northeast winds 10 to 15 knots. Seas 2 to 3 feet. Wave detail: northeast 2 feet at 3 seconds and southeast 2 feet at 6 seconds. A chance of thunderstorms. Showers likely.

Monday Night: Northeast winds 10 to 15 knots. Seas 2 to 3 feet. Wave detail: east 2 feet at 5 seconds. Showers likely with a chance of thunderstorms.

Tuesday: Northeast winds 15 to 20 knots. Seas 2 to 4 feet, occasionally to 5 feet. Wave detail: east 4 feet at 6 seconds. Showers with a chance of thunderstorms.

Tuesday Night: Northeast winds 15 to 20 knots with gusts up to 25 knots. Seas 3 to 5 feet, occasionally to 6 feet. Wave detail: east 5 feet at 6 seconds. Showers likely with a slight chance of thunderstorms.

Wednesday: East winds 20 to 25 knots with gusts up to 30 knots. Seas 4 to 6 feet, occasionally to 8 feet. Wave detail: east 6 feet at 7 seconds. Showers likely with a chance of thunderstorms in the morning, then a chance of showers with a slight chance of thunderstorms in the afternoon.

Wednesday Night: East winds 20 to 25 knots with gusts up to 30 knots. Seas 5 to 7 feet, occasionally to 9 feet. Wave detail: east 7 feet at 7 seconds. A chance of showers with a slight chance of thunderstorms.

Thursday: East winds 20 to 25 knots, increasing to 25 to 30 knots in the afternoon. Seas 4 to 6 feet, occasionally to 8 feet, building to 5 to 8 feet, occasionally to 10 feet in the afternoon. Wave detail: east 6 feet at 7 seconds, becoming east 8 feet at 7 seconds. A chance of thunderstorms. Showers likely, mainly in the morning.

Thursday Night: East winds 25 to 30 knots, diminishing to 20 to 25 knots after midnight. Seas 5 to 8 feet, occasionally to 10 feet. Wave detail: east 8 feet at 7 seconds. A chance of showers with a slight chance of thunderstorms in the evening, then showers likely with a chance of thunderstorms after midnight.

Friday: East winds 25 to 30 knots. Seas 6 to 9 feet, occasionally to 11 feet. Wave detail: east 9 feet at 8 seconds. A chance of thunderstorms. Showers likely in the morning, then showers in the afternoon.

Friday Night: Southeast winds 25 to 30 knots. Seas 8 to 11 feet, occasionally to 14 feet. Showers with a chance of thunderstorms.

winds and seas higher in and near thunderstorms.







Zone Forecast: Coastal Waters from Boothville LA to Southwest Pass of the Mississippi River out 20 nm (GMZ554)

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