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Coastal Waters Forecast for Coastal waters from Port Fourchon Louisiana to Lower Atchafalaya River LA from 20 to 60 NM (GMZ570) (Text-Only)
NWS Forecast for: Coastal waters from Port Fourchon Louisiana to Lower Atchafalaya River LA from 20 to 60 NM (GMZ570)
Issued by: National Weather Service New Orleans/Baton Rouge, LA
Last Update: 312 PM CDT Sun Oct 4 2026		Print

This Afternoon: Southeast winds around 5 knots. Seas around 3 feet. Wave detail: southeast 3 feet at 7 seconds. Showers likely with a chance of thunderstorms.

Tonight: East winds 5 to 10 knots. Seas 2 to 3 feet. Wave detail: southeast 3 feet at 7 seconds. A chance of thunderstorms. A chance of showers in the evening, then showers likely after midnight.

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.

Monday Night: Northeast winds 10 to 15 knots with gusts up to 20 knots. Seas 2 to 3 feet. Wave detail: east 3 feet at 5 seconds. Showers. A chance of thunderstorms, mainly in the evening.

Tuesday: Northeast winds 10 to 15 knots with gusts up to 20 knots. Seas 2 to 3 feet. Wave detail: east 3 feet at 5 seconds. Showers with a chance of thunderstorms.

Tuesday Night: Northeast winds 15 to 20 knots with gusts up to 25 knots. Seas 3 to 4 feet, occasionally to 5 feet. Wave detail: east 4 feet at 5 seconds. Showers likely with a slight chance of thunderstorms.

Wednesday: Northeast winds 15 to 20 knots, increasing to 20 to 25 knots in the afternoon. Seas 4 to 6 feet, occasionally to 8 feet. Wave detail: northeast 5 feet at 5 seconds. A chance of thunderstorms. Showers.

Wednesday Night: East winds 20 to 25 knots. Seas 6 to 8 feet, occasionally to 10 feet. Wave detail: east 8 feet at 7 seconds. Showers likely with a chance of thunderstorms.

Thursday: East winds 20 to 25 knots. Seas 7 to 8 feet, occasionally to 10 feet. Wave detail: east 8 feet at 7 seconds. A chance of thunderstorms. Showers.

Thursday Night: East winds 25 to 30 knots. Seas 9 to 11 feet, occasionally to 14 feet. Wave detail: east 10 feet at 8 seconds. Showers likely. A chance of thunderstorms in the evening, then thunderstorms likely after midnight.

winds and seas higher in and near thunderstorms.






Zone Forecast: Coastal waters from Port Fourchon Louisiana to Lower Atchafalaya River LA from 20 to 60 NM (GMZ570)

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