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: 1026 PM CST Fri Mar 6 2026


Overnight: Southeast winds 10 to 15 knots with gusts up to 20 knots. Seas around 4 feet, occasionally to 5 feet. Wave detail: southeast 4 feet at 7 seconds.

Saturday: Southeast winds 10 to 15 knots. Seas 3 to 4 feet, occasionally to 5 feet. Wave detail: southeast 4 feet at 7 seconds. A slight chance of showers and thunderstorms in the afternoon.

Saturday Night: Southeast winds around 10 knots. Seas 3 to 4 feet, occasionally to 5 feet. Wave detail: southeast 4 feet at 7 seconds. A chance of showers and thunderstorms, mainly in the evening.

Sunday: Southeast winds 5 to 10 knots. Seas 3 to 4 feet, occasionally to 5 feet. Wave detail: southeast 4 feet at 8 seconds. A chance of showers and thunderstorms.

Sunday Night: Southeast winds 5 to 10 knots. Seas around 3 feet. Wave detail: southeast 3 feet at 8 seconds and southwest 1 foot at 5 seconds. A slight chance of showers in the evening.

Monday: Southeast winds 5 to 10 knots. Seas around 3 feet. Wave detail: south 3 feet at 6 seconds.

Monday Night: Southeast winds 5 to 10 knots. Seas around 3 feet. Wave detail: south 3 feet at 6 seconds.

Tuesday: Southeast winds 10 to 15 knots. Seas around 3 feet. Wave detail: south 3 feet at 6 seconds.

Tuesday Night: Southeast winds 10 to 15 knots. Seas 3 to 4 feet, occasionally to 5 feet. Wave detail: southeast 4 feet at 6 seconds.

Wednesday: South winds 15 to 20 knots. Seas 4 to 5 feet, occasionally to 6 feet. Wave detail: southeast 5 feet at 7 seconds. A chance of showers with a slight chance of thunderstorms in the afternoon.

Wednesday Night: Southwest winds 15 to 20 knots, becoming northwest 25 to 30 knots after midnight. Seas 5 to 6 feet, occasionally to 8 feet, building to 5 to 8 feet, occasionally to 10 feet after midnight. A chance of showers. A slight chance of thunderstorms in the evening, then a chance of thunderstorms 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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