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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: 503 PM CST Mon Feb 9 2026		Print

Tonight: South winds 5 to 10 knots. Seas 1 foot or less. Wave detail: southeast 1 foot at 3 seconds. Patchy dense fog late.

Tuesday: South winds 5 to 10 knots. Seas 1 foot or less, then around 2 feet in the afternoon. Wave detail: south 1 foot at 3 seconds.

Tuesday Night: Southeast winds 5 to 10 knots. Seas around 2 feet. Wave detail: south 1 foot at 4 seconds. A slight chance of showers.

Wednesday: Southeast winds around 5 knots. Seas around 2 feet. Wave detail: south 2 feet at 6 seconds. A chance of showers.

Wednesday Night: North winds around 5 knots. Seas around 2 feet. Wave detail: south 2 feet at 6 seconds. A slight chance of showers.

Thursday: Northeast winds around 5 knots. Seas around 2 feet. Wave detail: southeast 2 feet at 6 seconds. A slight chance of showers.

Thursday Night: Southeast winds around 5 knots. Seas around 2 feet. Wave detail: southeast 2 feet at 6 seconds. A slight chance of showers.

Friday: Southeast winds 5 to 10 knots. Seas around 2 feet. Wave detail: southeast 2 feet at 3 seconds and southeast 2 feet at 6 seconds. A chance of showers, mainly in the morning.

Friday Night: Southeast winds 10 to 15 knots. Seas 2 to 3 feet. Wave detail: southeast 2 feet at 4 seconds. A slight chance of showers.

Saturday: Southeast winds 15 to 20 knots, becoming south 20 to 25 knots in the afternoon. Seas 2 to 4 feet, occasionally to 5 feet, building to 4 to 6 feet, occasionally to 8 feet in the afternoon. Wave detail: southeast 4 feet at 4 seconds, becoming south 6 feet at 6 seconds. A chance of showers.

Saturday Night: Southwest winds 20 to 25 knots. Seas 5 to 8 feet, occasionally to 10 feet. A slight chance of thunderstorms. Showers likely, mainly in the evening.

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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