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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: 1202 PM CST Tue Feb 3 2026



This Afternoon: South winds 10 to 15 knots. Seas 2 to 3 feet. Wave detail: south 3 feet at 5 seconds.

Tonight: Southwest winds 10 to 15 knots with gusts up to 20 knots. Seas 2 to 4 feet, occasionally to 5 feet. Wave detail: south 3 feet at 5 seconds. A chance of showers with a slight chance of thunderstorms after midnight.

Wednesday: Northwest winds 15 to 20 knots, becoming north in the afternoon. Seas 3 to 4 feet, occasionally to 5 feet, building to 4 to 6 feet, occasionally to 8 feet in the afternoon. Wave detail: west 4 feet at 5 seconds, becoming northwest 5 feet at 5 seconds. A slight chance of thunderstorms. Showers, mainly in the morning.

Wednesday Night: North winds 20 to 25 knots with gusts up to 30 knots. Seas 5 to 8 feet, occasionally to 10 feet. Wave detail: north 7 feet at 6 seconds.

Thursday: North winds 20 to 25 knots, diminishing to 15 to 20 knots in the afternoon. Seas 5 to 7 feet, occasionally to 9 feet. Wave detail: north 6 feet at 6 seconds.

Thursday Night: Northwest winds 10 to 15 knots. Seas 2 to 4 feet, occasionally to 5 feet. Wave detail: north 3 feet at 5 seconds.

Friday: Northwest winds 10 to 15 knots, becoming west 15 to 20 knots in the afternoon. Seas 2 to 4 feet, occasionally to 5 feet. Wave detail: west 4 feet at 5 seconds and northeast 1 foot at 4 seconds.

Friday Night: West winds 15 to 20 knots, becoming northwest 10 to 15 knots after midnight. Seas 3 to 4 feet, occasionally to 5 feet. Wave detail: west 4 feet at 5 seconds.

Saturday: Northwest winds 10 to 15 knots, becoming north 5 to 10 knots in the afternoon. Seas 2 to 3 feet. Wave detail: northwest 3 feet at 5 seconds.

Saturday Night: West winds around 5 knots. Seas around 2 feet in the evening, then 1 foot or less. Wave detail: west 2 feet at 5 seconds and northeast 1 foot at 3 seconds, becoming west 1 foot at 5 seconds.

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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