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: 1037 AM CDT Mon Sep 7 2026


This Afternoon: Northwest winds 5 to 10 knots. Seas around 2 feet early, then 1 foot or less. Wave detail: northwest 1 foot at 3 seconds. A chance of showers and thunderstorms late this morning and early afternoon.

Tonight: West winds around 5 knots. Seas 1 foot or less. Wave detail: west 1 foot at 3 seconds. A slight chance of showers and thunderstorms after midnight.

Tuesday: Northwest winds around 5 knots, becoming northeast in the afternoon. Seas 1 foot or less. Wave detail: northeast 1 foot at 2 seconds and west 1 foot at 2 seconds. A chance of thunderstorms. Showers likely, mainly in the morning.

Tuesday Night: East winds 5 to 10 knots. Seas 1 foot or less. Wave detail: east 1 foot at 3 seconds. A slight chance of thunderstorms. A slight chance of showers in the evening, then a chance of showers after midnight.

Wednesday: Southeast winds around 5 knots. Seas 1 foot or less. Wave detail: southeast 1 foot at 3 seconds. A chance of thunderstorms. Showers, mainly in the morning.

Wednesday Night: Southeast winds 5 to 10 knots. Seas 1 foot or less. Wave detail: southeast 1 foot at 4 seconds. A chance of showers and thunderstorms after midnight.

Thursday: Southwest winds 5 to 10 knots. Seas 1 foot or less. Wave detail: south 1 foot at 4 seconds. A chance of thunderstorms. Showers likely, mainly in the morning.

Thursday Night: Southwest winds 5 to 10 knots. Seas 1 foot or less. Wave detail: south 1 foot at 3 seconds. A chance of showers and thunderstorms after midnight.

Friday: West winds 5 to 10 knots. Seas 1 foot or less. Wave detail: south 1 foot at 4 seconds. A chance of thunderstorms. Showers likely, mainly in the morning.

Friday Night: Southwest winds 5 to 10 knots. Seas 1 foot or less. Wave detail: south 1 foot at 4 seconds. A slight chance of showers and thunderstorms.

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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