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: 412 PM CDT Wed Oct 7 2026




Tonight: Northeast winds around 20 knots with gusts up to 25 knots. Seas 5 to 7 feet, occasionally to 9 feet. Wave detail: east 7 feet at 7 seconds. A slight chance of thunderstorms. A slight chance of showers this evening, then a chance of showers after midnight.

Thursday: Northeast winds 20 to 25 knots with gusts up to 30 knots. Seas 6 to 7 feet, occasionally to 9 feet. Wave detail: east 7 feet at 7 seconds. A chance of showers in the morning. A chance of thunderstorms. Showers likely in the afternoon.

Thursday Night: East winds 25 to 30 knots. Seas 7 to 9 feet, occasionally to 11 feet. Wave detail: east 9 feet at 8 seconds. Showers likely with a chance of thunderstorms early in the evening, then a chance of showers with a slight chance of thunderstorms late in the evening. Showers with a chance of thunderstorms after midnight.

Friday: Northeast winds 25 to 30 knots with gusts up to 40 knots. Seas 9 to 13 feet, occasionally to 17 feet, building to 11 to 15 feet, occasionally to 19 feet in the afternoon. Wave detail: northeast 15 feet at 11 seconds. Showers with a chance of thunderstorms.

Friday Night: North winds 25 to 30 knots with gusts up to 40 knots, diminishing to 15 to 20 knots after midnight. Seas 10 to 14 feet, occasionally to 18 feet, subsiding to 6 to 9 feet, occasionally to 11 feet after midnight. Wave detail: northeast 14 feet at 11 seconds. Showers with a chance of thunderstorms until early morning, then showers likely with a slight chance of thunderstorms late.

Saturday: Northwest winds 5 to 10 knots. Seas 4 to 6 feet, occasionally to 8 feet. Wave detail: east 6 feet at 9 seconds and northwest 2 feet at 4 seconds. A slight chance of thunderstorms in the morning. Showers likely until late afternoon, then a chance of showers late.

Saturday Night: North winds 5 to 10 knots. Seas 2 to 4 feet, occasionally to 5 feet. Wave detail: southeast 4 feet at 8 seconds and northwest 2 feet at 4 seconds. A chance of showers early in the evening, then a slight chance of showers in the late evening and overnight.

Sunday: East winds 5 to 10 knots. Seas around 2 feet. Wave detail: east 2 feet at 7 seconds and northwest 1 foot at 3 seconds. A chance of showers.

Sunday Night: East winds around 10 knots. Seas around 2 feet. Wave detail: east 2 feet at 6 seconds. A chance of showers early in the evening. A slight chance of showers after midnight.

Monday: East winds around 10 knots. Seas around 2 feet. Wave detail: east 2 feet at 6 seconds. A chance of showers.

Monday Night: East winds 5 to 10 knots. Seas around 2 feet in the evening, then 1 foot or less. A chance of showers early 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)

Visit your local NWS office at: https://www.weather.gov/lix