| 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: 537 AM CDT Wed Mar 11 2026 | |
Today: South winds 10 to 15 knots with gusts up to 25 knots. Seas 3 to 4 feet, occasionally to 5 feet. Wave detail: southeast 4 feet at 6 seconds. Tonight: South winds 15 to 20 knots, becoming southwest 25 to 30 knots after midnight. Seas 4 to 5 feet, occasionally to 6 feet, building to 5 to 7 feet, occasionally to 9 feet after midnight. Wave detail: south 5 feet at 6 seconds, becoming south 6 feet at 6 seconds. A chance of thunderstorms. A chance of showers in the evening, then showers after midnight. Thursday: North winds 25 to 30 knots. Seas 8 to 11 feet, occasionally to 14 feet. Wave detail: north 9 feet at 7 seconds and northwest 8 feet at 8 seconds. A chance of showers and thunderstorms in the morning. Thursday Night: Northeast winds 20 to 25 knots with gusts up to 30 knots, diminishing to 15 to 20 knots after midnight. Seas 5 to 8 feet, occasionally to 10 feet, subsiding to 4 to 6 feet, occasionally to 8 feet after midnight. Wave detail: northeast 8 feet at 8 seconds and south 3 feet at 7 seconds, becoming north 6 feet at 6 seconds and southeast 1 foot at 7 seconds. Friday: Northeast winds 10 to 15 knots, diminishing to 5 to 10 knots in the afternoon. Seas 2 to 4 feet, occasionally to 5 feet. Wave detail: east 4 feet at 7 seconds. Friday Night: East winds 5 to 10 knots. Seas 2 to 3 feet. Wave detail: east 2 feet at 6 seconds. Saturday: East winds 5 to 10 knots. Seas around 2 feet. Wave detail: east 2 feet at 6 seconds. Saturday Night: East winds 5 to 10 knots, becoming southeast after midnight. Seas around 2 feet. Wave detail: east 2 feet at 6 seconds. Sunday: South winds around 10 knots. Seas around 2 feet. Wave detail: south 2 feet at 5 seconds. Sunday Night: Southwest winds around 10 knots, becoming west after midnight. Seas around 2 feet. Wave detail: southwest 2 feet at 4 seconds. A slight chance of showers and 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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