| 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 PM CDT Sat Apr 18 2026 | |
Tonight: South winds 5 to 10 knots, becoming northwest after midnight, then becoming north 15 to 20 knots with gusts up to 25 knots late. Seas around 2 feet. Wave detail: south 2 feet at 5 seconds. A slight chance of showers and thunderstorms after midnight. A chance of showers with a slight chance of thunderstorms late. Sunday: Northeast winds 25 to 30 knots, diminishing to 20 to 25 knots in the afternoon. Seas 4 to 6 feet, occasionally to 8 feet, building to 6 to 8 feet, occasionally to 10 feet in the afternoon. Wave detail: southeast 6 feet at 5 seconds and north 4 feet at 4 seconds, becoming northeast 7 feet at 6 seconds. A slight chance of showers and thunderstorms in the morning, then a chance of showers in the afternoon. Sunday Night: Northeast winds 20 to 25 knots with gusts up to 30 knots. Seas 5 to 7 feet, occasionally to 9 feet. Wave detail: northeast 7 feet at 6 seconds. Monday: East winds 20 to 25 knots. Seas 5 to 7 feet, occasionally to 9 feet. Wave detail: east 7 feet at 7 seconds. Monday Night: East winds 15 to 20 knots with gusts up to 25 knots. Seas 4 to 6 feet, occasionally to 8 feet. Wave detail: east 6 feet at 7 seconds. Tuesday: East winds 15 to 20 knots with gusts up to 25 knots. Seas 4 to 6 feet, occasionally to 8 feet. Wave detail: east 6 feet at 6 seconds. A slight chance of showers and thunderstorms in the afternoon. Tuesday Night: Southeast winds 15 to 20 knots with gusts up to 25 knots. Seas 5 to 7 feet, occasionally to 9 feet. Wave detail: east 6 feet at 8 seconds. A slight chance of thunderstorms. A slight chance of showers in the evening, then a chance of showers after midnight. Wednesday: Southeast winds 15 to 20 knots. Seas 5 to 6 feet, occasionally to 8 feet. Wave detail: east 6 feet at 8 seconds. A chance of showers with a slight chance of thunderstorms. Wednesday Night: Southeast winds 15 to 20 knots. Seas 5 to 8 feet, occasionally to 10 feet. Wave detail: southeast 8 feet at 9 seconds. A slight chance of showers. Thursday: Southeast winds 15 to 20 knots. Seas 5 to 7 feet, occasionally to 9 feet. Wave detail: southeast 7 feet at 9 seconds. A slight chance of showers. A slight chance of thunderstorms in the afternoon. Thursday Night: Southeast winds 15 to 20 knots. Seas 5 to 6 feet, occasionally to 8 feet. 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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