| NWS Forecast for: Coastal Waters from Port Fourchon LA to Lower Atchafalaya River LA out 20 nm (GMZ550) Issued by: National Weather Service New Orleans/Baton Rouge, LA Last Update: 1237 PM CST Fri Jan 9 2026 | |
| This Afternoon: South winds 10 to 15 knots with gusts up to 20 knots. Seas 2 to 4 feet, occasionally to 5 feet. Wave detail: south 4 feet at 7 seconds. A chance of showers. A chance of thunderstorms early, then a slight chance of thunderstorms late. Visibility 1 nm or less. Tonight: South winds 10 to 15 knots with gusts up to 20 knots. Seas 2 to 4 feet, occasionally to 5 feet. Wave detail: south 4 feet at 7 seconds. A chance of showers and thunderstorms. Saturday: Southwest winds around 10 knots, becoming northwest with gusts up to 20 knots in the afternoon. Seas 2 to 4 feet, occasionally to 5 feet. Wave detail: south 4 feet at 6 seconds and northwest 2 feet at 2 seconds. A chance of thunderstorms. Showers likely, mainly in the morning. Visibility 1 nm or less. Saturday Night: North winds 20 to 25 knots, increasing to 25 to 30 knots after midnight. Seas 3 to 5 feet, occasionally to 6 feet. Wave detail: north 5 feet at 5 seconds. A slight chance of showers in the evening. Sunday: North winds 25 to 30 knots, diminishing to 20 to 25 knots in the afternoon. Seas 3 to 5 feet, occasionally to 6 feet. Wave detail: northeast 5 feet at 5 seconds. Sunday Night: Northeast winds 20 to 25 knots with gusts up to 30 knots. Seas 2 to 4 feet, occasionally to 5 feet. Wave detail: northeast 4 feet at 4 seconds. Monday: Northeast winds 15 to 20 knots, diminishing to 10 to 15 knots in the afternoon. Seas 2 to 4 feet, occasionally to 5 feet. Wave detail: northeast 4 feet at 4 seconds. Monday Night: Northeast winds 5 to 10 knots. Seas 1 to 2 feet. Wave detail: northeast 2 feet at 4 seconds. Tuesday: Northeast winds 5 to 10 knots, diminishing to around 5 knots in the afternoon. Seas 1 to 2 feet. Wave detail: northeast 2 feet at 5 seconds. Tuesday Night: West winds around 5 knots, increasing to 5 to 10 knots after midnight. Seas 1 foot or less, then 1 to 2 feet after midnight. Wave detail: southeast 1 foot at 6 seconds, becoming west 1 foot at 3 seconds and southeast 1 foot at 6 seconds. A slight chance of showers in the evening, then a chance of showers after midnight. winds and seas higher in and near thunderstorms. | |
| Zone Forecast: Coastal Waters from Port Fourchon LA to Lower Atchafalaya River LA out 20 nm (GMZ550) | |
Visit your local NWS office at: https://www.weather.gov/lix |