| 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: 1127 AM CST Sun Jan 11 2026 | |
This Afternoon: North winds 20 to 25 knots, diminishing to 15 to 20 knots late. Seas 3 to 5 feet, occasionally to 6 feet. Wave detail: northeast 4 feet at 3 seconds. Tonight: North winds 20 to 25 knots, becoming northeast 15 to 20 knots after midnight. 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 3 feet at 4 seconds. Monday Night: Northeast winds 10 to 15 knots, diminishing to 5 to 10 knots after midnight. Seas 1 to 2 feet. Wave detail: northeast 2 feet at 3 seconds. Tuesday: Northeast winds 5 to 10 knots, becoming north in the afternoon. Seas 1 to 2 feet in the morning, then 1 foot or less. Wave detail: northeast 1 foot at 2 seconds and east 1 foot at 6 seconds, becoming northeast 1 foot at 2 seconds and southeast 1 foot at 6 seconds. Tuesday Night: Northwest winds around 5 knots, becoming west after midnight. Seas 1 foot or less, then 1 to 2 feet after midnight. Wave detail: southeast 1 foot at 5 seconds, becoming west 1 foot at 3 seconds and southeast 1 foot at 5 seconds. A slight chance of showers in the evening, then a chance of showers after midnight. Wednesday: West winds 10 to 15 knots, increasing to 15 to 20 knots in the afternoon. Seas 2 to 4 feet, occasionally to 5 feet. Wave detail: west 3 feet at 4 seconds. A slight chance of showers in the morning. Wednesday Night: Northwest winds 20 to 25 knots, increasing to 25 to 30 knots after midnight. Seas 3 to 5 feet, occasionally to 6 feet. Wave detail: northwest 4 feet at 4 seconds. Thursday: North winds 25 to 30 knots, diminishing to 15 to 20 knots in the afternoon. Seas 3 to 5 feet, occasionally to 6 feet. Wave detail: north 3 feet at 3 seconds. Thursday Night: North winds 10 to 15 knots, diminishing to around 5 knots after midnight. Seas 1 to 2 feet in the evening, then 1 foot or less. Wave detail: northwest 2 feet at 3 seconds, becoming northwest 1 foot at 2 seconds. | |
| Zone Forecast: Coastal Waters from Port Fourchon LA to Lower Atchafalaya River LA out 20 nm (GMZ550) | |
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