| 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: 536 AM CDT Mon Mar 16 2026 | |
Today: North winds 25 to 30 knots with gusts up to 50 knots, diminishing to 20 to 25 knots with gusts up to 35 knots late. Seas 4 to 6 feet, occasionally to 8 feet. Wave detail: northwest 5 feet at 4 seconds and southwest 3 feet at 6 seconds. A chance of showers and thunderstorms early this morning. Tonight: North winds 20 to 25 knots with gusts up to 35 knots. Seas 3 to 5 feet, occasionally to 6 feet. Wave detail: north 4 feet at 4 seconds and west 1 foot at 6 seconds. Tuesday: North winds 15 to 20 knots, becoming northeast 10 to 15 knots in the afternoon. Gusts up to 30 knots. Seas 2 to 4 feet, occasionally to 5 feet, subsiding to 1 to 2 feet in the afternoon. Wave detail: northeast 3 feet at 4 seconds, becoming northeast 2 feet at 3 seconds. Tuesday Night: Northeast winds 5 to 10 knots. Seas 1 to 2 feet. Wave detail: northeast 2 feet at 3 seconds. Wednesday: East winds 5 to 10 knots. Seas 1 foot or less. Wave detail: east 1 foot at 3 seconds. Wednesday Night: East winds 5 to 10 knots. Seas 1 foot or less. Wave detail: east 1 foot at 4 seconds. Thursday: East winds around 5 knots. Seas 1 foot or less. Wave detail: east 1 foot at 5 seconds. Thursday Night: Southwest winds 5 to 10 knots. Seas 1 to 2 feet. Wave detail: southwest 1 foot at 2 seconds and southeast 1 foot at 5 seconds. Friday: West winds 5 to 10 knots. Seas 1 to 2 feet. Wave detail: west 1 foot at 3 seconds and southeast 1 foot at 5 seconds. Friday Night: Southwest winds around 10 knots. Seas 1 to 2 feet. Wave detail: southwest 2 feet at 3 seconds and southeast 2 feet at 6 seconds. 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) | |
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