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Coastal Waters Forecast for Coastal Waters from Port Fourchon LA to Lower Atchafalaya River LA out 20 nm (GMZ550) (Text-Only)

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: 437 PM CST Fri Feb 13 2026

Dense Fog Advisory Small Craft Advisory Tonight: East winds 5 to 10 knots. Seas 1 foot or less. Wave detail: east 1 foot at 2 seconds and southeast 1 foot at 5 seconds. Patchy fog after midnight with visibility 1 nm or less. Saturday: East winds around 10 knots, becoming southeast 15 to 20 knots with gusts up to 25 knots in the afternoon. Seas 1 to 2 feet, building to 2 to 3 feet in the afternoon. Wave detail: southeast 2 feet at 3 seconds, becoming southeast 3 feet at 4 seconds. Patchy fog in the morning. A slight chance of showers in the afternoon. Visibility 1 nm or less in the morning. Saturday Night: South winds 20 to 25 knots with gusts up to 30 knots. Seas 4 to 6 feet, occasionally to 8 feet. Wave detail: south 6 feet at 6 seconds. A chance of showers with a slight chance of thunderstorms after midnight. Sunday: West winds 20 to 25 knots with gusts up to 30 knots. Seas 4 to 6 feet, occasionally to 8 feet. Wave detail: southwest 6 feet at 7 seconds. A chance of showers and thunderstorms in the morning. Sunday Night: Northwest winds 15 to 20 knots with gusts up to 30 knots, becoming north 10 to 15 knots with gusts up to 20 knots after midnight. Seas 3 to 5 feet, occasionally to 6 feet. Wave detail: southwest 5 feet at 7 seconds and northwest 2 feet at 3 seconds. Monday: North winds 10 to 15 knots with gusts up to 20 knots, diminishing to 5 to 10 knots in the afternoon. Seas 2 to 3 feet. Wave detail: north 2 feet at 3 seconds and southwest 2 feet at 7 seconds. Monday Night: East winds around 5 knots. Seas 1 to 2 feet. Wave detail: southeast 2 feet at 6 seconds. Tuesday: Southeast winds around 5 knots. Seas 1 to 2 feet in the morning, then 1 foot or less. Wave detail: south 1 foot at 6 seconds. Tuesday Night: Southeast winds 5 to 10 knots. Seas 1 foot or less, then 1 to 2 feet after midnight. Wave detail: south 1 foot at 5 seconds, becoming southeast 1 foot at 5 seconds. Wednesday: South winds 5 to 10 knots. Seas 1 to 2 feet. Wave detail: southeast 1 foot at 4 seconds. Wednesday Night: South winds 5 to 10 knots. Seas 1 to 2 feet. 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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