Chart / Forecasts

Coastal Waters from Stake Island LA to Southwest Pass of the Mississippi River from 20 to 60 nm

GMZ575 · Coastal Waters Forecast · National Weather Service New Orleans LA · Issued 248 PM CDT Sat Oct 3 2026
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Forecast
This Afternoon
Southeast winds 10 to 15 knots. Seas 4 to 5 feet, occasionally to 6 feet. Wave Detail: Southeast 5 feet at 7 seconds. Showers with thunderstorms likely.
Tonight
South winds 10 to 15 knots. Seas 4 to 5 feet, occasionally to 6 feet. Wave Detail: South 5 feet at 7 seconds. Showers with a chance of thunderstorms.
Sunday
South winds 10 to 15 knots. Seas 4 to 5 feet, occasionally to 6 feet. Wave Detail: South 5 feet at 8 seconds. Showers with a chance of thunderstorms.
Sunday Night
Southwest winds around 5 knots, becoming northwest after midnight. Seas 3 to 4 feet, occasionally to 5 feet. Wave Detail: Southeast 4 feet at 7 seconds. A chance of thunderstorms. A chance of showers in the evening, then showers after midnight.
Monday
North winds 5 to 10 knots. Seas 2 to 3 feet. Wave Detail: Southeast 3 feet at 6 seconds. Showers with a chance of thunderstorms.
Monday Night
Northeast winds 5 to 10 knots. Seas 2 to 3 feet. Wave Detail: North 2 feet at 4 seconds and southeast 2 feet at 6 seconds. Showers likely with a slight chance of thunderstorms.
Tuesday
Northeast winds 5 to 10 knots. Seas 2 to 3 feet. Wave Detail: Northeast 3 feet at 5 seconds and southeast 2 feet at 6 seconds. Showers with a chance of thunderstorms.
Tuesday Night
Northeast winds 10 to 15 knots. Seas 2 to 4 feet, occasionally to 5 feet. Wave Detail: Southeast 4 feet at 5 seconds and northeast 4 feet at 5 seconds. A chance of thunderstorms. Showers.
Wednesday
Northeast winds 15 to 20 knots, increasing to 20 to 25 knots in the afternoon. Seas 3 to 5 feet, occasionally to 6 feet, building to 5 to 7 feet, occasionally to 9 feet in the afternoon. Wave Detail: Northeast 5 feet at 6 seconds, becoming northeast 7 feet at 7 seconds. Showers with a chance of thunderstorms.
Wednesday Night
East winds 20 to 25 knots. Seas 6 to 8 feet, occasionally to 10 feet. Wave Detail: Northeast 8 feet at 8 seconds. A chance of thunderstorms. Showers. Winds and seas higher in and near thunderstorms.
Synopsis
A tightening pressure gradient over the coastal waters will form in response to a developing low pressure system in the western Gulf. This will allow southeast winds to remain elevated near 15 knots with higher gusts today. Very choppy seas of 4 to 6 feet will accompany these winds in the open Gulf waters. The lakes and sounds will see slightly lower winds closer to 10 knots and choppy conditions. Winds will briefly relax to 10 knots or less on Sunday as a front stalls along the coast. This front is expected to then slowly push through the waters on Monday and Tuesday. Winds will turn northeasterly behind the front and increase back to 15 to 20 knots as cooler and drier air advects over the warm waters. Another low will form along the front by Wednesday, and this should increase winds in small craft advisory range of 20 to 25 knots through the end of the week. Seas will also increase to 5 to 7 feet by Wednesday and remain at those levels through the end of the week.
Source: National Weather Service Coastal Waters Forecast (CWF), issued 248 PM CDT Sat Oct 3 2026, valid until Sun, 04 Oct 2026 08:00 UTC. Original text · All zones