Chart / Forecasts

Chandeleur Sound

GMZ536 · 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. Waves 2 to 3 feet. Showers with a chance of thunderstorms.
Tonight
Southeast winds around 10 knots. Waves around 2 feet. Showers with a chance of thunderstorms.
Sunday
South winds around 10 knots, becoming west in the afternoon. Waves 1 to 2 feet in the morning, then 1 foot or less. Showers with a chance of thunderstorms.
Sunday Night
North winds 5 to 10 knots, increasing to 10 to 15 knots after midnight. Waves 1 to 2 feet, building to 2 to 3 feet after midnight. A chance of showers. A chance of thunderstorms, mainly in the evening.
Monday
Northeast winds 10 to 15 knots with gusts up to 20 knots. Waves 2 to 4 feet. A chance of showers with a slight chance of thunderstorms.
Monday Night
Northeast winds 10 to 15 knots, increasing to 15 to 20 knots after midnight. Waves 3 to 4 feet. A slight chance of thunderstorms. Showers likely, mainly in the evening.
Tuesday
Northeast winds 15 to 20 knots. Waves 3 to 4 feet. A chance of showers with a slight chance of thunderstorms in the morning, then showers likely with a chance of thunderstorms in the afternoon.
Tuesday Night
Northeast winds 15 to 20 knots. Waves 4 to 5 feet. A chance of showers and thunderstorms.
Wednesday
Northeast winds 20 to 25 knots, increasing to 25 to 30 knots in the afternoon. Waves 4 to 6 feet. A chance of showers and thunderstorms in the morning, then a chance of showers with a slight chance of thunderstorms in the afternoon.
Wednesday Night
Northeast winds 20 to 25 knots. Waves 4 to 5 feet. A slight chance of thunderstorms in the evening. A slight chance of showers. Winds and waves 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