Chart / Forecasts

Lake Pontchartrain

GMZ531 · Coastal Waters Forecast · National Weather Service New Orleans LA · Issued 248 PM CDT Sat Oct 3 2026
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Forecast
This Afternoon
East winds around 10 knots with gusts up to 20 knots. Seas around 2 feet. Showers with thunderstorms likely.
Tonight
East winds 5 to 10 knots. Seas around 2 feet in the evening, then 1 foot or less. Showers with a chance of thunderstorms.
Sunday
Northeast winds 5 to 10 knots. Seas 1 foot or less. Showers with a chance of thunderstorms.
Sunday Night
Northeast winds 5 to 10 knots. Seas 1 foot or less, then 2 to 3 feet after midnight. A chance of thunderstorms in the evening. A chance of showers.
Monday
Northeast winds 10 to 15 knots, diminishing to 5 to 10 knots in the afternoon. Seas 2 to 3 feet. A slight chance of thunderstorms. A slight chance of showers in the morning, then a chance of showers in the afternoon.
Monday Night
Northeast winds 5 to 10 knots, increasing to 10 to 15 knots after midnight. Seas 2 to 3 feet. A slight chance of showers and thunderstorms in the evening.
Tuesday
Northeast winds 10 to 15 knots, diminishing to 5 to 10 knots in the afternoon. Seas 2 to 3 feet. A chance of showers with a slight chance of thunderstorms in the afternoon.
Tuesday Night
Northeast winds 5 to 10 knots, increasing to 10 to 15 knots after midnight. Seas 2 to 3 feet. A slight chance of showers and thunderstorms.
Wednesday
Northeast winds 10 to 15 knots. Seas 2 to 3 feet. A slight chance of showers and thunderstorms in the afternoon.
Wednesday Night
Northeast winds 10 to 15 knots. Seas 2 to 3 feet. 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