Coastal Waters Forecast for Lake Pontchartrain (GMZ531) (Text-Only)
NWS Forecast for: Lake Pontchartrain (GMZ531)
Issued by: National Weather Service New Orleans/Baton Rouge, LA
Last Update: 537 PM CDT Sun Sep 6 2026


Tonight: Southwest winds 5 to 10 knots, becoming west late. Seas 1 foot or less. A slight chance of showers and thunderstorms early this evening.

Monday: Northwest winds 5 to 10 knots, becoming southwest in the afternoon. Seas 1 foot or less. A chance of showers and thunderstorms in the afternoon.

Monday Night: Southwest winds around 5 knots, becoming north after midnight. Seas 1 foot or less. A chance of showers and thunderstorms in the evening.

Tuesday: East winds 5 to 10 knots. Seas 1 foot or less, then around 2 feet in the afternoon. A chance of thunderstorms. A chance of showers in the morning, then showers likely in the afternoon.

Tuesday Night: East winds 5 to 10 knots. Seas 1 foot or less. A slight chance of thunderstorms in the evening. A slight chance of showers.

Wednesday: East winds around 5 knots. Seas 1 foot or less. A chance of showers and thunderstorms in the morning, then showers and thunderstorms likely in the afternoon.

Wednesday Night: South winds around 5 knots. Seas 1 foot or less. A slight chance of showers and thunderstorms in the evening.

Thursday: West winds around 5 knots, becoming south in the afternoon. Seas 1 foot or less. A chance of showers with a slight chance of thunderstorms in the morning, then showers likely with a chance of thunderstorms in the afternoon.

Thursday Night: Southwest winds around 5 knots. Seas 1 foot or less. A slight chance of showers and thunderstorms in the evening.

Friday: Southwest winds around 5 knots. Seas 1 foot or less. A slight chance of showers and thunderstorms in the morning, then a chance of showers and thunderstorms in the afternoon.

Friday Night: Southwest winds around 5 knots. Seas 1 foot or less. A slight chance of showers and thunderstorms in the evening.

winds and seas higher in and near thunderstorms.







Zone Forecast: Lake Pontchartrain (GMZ531)

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