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 Fri Sep 18 2026


Tonight: Southeast winds 5 to 10 knots, diminishing to around 5 knots after midnight, then becoming northeast late. Seas 1 foot or less.

Saturday: North winds around 5 knots, becoming southeast in the afternoon. Seas 1 foot or less.

Saturday Night: South winds around 5 knots, becoming southwest after midnight. Seas 1 foot or less.

Sunday: Northwest winds around 5 knots, becoming southeast in the afternoon. Seas 1 foot or less.

Sunday Night: South winds around 5 knots, becoming west after midnight. Seas 1 foot or less.

Monday: North winds around 5 knots, becoming northeast in the afternoon. Seas 1 foot or less. A chance of showers and thunderstorms in the afternoon.

Monday Night: Southeast winds around 5 knots, becoming southwest after midnight. Seas 1 foot or less.

Tuesday: North winds around 5 knots, becoming east in the afternoon. Seas 1 foot or less.

Tuesday Night: Southeast winds around 5 knots, becoming west after midnight. Seas 1 foot or less.

Wednesday: Northeast winds 5 to 10 knots. Seas 1 foot or less. A slight chance of showers and thunderstorms in the afternoon.

Wednesday Night: Northeast winds 5 to 10 knots. Seas 1 foot or less, then around 2 feet after midnight.

winds and seas higher in and near thunderstorms.







Zone Forecast: Lake Pontchartrain (GMZ531)

Visit your local NWS office at: https://www.weather.gov/lix