Coastal Jefferson Parish- Including the city of Grand Isle 321 AM CDT Thu Mar 28 2024 .TODAY...Sunny. Highs in the lower 70s. North winds 10 to 15 mph. .TONIGHT...Clear. Lows in the lower 50s. North winds 5 to 10 mph, becoming northeast after midnight. .FRIDAY...Sunny. Highs in the lower 70s. Southeast winds 5 to 10 mph. .FRIDAY NIGHT...Mostly clear in the evening, then becoming mostly cloudy. Lows in the upper 50s. South winds 5 to 10 mph. .SATURDAY...Partly sunny. Highs in the mid 70s. South winds 5 to 10 mph. .SATURDAY NIGHT...Partly cloudy. Lows in the mid 60s. .SUNDAY THROUGH MONDAY NIGHT...Mostly cloudy. Highs in the upper 70s. Lows in the upper 60s. .TUESDAY AND TUESDAY NIGHT...Mostly cloudy with a slight chance of showers and thunderstorms. Highs in the upper 70s. Lows in the upper 50s. Chance of rain 20 percent. .WEDNESDAY...Partly sunny. Highs in the lower 70s. $$