Coastal Jefferson Parish- Including the city of Grand Isle 333 AM CDT Tue Apr 22 2025 .TODAY...Mostly sunny. A slight chance of showers and thunderstorms this morning, then a chance of showers and thunderstorms this afternoon. Highs around 80. Southeast winds 5 to 10 mph. Chance of rain 40 percent. .TONIGHT...Partly cloudy in the evening, then becoming mostly cloudy. Lows in the upper 60s. Southeast winds 5 to 10 mph. .WEDNESDAY...Mostly sunny with a slight chance of thunderstorms. A chance of showers, mainly in the morning. Highs in the upper 70s. Southeast winds 5 to 10 mph. Chance of rain 30 percent. .WEDNESDAY NIGHT...Mostly cloudy. Lows in the upper 60s. Southeast winds 5 to 10 mph. .THURSDAY...Partly sunny. Highs around 80. Southeast winds 5 to 10 mph. .THURSDAY NIGHT THROUGH SATURDAY...Partly cloudy. Lows around 70. Highs in the lower 80s. .SATURDAY NIGHT...Mostly clear in the evening, then becoming partly cloudy. Lows in the upper 60s. .SUNDAY...Mostly sunny. Highs in the lower 80s. .SUNDAY NIGHT AND MONDAY...Mostly clear. Lows in the upper 60s. Highs in the lower 80s.