Grand Isle, LA Weather Forecast and Current Conditions

Day Sky High / Low Precip Wind Humidity
Thu
Aug 13 		Partly Cloudy
Close Hourly 		88º / 82º 15% SW 12 mph 68%
11am Sunny 87º 2% WSW 8 mph 68%
12pm Sunny 87º 2% SW 8 mph 66%
1pm Mostly Sunny 87º 15% SW 8 mph 65%
2pm Mostly Sunny 87º 15% SSW 9 mph 68%
3pm Mostly Sunny 87º 15% SSW 10 mph 67%
4pm Mostly Sunny 87º 15% SSW 10 mph 66%
5pm Sunny 87º 2% SSW 11 mph 67%
6pm Sunny 87º 4% SSW 11 mph 69%
7pm Sunny 86º 4% SSW 10 mph 71%
8pm Clear 85º 4% SSW 10 mph 74%
9pm Clear 85º 4% SSW 10 mph 75%
10pm Clear 84º 4% SSW 10 mph 75%
11pm Clear 84º 4% SSW 10 mph 75%
Fri
Aug 14 		Mostly Sunny
View Hourly 		87º / 81º 15% SSW 9 mph 71%
12am Mostly Clear 84º 7% SSW 10 mph 75%
1am Mostly Clear 84º 5% SSW 9 mph 76%
2am Mostly Clear 84º 10% SSW 9 mph 77%
3am Mostly Clear 84º 7% SSW 9 mph 77%
4am Mostly Clear 84º 5% SW 7 mph 77%
5am Mostly Clear 83º 5% SW 7 mph 76%
6am Partly Cloudy 83º 5% WSW 6 mph 75%
7am Partly Cloudy 83º 5% WSW 4 mph 77%
8am Partly Cloudy 85º 5% W 4 mph 76%
9am Partly Cloudy 85º 8% WNW 4 mph 76%
10am Partly Cloudy 84º 4% NNW 4 mph 74%
11am Mostly Sunny 85º 4% NE 3 mph 72%
12pm Sunny 86º 4% ESE 3 mph 70%
1pm Mostly Sunny 86º 15% SSE 3 mph 68%
2pm Mostly Sunny 86º 15% SSE 6 mph 68%
3pm Mostly Sunny 87º 15% S 7 mph 67%
4pm Mostly Sunny 87º 15% S 7 mph 67%
5pm Mostly Sunny 87º 15% S 9 mph 68%
6pm Mostly Sunny 87º 15% S 9 mph 67%
7pm Mostly Sunny 86º 15% S 7 mph 70%
8pm Mostly Clear 85º 15% S 6 mph 74%
9pm Partly Cloudy 85º 15% S 6 mph 76%
10pm Mostly Clear 84º 4% SSW 6 mph 77%
11pm Mostly Clear 84º 4% SSW 6 mph 77%
Sat
Aug 15 		Sunny
View Hourly 		88º / 81º 6% ENE 7 mph 72%
12am Mostly Clear 84º 6% SSW 6 mph 77%
1am Mostly Clear 84º 12% SSW 5 mph 77%
2am Partly Cloudy 83º 5% SW 5 mph 79%
3am Partly Cloudy 83º 9% SW 4 mph 77%
4am Partly Cloudy 83º 5% WSW 4 mph 79%
5am Partly Cloudy 83º 5% W 4 mph 79%
6am Partly Cloudy 83º 6% NW 4 mph 79%
7am Mostly Sunny 82º 6% NNW 4 mph 81%
8am Mostly Sunny 84º 5% NNW 5 mph 78%
9am Mostly Sunny 84º 5% NNW 5 mph 78%
10am Mostly Sunny 84º 5% N 5 mph 76%
Sun
Aug 16 		Mostly Sunny 88º / 82º 21% WNW 7 mph 70%
Mon
Aug 17 		Mostly Sunny 89º / 82º 15% W 11 mph 70%
Tue
Aug 18 		Mostly Sunny 90º / 82º 18% W 10 mph 69%
Wed
Aug 19 		Partly Cloudy 89º / 82º 18% W 10 mph 70%
Thu
Aug 20 		Partly Cloudy 89º / 82º 16% W 10 mph 68%

Weather Radar for Grand Isle, LA See Radar

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* Playback displays weather for the past 6 hours.

NOAA Weather Marine Forecast for Grand Isle, LA

Today
High : 88ºF
SSW wind 5 to 10 kt. Sunny. Seas around 1 ft.
Tonight
Low : 86ºF
SSW wind 5 to 10 kt. Mostly clear. Seas around 1 ft.
Friday
High : 88ºF
Variable winds 5 kt or less. Sunny. Seas around 1 ft.
Friday Night
Low : 83ºF
Variable winds 5 kt or less. Mostly clear. Seas around 1 ft.
Saturday
High : 89ºF
Variable winds 5 kt or less. Sunny. Seas 1 ft or less.
Saturday Night
Low : 83ºF
Variable winds 5 kt or less. Mostly clear. Seas 1 ft or less.
Sunday
High : 89ºF
Variable winds 5 kt or less. A slight chance of showers and thunderstorms after 1pm. Seas 1 ft or less.
Sunday Night
Low : 83ºF
Variable winds 5 kt or less. Mostly clear. Seas around 1 ft.
Monday
High : 89ºF
Variable winds 5 kt or less. Sunny. Seas 1 ft or less.

NOAA Buoy Data Near Grand Isle, LA See Map

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    Wind Speed Forecast for Grand Isle, LA

    ThursdayFridaySaturday
    Wind Speed (MPH) 810101094377644
    4pm8pm12am4am8am12pm4pm8pm12am4am8am12pm
    MPH 810101094377644
    DIR WSWSSWSSWSSWSSWWSWNESSSSWSWNNW

    Current Weather Conditions In Grand Isle, LA

    As Of: 14 minutes ago

    • 87ºF
    • 96ºF
    • 8mph
    • 0º (WSW)
    • 8mph
    • Sunny
    • 10mi
    • 30.08"
    • 68%
    • 0ºF

    The weather right now in Grand Isle, LA is Sunny. The current temperature is 87°F, and the expected high and low for today, Thursday, August 13, 2026, are 88° high temperature and 82°F low temperature. The wind is currently blowing at 8 miles per hour, and coming from the West Southwest. The wind is gusting to 8 mph. With the wind and the atmosphere the temperature feels like 96° Fahrenheit. Expected precipitation is 2 percent, with current humidity at 68 percent, and air pressure at 30.08 in. Visibility is 10 nautical miles. There are 2 current weather alert(s).

    Weather Alerts
    Heat Advisory - 10:41am Thu Aug 13 2026

    ...HEAT ADVISORY IN EFFECT FROM 11 AM TO 8 PM CDT FRIDAY... ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 8 PM CDT THIS EVENING...

    WHAT: Today and tomorrow, Heat Index values up to 110 are
    expected.

    WHERE: All of southeast Louisiana and southern Mississippi.

    WHEN: The Heat Advisory today runs until 8 PM CDT this evening.
    Friday's Heat Advisory will be in effect from 11 AM to 8 PM CDT
    tomorrow.

    IMPACTS: Hot temperatures and high humidity may cause heat
    illnesses.

    PRECAUTIONARY / PREPAREDNESS ACTIONS:

    Drink plenty of fluids, stay in an air-conditioned room, stay out of
    the sun, and check up on relatives and neighbors.

    Take extra precautions when outside. Wear lightweight and loose
    fitting clothing. Try to limit strenuous activities to early morning
    or evening. Take action when you see symptoms of heat exhaustion and
    heat stroke.

    &&

    Heat Advisory - 10:41am Thu Aug 13 2026

    ...HEAT ADVISORY IN EFFECT FROM 11 AM TO 8 PM CDT FRIDAY... ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 8 PM CDT THIS EVENING...

    WHAT: Today and tomorrow, Heat Index values up to 110 are
    expected.

    WHERE: All of southeast Louisiana and southern Mississippi.

    WHEN: The Heat Advisory today runs until 8 PM CDT this evening.
    Friday's Heat Advisory will be in effect from 11 AM to 8 PM CDT
    tomorrow.

    IMPACTS: Hot temperatures and high humidity may cause heat
    illnesses.

    PRECAUTIONARY / PREPAREDNESS ACTIONS:

    Drink plenty of fluids, stay in an air-conditioned room, stay out of
    the sun, and check up on relatives and neighbors.

    Take extra precautions when outside. Wear lightweight and loose
    fitting clothing. Try to limit strenuous activities to early morning
    or evening. Take action when you see symptoms of heat exhaustion and
    heat stroke.

    &&