Weather for Grand Isle, Louisiana
Current Weather
Humidity: 63%
Feels Like: 103.5°F
Wind: SW 5.6 mph
Wind Gusts: 8.3 mph
Precipitation: 0 in
Cloud Cover: 0%
Visibility: 9 mi
UV Index: 4.4
Five Day Weather Forecast
Fri
H: 86°F
L: 81°F
Sat
H: 85°F
L: 81°F
Sun
H: 83°F
L: 79°F
Mon
H: 90°F
L: 80°F
Tue
H: 87°F
L: 83°F
Air Quality
Nitrogen Dioxide: 1.85 μg/m3
Sulphur Dioxide: 0.74 μg/m3
Ozone: 132 μg/m3
Astronomical
Sun Transit: 1:02 PM
Sunset: 7:32 PM
Daylight: 13 hrs mins
Moon Transit: 12:41 AM
Moonset: 7:26 PM
Moon Phase: New
Moon Illumination: 0.0%
Best Times for Fishing or Hunting
Major Periods
12:00 AM - 12:00 AM12:11 AM - 2:41 PM
Minor Periods
6:56 PM - 8:26 PM5:19 AM - 6:49 AM
Action Rating: 4 out of 5
Special Weather Statement issued August 22 at 12:37PM CDT by NWS New Orleans LA
Effective: Fri August 22, 2025, 12:37 PM
Expires: Fri August 22, 2025, 2:00 PM
At 1237 PM CDT, Doppler radar was tracking a cluster of strong thunderstorms over Gretna, or over Harvey. These storms were nearly stationary. HAZARD...Winds in excess of 40 mph. SOURCE...Radar indicated. IMPACT...Gusty winds could knock down tree limbs and blow around unsecured objects. Locations impacted include... New Orleans, Chalmette, Marrero, Harvey, East New Orleans, Timberlane, Belle Chasse, Metairie, Jefferson, Gretna, Westwego, Woodmere, Violet, Terrytown, Meraux, Poydras, Estelle, Arabi, and Lakefront Airport. This includes the following Interstates... Interstate 10 in Louisiana between mile markers 231 and 255. Interstate 510 between mile markers 1 and 3. Interstate 610 between mile markers 1 and 4.
If outdoors, consider seeking shelter inside a building. Torrential rainfall is also occurring with these storms and may lead to localized flooding. Do not drive your vehicle through flooded roadways. Frequent cloud to ground lightning is occurring with these storms. Lightning can strike 10 miles away from a thunderstorm. Seek a safe shelter inside a building or vehicle.
Flood Advisory issued August 22 at 12:32PM CDT until August 22 at 3:30PM CDT by NWS New Orleans LA
Effective: Fri August 22, 2025, 12:32 PM
Expires: Fri August 22, 2025, 3:30 PM
* WHAT...Urban and small stream flooding caused by excessive rainfall is expected. * WHERE...A portion of southeast Louisiana, including the following parishes, Jefferson, Orleans, Plaquemines and St. Bernard. * WHEN...Until 330 PM CDT. * IMPACTS...Minor flooding in low-lying and poor drainage areas. Water over roadways. * ADDITIONAL DETAILS... - At 1229 PM CDT, trained weather spotters reported heavy rain causing urban and small stream flooding in Belle Chasse due to thunderstorms. Between 1 and 3 inches of rain have fallen. - Belle Chasse and the Westbank are the most likely places to experience minor flooding. Additional rainfall amounts up to 2 inches are expected over the area. This additional rain will result in minor flooding. - Some locations that will experience flooding include... New Orleans, Timberlane, Harvey, Chalmette, Belle Chasse, Marrero, Avondale, Gretna, Westwego, Terrytown, Arabi, Woodmere, Meraux, Estelle and Bridge City. - http://www.weather.gov/safety/flood
Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles.
Special Weather Statement issued August 22 at 12:37PM CDT by NWS New Orleans LA
Effective: Fri August 22, 2025, 12:37 PM
Expires: Fri August 22, 2025, 2:00 PM
At 1237 PM CDT, Doppler radar was tracking a cluster of strong thunderstorms over Gretna, or over Harvey. These storms were nearly stationary. HAZARD...Winds in excess of 40 mph. SOURCE...Radar indicated. IMPACT...Gusty winds could knock down tree limbs and blow around unsecured objects. Locations impacted include... New Orleans, Chalmette, Marrero, Harvey, East New Orleans, Timberlane, Belle Chasse, Metairie, Jefferson, Gretna, Westwego, Woodmere, Violet, Terrytown, Meraux, Poydras, Estelle, Arabi, and Lakefront Airport. This includes the following Interstates... Interstate 10 in Louisiana between mile markers 231 and 255. Interstate 510 between mile markers 1 and 3. Interstate 610 between mile markers 1 and 4.
If outdoors, consider seeking shelter inside a building. Torrential rainfall is also occurring with these storms and may lead to localized flooding. Do not drive your vehicle through flooded roadways. Frequent cloud to ground lightning is occurring with these storms. Lightning can strike 10 miles away from a thunderstorm. Seek a safe shelter inside a building or vehicle.
Flood Advisory issued August 22 at 12:32PM CDT until August 22 at 3:30PM CDT by NWS New Orleans LA
Effective: Fri August 22, 2025, 12:32 PM
Expires: Fri August 22, 2025, 3:30 PM
* WHAT...Urban and small stream flooding caused by excessive rainfall is expected. * WHERE...A portion of southeast Louisiana, including the following parishes, Jefferson, Orleans, Plaquemines and St. Bernard. * WHEN...Until 330 PM CDT. * IMPACTS...Minor flooding in low-lying and poor drainage areas. Water over roadways. * ADDITIONAL DETAILS... - At 1229 PM CDT, trained weather spotters reported heavy rain causing urban and small stream flooding in Belle Chasse due to thunderstorms. Between 1 and 3 inches of rain have fallen. - Belle Chasse and the Westbank are the most likely places to experience minor flooding. Additional rainfall amounts up to 2 inches are expected over the area. This additional rain will result in minor flooding. - Some locations that will experience flooding include... New Orleans, Timberlane, Harvey, Chalmette, Belle Chasse, Marrero, Avondale, Gretna, Westwego, Terrytown, Arabi, Woodmere, Meraux, Estelle and Bridge City. - http://www.weather.gov/safety/flood
Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles.
Special Weather Statement issued August 22 at 12:37PM CDT by NWS New Orleans LA
Effective: Fri August 22, 2025, 12:37 PM
Expires: Fri August 22, 2025, 2:00 PM
At 1237 PM CDT, Doppler radar was tracking a cluster of strong thunderstorms over Gretna, or over Harvey. These storms were nearly stationary. HAZARD...Winds in excess of 40 mph. SOURCE...Radar indicated. IMPACT...Gusty winds could knock down tree limbs and blow around unsecured objects. Locations impacted include... New Orleans, Chalmette, Marrero, Harvey, East New Orleans, Timberlane, Belle Chasse, Metairie, Jefferson, Gretna, Westwego, Woodmere, Violet, Terrytown, Meraux, Poydras, Estelle, Arabi, and Lakefront Airport. This includes the following Interstates... Interstate 10 in Louisiana between mile markers 231 and 255. Interstate 510 between mile markers 1 and 3. Interstate 610 between mile markers 1 and 4.
If outdoors, consider seeking shelter inside a building. Torrential rainfall is also occurring with these storms and may lead to localized flooding. Do not drive your vehicle through flooded roadways. Frequent cloud to ground lightning is occurring with these storms. Lightning can strike 10 miles away from a thunderstorm. Seek a safe shelter inside a building or vehicle.
Weather Forecast
Average Temperature: 83.9°F
Average Humidity: 82%
Wind: 9.8 mph
UV Index: 2.3
Air Quality
Nitrogen Dioxide: 2.13 μg/m3
Sulphur Dioxide: 1.08 μg/m3
Ozone: 126.6 μg/m3
Astronomical
Sun Transit: 1:02 PM
Sunset: 7:32 PM
Daylight: 13 hrs mins
Moon Transit: 12:41 AM
Moonset: 7:26 PM
Moon Phase: New
Moon Illumination: 0.0%
Best Times for Fishing or Hunting
Major Periods
12:00 AM - 12:00 AM12:11 AM - 2:41 PM
Minor Periods
6:56 PM - 8:26 PM5:19 AM - 6:49 AM
Action Rating: 4 out of 5
Weather Forecast
Average Temperature: 84°F
Average Humidity: 77%
Wind: 9.8 mph
UV Index: 0.5
Air Quality
Nitrogen Dioxide: 1.95 μg/m3
Sulphur Dioxide: 0.73 μg/m3
Ozone: 134.84 μg/m3
Astronomical
Sun Transit: 1:02 PM
Sunset: 7:31 PM
Daylight: 12 hrs 58 mins
Moon Transit: 1:27 PM
Moonset: 7:57 PM
Moon Phase: New
Moon Illumination: 1.4%
Best Times for Fishing or Hunting
Major Periods
12:35 AM - 3:05 AM12:57 AM - 3:27 PM
Minor Periods
7:27 PM - 8:57 PM6:20 AM - 7:50 AM
Action Rating: 5 out of 5
Weather Forecast
Average Temperature: 81.9°F
Average Humidity: 79%
Wind: 13.4 mph
UV Index: 2.3
Air Quality
Nitrogen Dioxide: 1.88 μg/m3
Sulphur Dioxide: 0.62 μg/m3
Ozone: 135.84 μg/m3
Astronomical
Sun Transit: 1:02 PM
Sunset: 7:30 PM
Daylight: 12 hrs 56 mins
Moon Transit: 2:10 PM
Moonset: 8:25 PM
Moon Phase: New
Moon Illumination: 0.1%
Best Times for Fishing or Hunting
Major Periods
1:19 AM - 3:49 AM1:40 PM - 4:10 PM
Minor Periods
7:55 PM - 9:25 PM7:18 AM - 8:48 AM
Action Rating: 4 out of 5
Weather Forecast
Average Temperature: 84°F
Average Humidity: 73%
Wind: 12.8 mph
UV Index: 2.4
Air Quality
Nitrogen Dioxide: 1.86 μg/m3
Sulphur Dioxide: 0.72 μg/m3
Ozone: 123.44 μg/m3
Astronomical
Sun Transit: 1:01 PM
Sunset: 7:29 PM
Daylight: 12 hrs 55 mins
Moon Transit: 2:51 PM
Moonset: 8:52 PM
Moon Phase: New
Moon Illumination: 1.9%
Best Times for Fishing or Hunting
Major Periods
2:01 AM - 4:31 AM2:21 PM - 4:51 PM
Minor Periods
8:22 PM - 9:52 PM8:14 AM - 9:44 AM
Action Rating: 3 out of 5
Weather Forecast
Average Temperature: 84.9°F
Average Humidity: 65%
Wind: 12.1 mph
UV Index: 0
Air Quality
Nitrogen Dioxide: 1.84 μg/m3
Sulphur Dioxide: 0.71 μg/m3
Ozone: 101.77 μg/m3
Astronomical
Sun Transit: 1:01 PM
Sunset: 7:28 PM
Daylight: 12 hrs 53 mins
Moon Transit: 3:31 PM
Moonset: 9:19 PM
Moon Phase: Waxing Crescent
Moon Illumination: 6.1%
Best Times for Fishing or Hunting
Major Periods
2:41 AM - 5:11 AM3:01 PM - 5:31 PM
Minor Periods
8:49 PM - 10:19 PM9:08 AM - 10:38 AM
Action Rating: 2 out of 5