Weather StoryAlmanac, microseasons, and the day's weather story.

Weather in Grand Isle, Louisiana

Roses open on the Piedmont edge. Day 59 of spring. Read this microseason across nine climate regions →

Grand Isle, LA
Sunday, May 17 at 4:11 AM
77
°
Clear
Feels like
78°
Humidity
78%
Wind
18 mph
Sunrise
6:07 AM
Sunset
7:45 PM
Grand Isle, LA
Hour by hour · 24h
76°
11p
76°
12a
76°
1a
76°
2a
76°
3a
76°
4a
77°
5a
76°
6a
76°
7a
76°
8a
77°
9a
77°
10a
77°
11a
77°
12p
77°
1p
77°
2p
78°
3p
78°
4p
78°
5p
77°
6p
78°
7p
77°
8p
78°
9p
78°
10p
L 76°H 78°
Grand Isle, LA
7-day forecast
  1. Today
    May 16
    Overcast
    —
    78°77°
  2. Sunday
    May 17
    Overcast
    —
    78°77°
  3. Monday
    May 18
    Overcast
    —
    80°77°
  4. Tuesday
    May 19
    Drizzle
    —
    85°76°
  5. Wednesday
    May 20
    Light Drizzle
    —
    86°75°
  6. Thursday
    May 21
    Overcast
    16%
    86°74°
  7. Friday
    May 22
    Overcast
    23%
    86°75°
Grand Isle, LA
Next 24 hours · Mild now
74°77°81°12a6a12p6pnow 76°high 78°low 76°
Grand Isle, LA
Anemometer · 24h winds · from true
NESW
From · True
SE
128° · backing 11°
Direction
SE
128°
Sustained
18
mph
Gust
20
mph
Peak 24h
22
avg 14
Beaufort · 4 · MOD BRZ
0
CALM
<1
1
LIGHT AIR
1–3
2
LIGHT BRZ
4–7
3
GENTLE BRZ
8–12
4
MOD BRZ
13–18
5
FRESH BRZ
19–24
6
STRONG BRZ
25–31
7
NEAR GALE
32–38
24h · sust vs gust · mph
avg 14 · pk 22 @ 3:00a
−24h−18h−12h−6hnow
A fresh breeze drives the se-bound air across the harbor.
Grand Isle, LA
Barometer · 24h pressure · mb
STORMRAINCHANGEFAIRDRY9901000101010201030
Pressure · mb
1016.4
+0.1 mb in 3h · falling · 30.01 inHg
Now
1016.4
mb
3h
+0.1
mb
12h
-0.7
mb
24h
+0.4
mb
Regime · FAIR
STORM
RAIN
CHANGE
FAIR
DRY
24h · Pressure · mb
range 1014–1019
−24h−18h−12h−6hnow
Fair, steady air — a quiet anticyclone holds the sky.
Grand Isle, LA
Air quality
66
AQI
Moderate
PM 2.5
10.7 μg/m³
PM 10
15.8 μg/m³
NO₂
0.7 μg/m³
Ozone
113.0 μg/m³
UV Index
0.0 Low
Grand Isle, LA
Almanac · Sunday, May 17
When the dew is on the grass, rain will never come to pass.
Civil dawn
10:43 AM
Sunrise
6:07 AM
Daylight
13h 38m
Sunset
7:45 PM
Civil dusk
1:12 AM
Planting note
Direct sow okra, melons, and southern peas. Thin carrot rows.
Grand Isle, LA
The moon
New Moon
0% illuminated
Moonrise
11:25 AM
Moonset
1:06 AM
In sign
♊︎ Gemini
Grand Isle, LA
Microseason · 28 of 72
May 16–20

Roses open on the Piedmont edge

insect
Jan 137% of the yearDec 31

Read this microseason across nine climate regions →

Grand Isle at a glance

  • Today vs. normal: 5°F below the seasonal normal for this latitude
  • Last frost: February 10 (climatological average for this latitude)
  • Microseason: 28 of 72, May 16–20
  • Planting window: Direct sow okra, melons, and southern peas. Thin carrot rows.

Right now in the garden

Peak growing season

As of May 17, the growing season is at its peak — frost is months away. Continue succession-planting beans and summer squash. Start fall brassicas (broccoli, cabbage, kale) from seed indoors for transplanting in late summer.

All cities in Louisiana →

ZIP codes in Grand Isle

Climate normals from the Open-Meteo Climate API. Köppen approximation from NOAA NCEI U.S. Climate Regions. See methodology for data sources, editorial rules, and corrections. Maintainer: Brian Tighe.