Islip, Long Island Mac Arthur Airport Weather Forecast
Local 7-day forecast
Mostly Cloudy
Track current conditions, temperature changes, wind, and the full daily outlook for Islip, Long Island Mac Arthur Airport in one place.
Mostly cloudy, with a low around 52. Northwest wind around 12 mph.
Local Weather Overview
This forecast page for Islip, Long Island Mac Arthur Airport is designed for quick trip planning, giving you a clean read on daytime highs, overnight lows, and changing conditions across the upcoming forecast window. Latest sync: May 15, 2026 4:49 AM EDT.
The active forecast window currently covers May 15 to May 21, 2026 for Islip, Long Island Mac Arthur Airport.
Page Snapshot
- Page focus
- city weather
- Forecast window
- May 15 to May 21, 2026
- Latest sync
- May 15, 2026 4:49 AM EDT
- Forecast office
- OKX
- Source
- NOAA / NWS
Daily Outlook
This Week in Islip, Long Island Mac Arthur Airport
Wednesday looks like the warmest upcoming period in Islip, Long Island Mac Arthur Airport at 69 degrees F.
Overnight is the coolest period ahead with temperatures near 52 degrees F.
The strongest winds are forecast for Tuesday Night at about 15 to 24 mph SW.
Precipitation is mentioned in 3 upcoming forecast periods.
Forecast Details
- Last updated
- May 15, 2026 4:49 AM EDT
- Coverage
- 7 days
- Time zone
- America/New_York
- Forecast office
- OKX
- Radar station
- KOKX
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
Partly sunny, with a high near 61. West wind 8 to 12 mph.
Partly cloudy, with a low around 54. West wind 3 to 9 mph.
Sunny. High near 63, with temperatures falling to around 61 in the afternoon. Southwest wind 7 to 20 mph.
Partly cloudy, with a low around 58. Southwest wind 15 to 23 mph.
Mostly sunny, with a high near 67.
Partly cloudy, with a low around 57.
Sunny, with a high near 63.
Mostly clear, with a low around 58.
Sunny, with a high near 68.
Mostly clear, with a low around 62.
A slight chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 69.
A chance of showers and thunderstorms. Mostly cloudy, with a low around 58. Chance of precipitation is 40%.
A chance of rain showers. Partly sunny, with a high near 66.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Overnight
May 15
|
Mostly Cloudy
|
52°F |
12 mph
NW
|
|
Friday
May 15
|
Partly Sunny
|
61°F |
8 to 12 mph
W
|
|
Friday Night
May 15
|
Partly Cloudy
|
54°F |
3 to 9 mph
W
|
|
Saturday
May 16
|
Sunny
|
63°F |
7 to 20 mph
SW
|
|
Saturday Night
May 16
|
Partly Cloudy
|
58°F |
15 to 23 mph
SW
|
|
Sunday
May 17
|
Mostly Sunny
|
67°F |
14 mph
SW
|
|
Sunday Night
May 17
|
Partly Cloudy
|
57°F |
5 to 12 mph
S
|
|
Monday
May 18
|
Sunny
|
63°F |
9 mph
SE
|
|
Monday Night
May 18
|
Mostly Clear
|
58°F |
9 mph
S
|
|
Tuesday
May 19
|
Sunny
|
68°F |
8 to 23 mph
SW
|
|
Tuesday Night
May 19
|
Mostly Clear
|
62°F |
15 to 24 mph
SW
|
|
Wednesday
May 20
|
Mostly Sunny then Slight Chance Showers And Thunderstorms
|
69°F |
14 to 22 mph
SW
|
|
Wednesday Night
May 20
|
Chance Showers And Thunderstorms
|
58°F |
12 to 22 mph
SW
|
|
Thursday
May 21
|
Chance Rain Showers
|
66°F |
12 mph
NW
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Islip, Long Island Mac Arthur Airport.