Current conditions at
Islip, Long Island Mac Arthur Airport (KISP)
Lat: 40.79°NLon: 73.1°WElev: 98ft.
Mostly Cloudy
75°F
24°C
| Humidity | 94% |
| Wind Speed | SW 5 mph |
| Barometer | 29.89 in (1011.9 mb) |
| Dewpoint | 73°F (23°C) |
| Visibility | 10.00 mi |
| Last update | 3 Sep 10:56 pm EDT |
Extended Forecast for
Stony Brook NY
Tonight
Low: 70 °F
Slight Chance
T-stormsFriday
High: 83 °F
Partly Sunny
then Slight
Chance
T-stormsFriday Night
Low: 66 °F
Partly Cloudy
Saturday
High: 79 °F
Mostly Sunny
Saturday Night
Low: 63 °F
Chance
ShowersSunday
High: 73 °F
Mostly Sunny
Sunday Night
Low: 60 °F
Mostly Clear
Labor Day
High: 76 °F
Sunny
Monday Night
Low: 62 °F
Mostly Clear
Detailed Forecast
Tonight
A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 70. West wind around 5 mph.
Friday
A 20 percent chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 83. Northwest wind 3 to 6 mph.
Friday Night
Partly cloudy, with a low around 66. Light northwest wind becoming north 5 to 9 mph after midnight.
Saturday
Mostly sunny, with a high near 79. North wind 7 to 9 mph.
Saturday Night
A 30 percent chance of showers before 2am. Mostly cloudy, with a low around 63. Northeast wind around 9 mph.
Sunday
Mostly sunny, with a high near 73.
Sunday Night
Mostly clear, with a low around 60.
Labor Day
Sunny, with a high near 76.
Monday Night
Mostly clear, with a low around 62.
Tuesday
Sunny, with a high near 79.
Tuesday Night
Partly cloudy, with a low around 63.
Wednesday
Partly sunny, with a high near 77.
Wednesday Night
Mostly cloudy, with a low around 67.
Thursday
Partly sunny, with a high near 81.
Additional Forecasts and Information
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Forecast AreaABOUT THIS FORECAST
Point Forecast:
Stony Brook NY
40.92°N 73.15°W (Elev. 36 ft)
40.92°N 73.15°W (Elev. 36 ft)
2:25 pm EDT Sep 3, 2026
11pm EDT Sep 3, 2026-6pm EDT Sep 10, 2026
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