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Current conditions at
Islip, Long Island Mac Arthur Airport (KISP)
Lat: 40.79°NLon: 73.1°WElev: 98ft.
Mostly Cloudy
81°F
27°C
Humidity | 74% |
Wind Speed | SE 9 mph |
Barometer | 30.08 in (1018.5 mb) |
Dewpoint | 72°F (22°C) |
Visibility | 10.00 mi |
Heat Index | 85°F (29°C) |
Last update | 13 Jul 2:56 pm EDT |
Extended Forecast for
Stony Brook NY
Tonight
Low: 71 °F
Patchy Fog
then Patchy
Drizzle and
Patchy FogMonday
High: 84 °F
Patchy
Drizzle then
Slight Chance
T-stormsMonday Night
Low: 73 °F
Chance
T-stormsTuesday
High: 85 °F
Chance
ShowersTuesday Night
Low: 73 °F
Partly Cloudy
then Slight
Chance
ShowersWednesday
High: 88 °F
Partly Sunny
Wednesday Night
Low: 75 °F
Chance
ShowersThursday
High: 91 °F
Partly Sunny
then Chance
T-stormsThursday Night
Low: 77 °F
Chance
T-storms then
Mostly Cloudy
Detailed Forecast
Tonight
Patchy drizzle after 5am. Patchy fog after 11pm. Otherwise, mostly cloudy, with a low around 71. Southeast wind 5 to 7 mph becoming calm after midnight.
Monday
Patchy drizzle before 8am, then a slight chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 84. South wind 3 to 7 mph. Chance of precipitation is 20%.
Monday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 73. Southwest wind 5 to 7 mph.
Tuesday
A chance of showers and thunderstorms. Mostly cloudy, with a high near 85. Calm wind becoming south around 6 mph in the afternoon. Chance of precipitation is 40%.
Tuesday Night
A 20 percent chance of showers after 2am. Partly cloudy, with a low around 73. Southwest wind 3 to 6 mph.
Wednesday
Partly sunny, with a high near 88.
Wednesday Night
A 30 percent chance of showers before 2am. Mostly cloudy, with a low around 75.
Thursday
A 30 percent chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 91.
Thursday Night
A 30 percent chance of showers and thunderstorms before 8pm. Mostly cloudy, with a low around 77.
Friday
A 30 percent chance of showers after 2pm. Mostly sunny, with a high near 92.
Friday Night
A 30 percent chance of showers. Partly cloudy, with a low around 74.
Saturday
A 30 percent chance of showers. Mostly sunny, with a high near 87.
Saturday Night
A 30 percent chance of showers. Mostly cloudy, with a low around 71.
Sunday
A 30 percent chance of showers. Mostly sunny, with a high near 85.
Additional Forecasts and Information
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ABOUT 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)
2:02 pm EDT Jul 13, 2025
3pm EDT Jul 13, 2025-6pm EDT Jul 20, 2025