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Current conditions at
Islip, Long Island Mac Arthur Airport (KISP)
Lat: 40.79°NLon: 73.1°WElev: 98ft.
Mostly Cloudy
66°F
19°C
| Humidity | 63% |
| Wind Speed | SW 9 mph |
| Barometer | 30.01 in (1016.0 mb) |
| Dewpoint | 53°F (12°C) |
| Visibility | 10.00 mi |
| Last update | 1 Apr 9:56 am EDT |
Extended Forecast for
2 Miles NNW Stony Brook NY
Today
High: 70 °F
Chance
Showers then
ShowersTonight

Low: 41 °F
Showers and
Patchy FogThursday

High: 46 °F
Chance Rain
and Patchy
FogThursday Night

Low: 40 °F
Chance Light
Rain and
Areas FogFriday
High: 59 °F
Chance Light
Rain and
Areas Fog
then Mostly
CloudyFriday Night

Low: 51 °F
Mostly Cloudy
Saturday

High: 65 °F
Mostly Sunny
Saturday Night

Low: 48 °F
Chance
ShowersSunday

High: 60 °F
Showers
Likely
Detailed Forecast
Today
A chance of showers, then showers and possibly a thunderstorm after 2pm. High near 70. West wind 8 to 11 mph. Chance of precipitation is 80%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tonight
Showers, mainly before 5am. Patchy fog after 2am. Low around 41. East wind 6 to 14 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
Thursday
A 40 percent chance of rain, mainly before 2pm. Patchy fog before 2pm. Otherwise, cloudy, with a high near 46. East wind around 15 mph.
Thursday Night
A slight chance of rain or drizzle before 8pm, then a chance of drizzle or light rain, mainly after 2am. Areas of fog after 8pm. Otherwise, cloudy, with a low around 40. East wind 7 to 13 mph. Chance of precipitation is 30%.
Friday
A chance of drizzle or light rain, mainly before 8am. Areas of fog before 11am. Otherwise, cloudy, then gradually becoming mostly sunny, with a high near 59. Light and variable wind becoming southwest 5 to 8 mph in the afternoon. Chance of precipitation is 30%.
Friday Night
Mostly cloudy, with a low around 51.
Saturday
Mostly sunny, with a high near 65.
Saturday Night
A 30 percent chance of showers after 8pm. Mostly cloudy, with a low around 48.
Sunday
Showers likely. Mostly cloudy, with a high near 60. Chance of precipitation is 70%.
Sunday Night
A 50 percent chance of showers. Mostly cloudy, with a low around 40.
Monday
Mostly sunny, with a high near 53.
Monday Night
Mostly clear, with a low around 38.
Tuesday
Mostly sunny, with a high near 51.
Additional Forecasts and Information
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ABOUT THIS FORECAST
Point Forecast:
2 Miles NNW Stony Brook NY
40.92°N 73.15°W (Elev. 36 ft)
40.92°N 73.15°W (Elev. 36 ft)
5:58 am EDT Apr 1, 2026
10am EDT Apr 1, 2026-6pm EDT Apr 7, 2026


