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Hazardous Weather Conditions
Current conditions at
Islip, Long Island Mac Arthur Airport (KISP)
Lat: 40.79°NLon: 73.1°WElev: 98ft.
Overcast
75°F
24°C
| Humidity | 82% |
| Wind Speed | S 12 mph |
| Barometer | 29.66 in (1004.2 mb) |
| Dewpoint | 69°F (21°C) |
| Visibility | 10.00 mi |
| Last update | 28 Jul 7:56 pm EDT |
Extended Forecast for
Stony Brook NY
Flood Watch July 28, 08:37pm until July 29, 08:00pm
NOW until 8:00pm Wed
Flood Watch
Tonight
Low: 70 °F
Showers
Wednesday
High: 77 °F
Showers
Wednesday Night
Low: 68 °F
Showers
LikelyThursday
High: 77 °F
Showers
LikelyThursday Night
Low: 65 °F
Mostly Cloudy
Friday
High: 83 °F
Mostly Sunny
Friday Night
Low: 66 °F
Mostly Clear
Saturday
High: 82 °F
Mostly Sunny
Detailed Forecast
Tonight
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 11pm. Low around 70. Southeast wind 10 to 13 mph, with gusts as high as 23 mph. Chance of precipitation is 80%. New rainfall amounts between 1 and 2 inches possible.
Wednesday
Showers and possibly a thunderstorm before 11am, then a chance of showers and thunderstorms between 11am and 2pm, then showers likely and possibly a thunderstorm after 2pm. High near 77. Southeast wind around 10 mph. Chance of precipitation is 80%. New rainfall amounts between three quarters and one inch possible.
Wednesday Night
A chance of showers and thunderstorms, then showers likely after 11pm. Mostly cloudy, with a low around 68. East wind around 9 mph becoming north after midnight. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Thursday
Showers likely, with thunderstorms also possible after 2pm. Mostly cloudy, with a high near 77. North wind around 10 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Thursday Night
Mostly cloudy, with a low around 65. North wind 7 to 9 mph.
Friday
Mostly sunny, with a high near 83.
Friday Night
Mostly clear, with a low around 66.
Saturday
Mostly sunny, with a high near 82.
Saturday Night
Mostly cloudy, with a low around 67.
Sunday
Partly sunny, with a high near 82.
Sunday Night
A 40 percent chance of showers. Mostly cloudy, with a low around 68.
Monday
A 30 percent chance of showers. Partly sunny, with a high near 82.
Monday Night
Mostly cloudy, with a low around 67.
Tuesday
Mostly sunny, with a high near 83.
Additional Forecasts and Information
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Forecast AreaABOUT THIS FORECAST
Point Forecast:
Stony Brook NY
40.92°N 73.12°W (Elev. 112 ft)
40.92°N 73.12°W (Elev. 112 ft)
2:34 pm EDT Jul 28, 2026
8pm EDT Jul 28, 2026-6pm EDT Aug 4, 2026
Additional Resources
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Hourly Weather Forecast
