Hazardous Weather Conditions
Current conditions at
Islip, Long Island Mac Arthur Airport (KISP)
Lat: 40.79°NLon: 73.1°WElev: 98ft.
Thunderstorm Heavy Rain
76°F
24°C
| Humidity | 77% |
| Wind Speed | N 12 mph |
| Barometer | 29.93 in (1013.5 mb) |
| Dewpoint | 68°F (20°C) |
| Visibility | 5.00 mi |
| Heat Index | 77°F (25°C) |
| Last update | 20 May 6:56 pm EDT |
Extended Forecast for
East Setauket NY
Severe T-storm Watch until May 20, 09:00pm
NOW until 9:00pm Wed
Severe T-storm Watch
Tonight
Low: 57 °F
Severe
Thunderstorms
then Chance
ShowersThursday
High: 64 °F
Showers
LikelyThursday Night
Low: 53 °F
Gradual
ClearingFriday
High: 68 °F
Increasing
CloudsFriday Night
Low: 52 °F
Mostly Cloudy
then Slight
Chance
ShowersSaturday
High: 61 °F
Showers
Saturday Night
Low: 53 °F
Showers
Sunday
High: 69 °F
Showers
Likely
Detailed Forecast
Tonight
Showers and possibly a thunderstorm before 5am, then a chance of showers. Some of the storms could be severe. Low around 57. West wind 5 to 7 mph becoming north after midnight. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Thursday
Showers likely, mainly before 11am. Cloudy, with a high near 64. North wind 7 to 10 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.
Thursday Night
Mostly cloudy during the early evening, then gradual clearing, with a low around 53. Calm wind.
Friday
Increasing clouds, with a high near 68. Northeast wind 9 to 11 mph.
Friday Night
A 20 percent chance of showers after 2am. Mostly cloudy, with a low around 52. Southeast wind 3 to 6 mph.
Saturday
Showers, mainly after 8am. High near 61. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Saturday Night
Showers. Low around 53. Chance of precipitation is 80%.
Sunday
Showers likely, mainly before 2pm. Cloudy, with a high near 69. Chance of precipitation is 70%.
Sunday Night
Showers likely, mainly between 8pm and 2am. Cloudy, with a low around 56. Chance of precipitation is 60%.
Memorial Day
A 40 percent chance of showers before 2pm. Mostly cloudy, with a high near 76.
Monday Night
A 30 percent chance of showers. Mostly cloudy, with a low around 59.
Tuesday
Partly sunny, with a high near 80.
Tuesday Night
Mostly cloudy, with a low around 61.
Wednesday
Mostly sunny, with a high near 83.
Additional Forecasts and Information
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Forecast AreaABOUT THIS FORECAST
Point Forecast:
East Setauket NY
40.94°N 73.11°W (Elev. 52 ft)
40.94°N 73.11°W (Elev. 52 ft)
2:26 pm EDT May 20, 2026
7pm EDT May 20, 2026-6pm EDT May 27, 2026
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