Current conditions at
Islip, Long Island Mac Arthur Airport (KISP)
Lat: 40.79°NLon: 73.1°WElev: 98ft.
A Few Clouds
32°F
0°C
| Humidity | 50% |
| Wind Speed | N 14 mph |
| Barometer | 30.61 in (1036.5 mb) |
| Dewpoint | 15°F (-9°C) |
| Visibility | 10.00 mi |
| Wind Chill | 22°F (-6°C) |
| Last update | 8 Apr 7:56 am EDT |
Extended Forecast for
Holtsville NY
Today
High: 47 °F
Sunny
Tonight
Low: 32 °F
Clear then
Patchy FrostThursday
High: 51 °F
Sunny
Thursday Night
Low: 37 °F
Mostly Clear
then Patchy
FrostFriday
High: 56 °F
Patchy Frost
then SunnyFriday Night
Low: 45 °F
Mostly Cloudy
Saturday
High: 59 °F
Becoming
SunnySaturday Night
Low: 40 °F
Clear
Sunday
High: 55 °F
Sunny
Detailed Forecast
Today
Sunny, with a high near 47. Wind chill values between 20 and 30 early. North wind 9 to 13 mph becoming southeast in the afternoon.
Tonight
Patchy frost after midnight. Otherwise, mostly clear, with a low around 32. Southeast wind 3 to 7 mph.
Thursday
Sunny, with a high near 51. Southeast wind 5 to 8 mph.
Thursday Night
Patchy frost after 4am. Otherwise, mostly clear, with a low around 37. South wind around 5 mph becoming calm after midnight.
Friday
Patchy frost before 7am. Otherwise, sunny, with a high near 56. Calm wind becoming south 5 to 8 mph in the afternoon.
Friday Night
Mostly cloudy, with a low around 45.
Saturday
Partly sunny, then gradually becoming sunny, with a high near 59.
Saturday Night
Clear, with a low around 40.
Sunday
Sunny, with a high near 55.
Sunday Night
Mostly cloudy, with a low around 45.
Monday
Mostly cloudy, with a high near 63.
Monday Night
Mostly cloudy, with a low around 52.
Tuesday
Partly sunny, with a high near 68.
Additional Forecasts and Information
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Forecast AreaABOUT THIS FORECAST
Point Forecast:
Holtsville NY
40.82°N 73.05°W (Elev. 112 ft)
40.82°N 73.05°W (Elev. 112 ft)
3:28 am EDT Apr 8, 2026
8am EDT Apr 8, 2026-6pm EDT Apr 14, 2026
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