Current conditions at
Islip, Long Island Mac Arthur Airport (KISP)
Lat: 40.79°NLon: 73.1°WElev: 98ft.
A Few Clouds
67°F
19°C
| Humidity | 66% |
| Wind Speed | W 9 mph |
| Barometer | 29.94 in (1013.7 mb) |
| Dewpoint | 55°F (13°C) |
| Visibility | 10.00 mi |
| Last update | 5 Oct 10:56 am EDT |
Extended Forecast for
Holtsville NY
Today
High: 71 °F
Mostly Sunny
Tonight
Low: 45 °F
Mostly Clear
Tuesday
High: 64 °F
Sunny
Tuesday Night
Low: 42 °F
Clear
Wednesday
High: 64 °F
Sunny
Wednesday Night
Low: 56 °F
Mostly Clear
Thursday
High: 70 °F
Sunny
Thursday Night
Low: 55 °F
Mostly Clear
Friday
High: 68 °F
Sunny
Detailed Forecast
Today
Mostly sunny, with a high near 71. Northwest wind 15 to 18 mph, with gusts as high as 31 mph.
Tonight
Mostly clear, with a low around 45. Northwest wind 10 to 13 mph, with gusts as high as 26 mph.
Tuesday
Sunny, with a high near 64. Northwest wind 11 to 15 mph.
Tuesday Night
Clear, with a low around 42. Northwest wind around 6 mph becoming calm in the evening.
Wednesday
Sunny, with a high near 64. Light southwest wind increasing to 6 to 11 mph in the morning.
Wednesday Night
Mostly clear, with a low around 56.
Thursday
Sunny, with a high near 70.
Thursday Night
Mostly clear, with a low around 55.
Friday
Sunny, with a high near 68.
Friday Night
Mostly clear, with a low around 55.
Saturday
Mostly sunny, with a high near 66.
Saturday Night
Partly cloudy, with a low around 52.
Sunday
Mostly sunny, with a high near 64.
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)
9:10 am EDT Oct 5, 2026
11am EDT Oct 5, 2026-6pm EDT Oct 11, 2026
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