National Weather Service

News Headlines

Current conditions at

Islip, Long Island Mac Arthur Airport (KISP)

Lat: 40.79°NLon: 73.1°WElev: 98ft.

Fair

60°F

16°C

Humidity	75%
Wind Speed	SW 10 mph
Barometer	29.92 in (1013.0 mb)
Dewpoint	52°F (11°C)
Visibility	10.00 mi
Last update	7 Oct 9:56 pm EDT

More Information:

Local Forecast Office More Local Wx 3 Day History Hourly Weather Forecast

Extended Forecast for

Holtsville NY

Tonight
Low: 59 °F
Mostly Clear
Thursday
High: 72 °F
Sunny
Thursday Night
Low: 52 °F
Mostly Clear
Friday
High: 68 °F
Sunny
Friday Night
Low: 49 °F
Mostly Clear
Saturday
High: 68 °F
Sunny
Saturday Night
Low: 57 °F
Partly Cloudy
Sunday
High: 67 °F
Showers
Sunday Night
Low: 61 °F
Showers

Detailed Forecast

Tonight

Mostly clear, with a low around 59. Southwest wind around 9 mph, with gusts as high as 20 mph.

Thursday

Sunny, with a high near 72. West wind 10 to 13 mph.

Thursday Night

Mostly clear, with a low around 52. Northwest wind 3 to 6 mph.

Friday

Sunny, with a high near 68. West wind 6 to 10 mph.

Friday Night

Mostly clear, with a low around 49. Northwest wind around 5 mph becoming calm in the evening.

Saturday

Sunny, with a high near 68.

Saturday Night

Partly cloudy, with a low around 57.

Sunday

Showers. High near 67. Chance of precipitation is 90%.

Sunday Night

Showers, with thunderstorms also possible after 2am. Low around 61. Chance of precipitation is 80%.

Columbus Day

Showers likely and possibly a thunderstorm before 8am, then a chance of showers between 8am and 2pm. Mostly cloudy, with a high near 70. Chance of precipitation is 60%.

Monday Night

Mostly cloudy, with a low around 58.

Tuesday

A 30 percent chance of showers. Partly sunny, with a high near 66.

Tuesday Night

A 30 percent chance of showers. Mostly cloudy, with a low around 48.

Wednesday

Partly sunny, with a high near 58.