National Weather Service

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Winter Weather Awareness Week is October 26th - November 1st, 2025

Current conditions at

Islip, Long Island Mac Arthur Airport (KISP)

Lat: 40.79°NLon: 73.1°WElev: 98ft.

Partly Cloudy and Breezy

60°F

16°C

Humidity	33%
Wind Speed	NW 21 G 30 mph
Barometer	29.90 in (1012.4 mb)
Dewpoint	31°F (-1°C)
Visibility	10.00 mi
Last update	1 Nov 2:56 pm EDT

More Information:

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

Extended Forecast for

Sayville NY

Tonight
Low: 40 °F
Partly Cloudy
Sunday
High: 58 °F
Sunny
Sunday Night
Low: 44 °F
Mostly Clear
Monday
High: 61 °F
Mostly Sunny
then Chance
Rain
Monday Night
Low: 46 °F
Chance Rain
Tuesday
High: 61 °F
Sunny
Tuesday Night
Low: 45 °F
Mostly Clear
Wednesday
High: 61 °F
Mostly Sunny
Wednesday Night
Low: 44 °F
Chance Rain

Detailed Forecast

Tonight

Partly cloudy, with a low around 40. Northwest wind 6 to 13 mph, with gusts as high as 24 mph.

Sunday

Sunny, with a high near 58. Northwest wind 5 to 8 mph.

Sunday Night

Mostly clear, with a low around 44. Light southwest wind.

Monday

A 30 percent chance of rain after 2pm. Partly sunny, with a high near 61. Light southwest wind becoming south 6 to 11 mph in the morning.

Monday Night

A 30 percent chance of rain before 2am. Partly cloudy, with a low around 46. Southwest wind around 10 mph becoming northwest after midnight. Winds could gust as high as 21 mph.

Tuesday

Sunny, with a high near 61.

Tuesday Night

Mostly clear, with a low around 45.

Wednesday

Mostly sunny, with a high near 61.

Wednesday Night

A 40 percent chance of rain. Mostly cloudy, with a low around 44.

Thursday

Mostly sunny, with a high near 56.

Thursday Night

Mostly clear, with a low around 40.