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Fall 2026 Frost/Freeze Program

Current conditions at

Islip, Long Island Mac Arthur Airport (KISP)

Lat: 40.79° N Lon: 73.1° W Elev: 98 ft.

Fog/Mist

55°F

13°C

Humidity	96%
Wind Speed	NE 13 mph
Barometer	29.70 in (1005.8 mb)
Dewpoint	54°F (12°C)
Visibility	6.00 mi
Wind Chill	51°F (11°C)
Last update	12 Oct 4:56 am EDT

More Information:

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

Detailed forecast for

Northwest Suffolk

Today

Mostly cloudy with a slight chance of showers and thunderstorms this morning, then sunny this afternoon. Highs around 70. North winds 10 to 15 mph. Gusts up to 25 mph this morning. Chance of rain 20 percent.

Tonight

Mostly clear. Lows in the mid 50s. North winds around 5 mph.

Tuesday

Partly sunny. Highs around 70. Southeast winds 5 to 10 mph.

Tuesday Night

Mostly cloudy in the evening, then clearing. Lows in the lower 60s. Southwest winds 10 to 15 mph.

Wednesday

Mostly sunny. Highs in the mid 70s. West winds 5 to 10 mph. Gusts up to 20 mph in the morning.

Wednesday Night

Mostly cloudy in the evening, then becoming partly cloudy. Lows in the upper 50s.

Thursday

Mostly sunny. Highs in the mid 60s.

Thursday Night

Partly cloudy in the evening, then mostly cloudy with showers likely after midnight. Lows in the mid 50s. Chance of rain 60 percent.

Friday

Showers. Highs in the upper 60s. Chance of rain 80 percent.

Friday Night

Mostly cloudy with showers likely in the evening, then partly cloudy with a chance of showers after midnight. Windy with lows in the mid 40s. Chance of rain 70 percent.

Saturday

Mostly sunny and windy, cooler with highs in the mid 50s.

Saturday Night

Partly cloudy in the evening, then becoming mostly clear. Breezy with lows in the upper 30s.

Sunday

Sunny. Highs in the mid 50s.