National Weather Service

News Headlines

Hazardous Weather Conditions

Current conditions at

Islip, Long Island Mac Arthur Airport (KISP)

Lat: 40.79°NLon: 73.1°WElev: 98ft.

Light Rain

46°F

8°C

Humidity	83%
Wind Speed	NW 20 G 25 mph
Barometer	29.87 in (1011.4 mb)
Dewpoint	41°F (5°C)
Visibility	8.00 mi
Wind Chill	38°F (3°C)
Last update	19 Apr 2:56 pm EDT

More Information:

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

Extended Forecast for

Islip NY

Frost Advisory April 20, 12:00am until April 20, 08:00am

Freeze Warning April 21, 12:00am until April 21, 09:00am

Click here for hazard details and duration

Frost Advisory

Freeze Warning

This Afternoon
High: 49 °F
Showers
Tonight
Low: 37 °F
Decreasing
Clouds
Monday
High: 52 °F
Chance
Showers
Monday Night
Low: 32 °F
Partly Cloudy
Tuesday
High: 52 °F
Sunny
Tuesday Night
Low: 41 °F
Increasing
Clouds
Wednesday
High: 56 °F
Decreasing
Clouds
Wednesday Night
Low: 44 °F
Partly Cloudy
Thursday
High: 63 °F
Mostly Sunny

Detailed Forecast

This Afternoon

Showers, mainly before 5pm. Steady temperature around 49. Northwest wind around 17 mph. Chance of precipitation is 90%. New precipitation amounts of less than a tenth of an inch possible.

Tonight

Mostly cloudy, then gradually becoming clear, with a low around 37. Northwest wind 5 to 9 mph becoming light west after midnight.

Monday

A 40 percent chance of showers. Cloudy, then gradually becoming mostly sunny, with a high near 52. Southwest wind 5 to 9 mph becoming northwest in the afternoon.

Monday Night

Partly cloudy, with a low around 32. Wind chill values between 25 and 30. North wind around 9 mph.

Tuesday

Sunny, with a high near 52. North wind 5 to 7 mph becoming southwest in the afternoon.

Tuesday Night

Increasing clouds, with a low around 41.

Wednesday

Cloudy, then gradually becoming mostly sunny, with a high near 56.

Wednesday Night

Partly cloudy, with a low around 44.

Thursday

Mostly sunny, with a high near 63.