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Current conditions at

Islip, Long Island Mac Arthur Airport (KISP)

Lat: 40.79°NLon: 73.1°WElev: 98ft.

Overcast

75°F

24°C

Humidity	94%
Wind Speed	Calm
Barometer	29.83 in (1010.1 mb)
Dewpoint	73°F (23°C)
Visibility	9.00 mi
Last update	4 Sep 1:56 am EDT

More Information:

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

Extended Forecast for

Great River NY

Overnight
Low: 73 °F
Showers
Likely
Friday
High: 83 °F
Chance
Showers then
Mostly Sunny
Friday Night
Low: 65 °F
Partly Cloudy
Saturday
High: 78 °F
Sunny
Saturday Night
Low: 60 °F
Isolated
Showers
Sunday
High: 73 °F
Mostly Sunny
Sunday Night
Low: 60 °F
Mostly Clear
Labor Day
High: 75 °F
Sunny
Monday Night
Low: 62 °F
Partly Cloudy

Detailed Forecast

Overnight

Showers likely and possibly a thunderstorm before 5am, then a chance of showers and thunderstorms after 5am. Mostly cloudy, with a steady temperature around 73. West wind around 5 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Friday

A 30 percent chance of showers and thunderstorms before 8am. Mostly cloudy through mid morning, then becoming sunny, with a high near 83. Northwest wind 5 to 8 mph.

Friday Night

Partly cloudy, with a low around 65. North wind 5 to 7 mph.

Saturday

Sunny, with a high near 78. North wind 7 to 9 mph.

Saturday Night

Isolated showers before 2am. Mostly cloudy, with a low around 60. Northeast wind 5 to 8 mph. Chance of precipitation is 20%.

Sunday

Mostly sunny, with a high near 73.

Sunday Night

Mostly clear, with a low around 60.

Labor Day

Sunny, with a high near 75.