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Slow Moving Cold Front Moves into the Central U.S.

A slow moving cold front continues to move eastward across the U.S.. Behind the cold front is unseasonably cold weather and high elevation snows. Along the front, an area of heavy rain with the potential for flash flooding will extend from eastern New Mexico to portions of Minnesota. Post-tropical Jose will continue to meander offshore bringing high surf and rip currents to much of the east coast. Read More >

Current conditions at

Islip, Long Island Mac Arthur Airport (KISP)

Lat: 40.79°NLon: 73.1°WElev: 98ft.

Fair

69°F

21°C

Humidity 68%
Wind Speed N 15 mph
Barometer 29.95 in (1014.0 mb)
Dewpoint 58°F (14°C)
Visibility 10.00 mi
Last update 23 Sep 1:56 am EDT
Extended Forecast for

Holtsville NY

  • Overnight

    Overnight: Mostly cloudy, with a low around 64. North wind around 14 mph, with gusts as high as 24 mph.

    Mostly Cloudy

    Low: 64 °F

  • Saturday

    Saturday: Mostly sunny, with a high near 82. North wind around 10 mph, with gusts as high as 21 mph.

    Mostly Sunny

    High: 82 °F

  • Saturday
    Night

    Saturday Night: Clear, with a low around 65. Northeast wind around 5 mph becoming calm  in the evening.

    Clear

    Low: 65 °F

  • Sunday

    Sunday: Sunny, with a high near 86. North wind around 6 mph becoming light and variable  in the afternoon.

    Sunny

    High: 86 °F

  • Sunday
    Night

    Sunday Night: Mostly clear, with a low around 67. Southwest wind around 5 mph becoming light and variable.

    Mostly Clear

    Low: 67 °F

  • Monday

    Monday: Sunny, with a high near 82.

    Sunny

    High: 82 °F

  • Monday
    Night

    Monday Night: Partly cloudy, with a low around 64.

    Partly Cloudy

    Low: 64 °F

  • Tuesday

    Tuesday: Partly sunny, with a high near 79.

    Partly Sunny

    High: 79 °F

  • Tuesday
    Night

    Tuesday Night: Mostly cloudy, with a low around 64.

    Mostly Cloudy

    Low: 64 °F

Detailed Forecast

Overnight
Mostly cloudy, with a low around 64. North wind around 14 mph, with gusts as high as 24 mph.
Saturday
Mostly sunny, with a high near 82. North wind around 10 mph, with gusts as high as 21 mph.
Saturday Night
Clear, with a low around 65. Northeast wind around 5 mph becoming calm in the evening.
Sunday
Sunny, with a high near 86. North wind around 6 mph becoming light and variable in the afternoon.
Sunday Night
Mostly clear, with a low around 67. Southwest wind around 5 mph becoming light and variable.
Monday
Sunny, with a high near 82.
Monday Night
Partly cloudy, with a low around 64.
Tuesday
Partly sunny, with a high near 79.
Tuesday Night
Mostly cloudy, with a low around 64.
Wednesday
Partly sunny, with a high near 79.
Wednesday Night
Mostly cloudy, with a low around 63.
Thursday
Partly sunny, with a high near 78.
Thursday Night
Partly cloudy, with a low around 60.
Friday
Mostly sunny, with a high near 73.
Click Map For Forecast
Point Forecast:
Holtsville NY
 40.82°N 73.05°W (Elev. 112 ft)
2:07 am EDT Sep 23, 2017
2am EDT Sep 23, 2017-6pm EDT Sep 29, 2017
 
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Additional Resources

Radar & Satellite Image

Northeast Radar Mosaic Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database