Current conditions at

Islip, Long Island Mac Arthur Airport (KISP)

Lat: 40.79°NLon: 73.1°WElev: 98ft.

Fair

56°F

13°C

Humidity 81%
Wind Speed SW 13 mph
Barometer 29.91 in (1012.7 mb)
Dewpoint 50°F (10°C)
Visibility 10.00 mi
Last update 1 Apr 4:56 am EDT
Extended Forecast for

Islip Terrace NY

  • Overnight

    Overnight: A 50 percent chance of showers.  Mostly cloudy, with a low around 53. Southwest wind around 13 mph.

    Low: 53 °F

    Chance
    Showers

  • Wednesday

    Wednesday: Showers likely, then showers and possibly a thunderstorm after 5pm.  High near 69. Southwest wind 9 to 11 mph.  Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 69 °F

    Chance
    Showers then
    Showers

  • Wednesday Night

    Wednesday Night: Showers and possibly a thunderstorm before 11pm, then showers likely.  Patchy fog after 2am. Low around 40. Light northeast wind increasing to 6 to 11 mph in the evening.  Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 40 °F

    Showers and
    Patchy Fog

  • Thursday

    Thursday: A 40 percent chance of rain, mainly before 2pm.  Patchy fog before 2pm.  Otherwise, cloudy, with a high near 46. East wind around 15 mph.

    High: 46 °F

    Chance Rain
    and Patchy
    Fog

  • Thursday Night

    Thursday Night: A slight chance of rain or drizzle before 8pm, then a chance of drizzle or light rain, mainly after 2am.  Areas of fog after 8pm.  Otherwise, cloudy, with a low around 39. East wind 6 to 10 mph.  Chance of precipitation is 30%.

    Low: 39 °F

    Chance Light
    Rain and
    Areas Fog

  • Friday

    Friday: A chance of drizzle or light rain before 8am.  Areas of fog before 11am.  Otherwise, mostly cloudy, with a high near 57. Chance of precipitation is 30%.

    High: 57 °F

    Chance Light
    Rain and
    Areas Fog
    then Mostly
    Cloudy

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 49.

    Low: 49 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 64.

    High: 64 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: A 30 percent chance of showers after 8pm.  Mostly cloudy, with a low around 46.

    Low: 46 °F

    Chance
    Showers

Detailed Forecast

Overnight
A 50 percent chance of showers. Mostly cloudy, with a low around 53. Southwest wind around 13 mph.
Wednesday
Showers likely, then showers and possibly a thunderstorm after 5pm. High near 69. Southwest wind 9 to 11 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Wednesday Night
Showers and possibly a thunderstorm before 11pm, then showers likely. Patchy fog after 2am. Low around 40. Light northeast wind increasing to 6 to 11 mph in the evening. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
Thursday
A 40 percent chance of rain, mainly before 2pm. Patchy fog before 2pm. Otherwise, cloudy, with a high near 46. East wind around 15 mph.
Thursday Night
A slight chance of rain or drizzle before 8pm, then a chance of drizzle or light rain, mainly after 2am. Areas of fog after 8pm. Otherwise, cloudy, with a low around 39. East wind 6 to 10 mph. Chance of precipitation is 30%.
Friday
A chance of drizzle or light rain before 8am. Areas of fog before 11am. Otherwise, mostly cloudy, with a high near 57. Chance of precipitation is 30%.
Friday Night
Mostly cloudy, with a low around 49.
Saturday
Mostly sunny, with a high near 64.
Saturday Night
A 30 percent chance of showers after 8pm. Mostly cloudy, with a low around 46.
Sunday
Showers likely. Mostly cloudy, with a high near 58. Chance of precipitation is 70%.
Sunday Night
A 50 percent chance of showers. Mostly cloudy, with a low around 39.
Monday
Mostly sunny, with a high near 52.
Monday Night
Mostly clear, with a low around 37.
Tuesday
Mostly sunny, with a high near 50.
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ABOUT THIS FORECAST

 
Point Forecast:
Islip Terrace NY
 40.75°N 73.18°W (Elev. 30 ft)
2:38 am EDT Apr 1, 2026
5am EDT Apr 1, 2026-6pm EDT Apr 7, 2026
 
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Additional Resources

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