Long Island Weather — Alerts & Forecast
Official NWS alerts and forecasts for Nassau and Suffolk County. Live observations from MacArthur Airport (KISP).
Current Conditions — KISP / Islip MacArthur Airport
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No active weather alerts for Nassau or Suffolk County.
Nassau County OKX 33,37
Sunny
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Sunny. High near 80, with temperatures falling to around 78 in the afternoon. Northwest wind around 13 mph.
Mostly Clear
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Mostly clear, with a low around 65. North wind around 9 mph.
Sunny
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Sunny, with a high near 78. East wind 3 to 9 mph.
Partly Cloudy
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Partly cloudy. Low around 70, with temperatures rising to around 72 overnight. South wind 8 to 12 mph.
Showers And Thunderstorms
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A chance of rain showers between 8am and 11am, then showers and thunderstorms. Cloudy. High near 79, with temperatures falling to around 77 in the afternoon. South wind 9 to 16 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Showers And Thunderstorms
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Showers and thunderstorms. Cloudy, with a low around 72. Chance of precipitation is 90%. New rainfall amounts between three quarters and one inch possible.
Showers And Thunderstorms Likely
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Showers and thunderstorms likely before 2pm, then a chance of showers and thunderstorms. Partly sunny, with a high near 82. Chance of precipitation is 70%.
Chance Showers And Thunderstorms
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A chance of showers and thunderstorms. Partly cloudy, with a low around 67. Chance of precipitation is 50%.
Slight Chance Rain Showers
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A slight chance of rain showers. Mostly sunny, with a high near 78.
Slight Chance Rain Showers
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A slight chance of rain showers. Mostly clear, with a low around 67.
Suffolk County OKX 55,35
Forecast data unavailable.
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Data: National Weather Service (weather.gov). Nassau grid OKX/33,37 · Suffolk grid OKX/55,35 · Alert zones NYZ077–NYZ080, NYZ179. Observations from KISP (MacArthur Airport). Forecast updated each build: Jul 19, 4:36 PM ET.