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Sunny and nice goes to cold Wednesday morning with patchy frost

Below average temperatures today and tomorrow. Temps in the 30s Wednesday morning rebound to the 70s Thursday afternoon.

Rich Hoffman

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Oct 6, 2026, 7:23 AM

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Islip Information

Islip Information

Islip, New York • Climate data: Islip MacArthur Airport (ISP)
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Long Island Today forecast

Grab the jacket or sweatshirt heading out the door this morning. It’s a chilly start across Long Island, with temperatures in the 40s and 50s. Otherwise, we have a beautiful fall day ahead with plenty of sunshine. It will be cooler than average, with highs around 62 degrees — about 6 degrees below the normal high of 68 for this time of year.

Tonight will be clear and cold, with temperatures dropping into the 40s across much of the island. Some of our normally colder locations, especially around the Pine Barrens, could fall into the 30s. We can’t rule out some patchy frost in those colder spots by early Wednesday morning.

Long Island tonight forecast

Wednesday is looking great with plenty of sunshine and dry conditions. Temperatures begin a gradual warming trend, reaching the mid-60s during the afternoon. Wednesday night stays mostly clear and not quite as cold, with overnight lows generally in the 50s.

Long Island tomorrow forecast

The warming trend continues Thursday with lots of sunshine and afternoon temperatures climbing into the upper 60s and lower 70s. Friday is looking just as nice, with another dry and mostly sunny day. High temperatures will generally reach the upper 60s to around 70 degrees.

Right now, most of the weekend is looking good, too. Saturday should remain dry with a mixture of sunshine and clouds, and much of Sunday looks dry before clouds begin increasing later in the day. We’ll watch our next chance for rain heading into Monday, but until then, it’s a nice stretch of fall weather with chilly mornings, comfortable afternoons and plenty of sunshine.

TROPICAL UPDATE - Possible storm development in the next fews - some moisture can hit Long Island -
Look at details on our new Tropical Weather page. Next storm name is Isaias (ees-ah-EE-ahs).

Long Island 10 day forecast

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