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Cold mornings and a nice afternoon heading into the weekend for Long Island

Temperatures will be a few degrees below average for the weekend. Dry conditions and less wind into next week.

Rich Hoffman

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Oct 23, 2026, 7:32 AM

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Islip Information

Islip Information

Islip, New York • Climate data: Islip MacArthur Airport (ISP)
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We're heading into a beautiful fall weekend across Long Island, with plenty of sunshine, dry conditions and some great weather for outdoor activities. First, for today, lots of sunshine is on the way, but you'll definitely notice a fall chill in the air. Afternoon temperatures will only climb into the 50s, with highs ranging from 53 to 58 degrees. Despite the cooler temperatures, it's shaping up to be a beautiful October day. With sunset now right around 6 p.m., temperatures will drop quickly this evening. Tonight, mostly clear skies and lighter winds will allow temperatures to fall into the 30s across much of Suffolk County, with lower 40s in western Nassau County. Areas of frost are possible, especially in the colder communities of Suffolk County, so you'll want to protect any sensitive plants left outdoors.

Long Island Today forecast
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Long Island tonight forecast
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Saturday morning will bring a chilly start for athletes participating in the Northwell Ironman 70.3 at Jones Beach. Temperatures will begin in the 40s, with perhaps a few passing clouds early in the morning. The good news is that conditions will remain dry, with generally light winds under 15 mph. Sunshine will become more widespread during the afternoon, with temperatures climbing into the 50s. Overall, it's looking like favorable weather for the race, with dry conditions and lighter winds certainly welcome news for participants and spectators. Just remember to dress warmly if you're heading out early to watch or cheer on the athletes, as it will feel quite chilly before temperatures begin to warm up.

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GREAT WEEKEND FOR FALL ACTIVITIES!

For the rest of Long Island, Saturday is shaping up to be a beautiful fall day, with mostly sunny skies and afternoon temperatures in the 50s to around 60 degrees. It's looking like a terrific weekend for outdoor sporting events, football and soccer games, fall festivals, pumpkin picking, apple picking and other outdoor activities. Whether you're visiting a local farm, heading to a festival or spending time outside with family and friends, Mother Nature looks ready to cooperate. You'll probably want a light sweater or jacket, especially during the morning and evening hours, but the combination of sunshine, lighter winds and dry conditions should make for a very enjoyable October weekend. Just remember that with sunset around 6 p.m., temperatures will cool off quickly once the sun goes down.

Saturday night will turn chilly once again under mostly clear skies, with temperatures dropping into the 30s and lower 40s. Some patchy frost will be possible, especially across the colder areas of Suffolk County. Sunday brings another beautiful day, with mostly sunny skies and temperatures warming into the lower 60s. Sunday will be the milder of the two weekend days, making it an especially nice afternoon for fall festivals, outdoor sporting events and family activities. You may still need a light jacket or sweater early in the morning or during the evening, but afternoon conditions should feel quite comfortable in the sunshine. Best of all, we're keeping the entire weekend dry, so there should be no weather-related interruptions to your outdoor plans.

Looking ahead to the start of next week, our stretch of dry and pleasant fall weather continues into Monday, with afternoon temperatures remaining in the 60s. So if you've been waiting for a beautiful October weekend to get outside, this is it! From the Northwell Ironman 70.3 at Jones Beach to local sporting events, fall festivals, pumpkin patches and family outings, the weather is looking fantastic across Long Island. Just remember to dress in layers for those chilly mornings and evenings, and keep a light sweater or jacket handy. The bottom line: Plenty of sunshine, dry weather, lighter winds and comfortable afternoons will make this a terrific fall weekend across Long Island. Get outside and enjoy it!

Fall colors are starting to pop a bit more, too. If you get any nice foliage photos, send them our way on social media if you can!

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Long Island 10 day forecast

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