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Warm today with highs near 70 and cooler weather for weekend

Above averages temperatures today with some frost and a chill for Long Island

Rich Hoffman

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Oct 30, 2026, 12:32 PM

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Islip Information

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Islip, New York • Climate data: Islip MacArthur Airport (ISP)
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Happy Friday, Long Island! We're wrapping up the workweek with some beautiful weather. Mostly sunny skies are expected today, and while it will be a little breezy at times, temperatures will climb into the 60s to around 70 degrees. Southwest winds will be around 10 to 20 mph, making for a mild and pleasant afternoon. It's a great day to get outside, enjoy the fall foliage, take a walk or finish up some outdoor work before the cooler weather arrives for the weekend. Overall, we're looking at a really nice weekend across Long Island, with plenty of sunshine, dry conditions and comfortable fall weather.

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Long Island Today forecast
Long Island tonight forecast

Tonight, we'll see mostly clear skies as temperatures begin to drop. Overnight lows will fall into the lower 40s across much of Long Island, with some colder spots dipping into the 30s around the Pine Barrens. You'll definitely notice that autumn chill when you step outside Saturday morning. Happy Halloween! The weather is looking great for all the ghosts, goblins and trick-or-treaters, although it will be cooler than Friday. Expect mostly sunny skies with afternoon highs in the upper 50s. Around noon, temperatures will be near 54 degrees, climbing to around 56 degrees by 4 p.m. By 7 p.m., we'll be down to around 50 degrees under mostly clear skies. The good news is that we're expecting dry weather for trick-or-treating, so no umbrellas will be needed. Just make sure the kids have a warm layer or jacket to wear with their costumes. Drivers should also use extra caution Saturday evening, especially in neighborhoods where children and families will be walking. Slow down, watch for trick-or-treaters crossing streets and be especially careful around parked cars and intersections.

Long Island tomorrow forecast
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Halloween night will be mostly clear and chilly, with overnight temperatures dropping into the upper 30s in many areas. Some of our colder communities could see patchy frost by Sunday morning. And here's your friendly reminder: Daylight saving time ends at 2 a.m. Sunday, Nov. 1! Don't forget to turn your clocks back one hour before heading to bed Saturday night. That means we gain an extra hour of sleep! Sunrise will move back into the 6 a.m. hour, but the trade-off is an earlier sunset, with the sun going down at 4:49 p.m. Sunday. With darkness arriving earlier, please be extra careful when traveling, especially during the late afternoon and evening commute. Watch for pedestrians, bicyclists and wildlife, particularly deer, which are more active around dawn and dusk this time of year. Give yourself a little extra time on the roads, turn on your headlights when needed and be mindful of the changing daylight. The time change is also a perfect reminder to check all the safety alarms in your home. Test your smoke detectors and carbon monoxide detectors, replace batteries when needed, check the expiration dates on your alarms and replace any units that have reached the end of their recommended service life. Make sure everyone in your household knows your family's emergency escape plan, and check that flashlights and emergency supplies are ready for the colder months ahead.

Sunday is looking like another beautiful fall day across Long Island. After a chilly start with temperatures in the 30s and 40s and some patchy frost in our colder communities, we'll enjoy mostly sunny skies and a nice afternoon warm-up. High temperatures will reach the upper 50s and lower 60s. It's going to be a really nice weekend for fall festivals, outdoor sporting events, yard work, taking a walk or just getting outside to enjoy the beautiful fall foliage. If you're heading out early, you'll want a jacket, but by the afternoon, temperatures will feel much more comfortable. Just remember that with sunset now before 5 p.m., you'll want to plan those outdoor activities a little earlier in the day. The entire weekend looks dry, with plenty of sunshine and no significant weather problems expected for outdoor plans.

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And for everyone taking part in marathon weekend, the weather is looking great for running! It will be a cold start Sunday morning, with temperatures generally in the 40s as runners gather at the starting line. You'll definitely want some extra layers while waiting for the race to begin. As the morning progresses, sunshine will help temperatures climb through the 50s, with afternoon highs reaching the upper 50s and lower 60s. Dry conditions should make for a nice day for runners, volunteers and spectators cheering along the course. Whether you're running a marathon, heading out trick-or-treating, enjoying a fall festival, catching a football game or spending time with family and friends, we've got a really nice autumn weekend ahead. Enjoy the sunshine, stay warm during those chilly mornings and evenings, and remember to be careful on the roads as we adjust to the earlier sunsets. Don't forget to turn those clocks back Saturday night and take a few minutes to check those important safety alarms around your home. Have a safe and happy Halloween and a wonderful weekend, Long Island!

Long Island 10 day forecast

CLOCKS 'FALL BACK' THIS WEEKEND

Daylight saving time comes to an end early Sunday morning! We'll turn our clocks back one hour at 2 a.m., giving us an extra hour of sleep. It's also a great time for an important home safety reminder. Test all your smoke alarms and carbon monoxide detectors, replace batteries if needed and check the expiration dates on your detectors. Smoke alarms generally should be replaced every 10 years, while carbon monoxide detectors should be replaced according to the manufacturer's instructions. It's also a good time to check your fire extinguishers, review your family's fire escape plan, make sure your heating system is ready for the colder weather and check your outdoor lighting and timers. With the time change, sunset Sunday will be shortly before 5 p.m., meaning it will get dark much earlier during the evening commute and after-school activities.

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