News12 New York
N12 Originals
Numbers & Links
Local
Crime
Weather
Politics
Mostly Cloudy
60°
Local
Crime
Weather
Politics

Clouds and sunshine with temperatures warming up into the 80s by Friday on Long Island

Dry weather continues before a cold front Friday night will bring some showers

Rich Hoffman

•

Sep 30, 2026, 6:16 AM

•

Updated

Share:

More Stories

LI Shoreline Alerts
🌊 LI Shoreline Alerts Checking...
▼
Islip Information

Islip Information

Islip, New York • Climate data: Islip MacArthur Airport (ISP)
Updating...
🌅
Sunrise
--
Islip
🌇
Sunset
--
Islip
☀️
UV Index Today
--
Loading...
🌙
Moon Phase
--
Tonight
🍃
Air Quality
--
Loading...
🌡️
Average High / Low
-- / --
1991-2020 Normals
ISP Climate
🏆
Record High / Low
-- / --
Loading...
ISP Climate
Loading latest Islip information...

We’re heading into a really nice stretch of weather across Long Island as we close out September and welcome October. We’ll start our Wednesday with some clouds, but sunshine will mix in as we go through the day. Overall, expect a comfortable mixture of sun and clouds with high temperatures generally in the lower 70s. It will be a little cooler toward the East End, where some spots will stay in the upper 60s.

Long Island Today forecast

For tonight, clouds will gradually increase, but we’ll stay dry. Overnight lows will fall into the upper 50s and lower 60s. Thursday is looking good with partly sunny skies and even warmer temperatures. Highs will range from about 72 to 77 degrees. Thursday night will feature some clouds at times with partly cloudy skies and lows dropping back into the 50s.

Long Island tonight forecast
Long Island tomorrow forecast

Friday looks like the warmest day of the stretch. We’ll have mostly sunny skies with a few clouds arriving later in the afternoon. Temperatures will climb well into the 70s, and parts of Nassau County and western Suffolk County could even reach the lower 80s. A cold front will move through Friday night, bringing increasing clouds and the chance for a few showers. Behind the front, temperatures will drop into the 50s.

fri730pm.png
fri930pm.png

The weekend starts off cooler Saturday. There’s a small chance of an isolated shower before about 8 a.m., but most of Saturday should be dry with a mixture of sun and clouds. High temperatures will only reach the upper 60s. Saturday night looks partly cloudy and cool, with overnight lows generally in the 50s.

sat130am.png
sat215pm.png

There is some encouraging news for Sunday. Yesterday, it looked like a storm could have a more direct impact on Long Island, but the latest trend has shifted the system farther away, potentially leaving us with just a glancing blow. For now, we’ll go with partly sunny skies Sunday and only a slight chance of an isolated afternoon shower. High temperatures will remain in the 60s. We’ll continue watching the storm track closely because there is still some uncertainty, and additional shifts are possible as we get closer to the weekend.

sun10am.png
sun5pm.png

More From News12

App StoreGoogle Play Store

info

Newsletter

Send Photos/Videos

Contact

About Us

News Team

News 12 New York

follow us

Twitter

Facebook

Instagram

more resources

Optimum Corporate

Optimum Service

Advertise on News 12

Careers

Content Removal Policy

© 2026 N12N, LLC

Privacy Policy

Terms of Service

Ad Choices