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Frost and chilly start ahead of a beautiful Sunday on Long Island

Temperatures from the 30s out east to the 40s in Nassau County kick Sunday morning off for Long Island. A beautiful warm-up this afternoon as highs reach the 60s. Nice fall weather follows us into next week.

Julian Seawright

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Oct 25, 2026, 8:00 AM

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Updated

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ALERTS: Frost advisories are in effect for the east end of Suffolk County until 9 a.m. this morning

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Forecast:

Long Island will get a chilly start to Sunday, with a Frost Advisory in effect until 9 a.m. for portions of the island. Temperatures are expected to fall into the mid-30s to low 40s, with clear skies and calm winds allowing patchy frost to develop, particularly across southern Suffolk County.

After the cold start, sunshine will dominate Sunday afternoon, with temperatures climbing into the low to mid-60s. Light winds and dry conditions will make for a beautiful fall day.

Monday stays pleasant, with highs reaching the mid- to upper 60s.

A dry cold front moves through Monday night, bringing cooler air for Tuesday and Wednesday. Afternoon temperatures will drop into the mid- to upper 50s, with chilly mornings and a mix of sunshine and clouds.

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