Boston/ Weather & Environment

Blue-Sky Tease: Boston Basks in Cool Sun Before Sunday Soaker Rolls In

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Published on September 19, 2026
Blue-Sky Tease: Boston Basks in Cool Sun Before Sunday Soaker Rolls InSource: King of Hearts / Wikimedia Commons

Boston is getting a crisp, mostly sunny Saturday, with temperatures starting in the mid-50s and rising to about 63 degrees. But the easy outdoor window is short: rain will spread into Boston Sunday morning, with widespread rain by afternoon and continuing overnight.

Saturday Stays Bright And Cool

Saturday will remain mostly sunny across the city, with northeast winds and a high near 63. Skies should remain clear tonight until around sunrise as temperatures fall into the 40s, making for a decidedly early-fall evening.

Sunday Brings The Umbrella Test

According to the National Weather Service Boston/Norton office, Sunday will be mostly cloudy, with rain spreading in during the morning and becoming widespread by afternoon, a high near 65 and a 60% chance of precipitation. Rain will continue Sunday night with patchy fog, and another quarter- to half-inch of rain is possible. That is a sharper update from Friday's Hoodline forecast, which had called for a cooler but less certain wet weekend.

Beachgoers Face A Rip Current Risk

A rip current statement remains in effect through 8 p.m. Saturday for east-facing Massachusetts beaches, including Eastern Suffolk County. Anyone heading to the coast should swim near a lifeguard, avoid fighting the current and move parallel to shore if caught in one.

Cooler, Windier Pattern Takes Over

Monday should turn partly sunny after a slight chance of early showers, with a high around 68. Tuesday and Wednesday stay cool, while northeast winds strengthen to 15 to 24 mph Wednesday. A possible coastal low could bring additional rainfall and stronger coastal winds Thursday into Friday, making the second half of the week feel more windbreaker than beach towel.

Boston-Weather & Environment