Boston/ Weather & Environment

Foggy Boston Morning Clears to Sun Before Chilly Weekend and Sunday Soaker

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Published on September 18, 2026
Foggy Boston Morning Clears to Sun Before Chilly Weekend and Sunday SoakerSource: King of Hearts / Wikimedia Commons

Boston is starting Friday with patchy fog and midlevel cloud cover, but clearing skies and temperatures in the 70s are expected before a much cooler weekend settles in.

Friday Turns Sunny After A Foggy Start

Patchy fog is expected before 9 a.m., followed by dry and sunny conditions through the afternoon. Northwest winds will run 8 to 15 knots, with gusts up to 20 to 25 mph in some areas, while temperatures fall to around 53 Friday night under clear skies.

Saturday Brings Fall-Like Temperatures And Beach Hazards

Saturday looks mostly sunny but noticeably cooler, with a high near 64 and an overnight low around 52. The National Weather Service Boston/Norton discussion lists a Rip Statement for east-facing Massachusetts beaches for Saturday because of increased rip-current risk. Swimmers should follow posted warnings and lifeguard guidance.

Sunday Rain Arrives After Noon

Clouds return Sunday, with shower and rain chances increasing Sunday morning into Sunday afternoon and a 60% chance of precipitation. The high should reach about 65 degrees, while Sunday night brings more showers, patchy fog, and a 70% chance of rain.

Showers could linger into Monday, which is expected to reach about 68 degrees. The workweek then turns cooler, with windy conditions Tuesday and a high around 63; Wednesday is expected to be sunny, with increased shower chances Thursday, according to the National Weather Service.

Boston-Weather & Environment