Boston woke up Sunday, March 15, 2026, to a cool, partly sunny start, with temperatures in the low 30s and an afternoon high near 42°F on tap. Light northeast winds are keeping things on the chilly side for now, but the quiet weather is on borrowed time.
Afternoon Into Tonight
Through the afternoon, expect a mix of sun and clouds with a steady northeast breeze of about 6 to 12 mph. Late tonight, a warm front lifts north and starts to flip the script. Showers will move in, with a slight chance of rain toward 4 to 5 a.m. Monday, then turning into steadier rain and patchy fog. Overnight lows will hover around 38°F.
Heavy Rain And High Wind Watch Monday
Monday, March 16, is when things really ramp up. Rain becomes widespread with patchy fog early, then periods of heavy rain move through with a chance of thunderstorms as temperatures jump into the low 60s. Winds swing around from the southeast at about 18 mph, with gusts up to roughly 33 mph during the day. By Monday night, those winds crank up further, with southerly winds of 20 to 32 mph and gusts that could hit 60 mph.
A High Wind Watch is in effect for eastern Massachusetts and Rhode Island from Monday afternoon through late Monday night, according to the National Weather Service Boston/Norton.
What This Means For Commuters
Heavy rain and embedded thunderstorms could trigger localized flooding in low-lying areas and spots with poor drainage. Strong gusts raise the risk of downed tree limbs and power outages. Travel is likely to be difficult Monday evening into late night, with a good chance of delayed flights at Boston Logan and some very bumpy ferry rides. Drivers of high-profile vehicles should be extra cautious on bridges and other exposed roadways.
How To Prepare
Before the weather turns messy, secure outdoor furniture and trash bins, charge phones and emergency kits, and keep an eye on trees near homes. For more context on the warm spell setting the stage for this system, see our earlier forecast on that recent warm spell, and keep checking official updates as conditions evolve.
