Boston woke up under a gray blanket of clouds Monday morning, April 13, 2026, with temperatures lingering in the upper 40s to mid-50s and a steady southwest breeze already in play. The warmup will be quick: temperatures are expected to climb to a high near 74°F, with only a slight chance of a brief shower before midmorning. By later in the day, gusty winds will make biking or hopping a ferry a lot less pleasant.
Afternoon Gusts And Marine Advisories
Southwest winds of 13 to 23 mph are forecast to crank up this afternoon, with gusts pushing into the low- to mid-30s. The National Weather Service Boston/Norton has posted small craft advisories and gale warnings for parts of Boston Harbor and nearby coastal waters through Monday evening. Mariners should expect choppy seas, and ferries could see cancellations or delays. On land, it is a good day to secure patio furniture and use extra caution on exposed streets and bridges.
This Week: Summerlike Warmth Then A Cool-Down
Looking ahead, forecasters are calling for "unseasonable summerlike warmth" Tuesday and Wednesday, with highs mainly in the upper 70s to low 80s inland, according to the National Weather Service Boston/Norton. Scattered afternoon showers and a few thunderstorms are possible both days, with a low risk of isolated severe storms mainly inland and west of I‑91. Coastal neighborhoods may stay much cooler if a backdoor front slips in, setting up a sharp temperature contrast between inland spots and the waterfront.
Plan Ahead
If you are heading outside today, tie down loose items, give yourself extra time if you are biking or waiting for a ferry, and check carrier status before traveling to Logan. For more background on how wind has snarled harbor travel before, see our coverage of harbor gusts rattling the commute.
