Boston wakes up on the quiet side of the weather story, with clear skies, mild air near 70°F at Logan Airport, and a genuinely pleasant afternoon ahead before the real drama moves in. Look for a high around 81°F and a light east wind that turns into more of a gentle harbor breeze along the waterfront.
Afternoon: Partly Sunny And Breezy
Through this afternoon, skies stay partly sunny with highs in the low 80s across most neighborhoods. An east wind at roughly 6 to 12 mph will keep it feeling cooler by the harbor, while most of the city remains dry. Outside of a stray shower well inland or near the South Shore, the daylight hours should be fine for outdoor plans.
Late Night Into Tuesday: Heavy Rain Possible
Things ramp up late tonight and especially Monday night into Tuesday, when forecasters say bands of heavy rain could set up and lead to localized flash flooding in parts of the region. According to the National Weather Service, Connecticut is already under a Flood Watch, and narrow, torrential bands may drop several inches of rain in only a few hours. The greatest risk is southwest of the city, but localized downpours could still soak Greater Boston. If you are commuting during that window, plan for standing water on streets, slower travel, and the kind of messy ride that makes you wish you had left ten minutes earlier.
Coastal And Commute Impacts
On the water, boaters should keep a close eye on conditions Monday into Tuesday, as gusty onshore winds and building seas could lead to small-craft advisory conditions along the coastline. On land, heavy bursts of rain may significantly reduce visibility for drivers and MBTA riders, slowing everything down. Give yourself extra time, avoid flooded roadways where you can, and assume that puddle is deeper than it looks.
Looking Ahead
After this soggy stretch, a drier midweek pattern settles in before summer heat makes a comeback late in the week. Highs creep into the mid 80s on Thursday, then push into the upper 80s to near 90°F by Friday. For a look at how the region handled the last blast of steamy weather, check out how Boston handled the holiday heat wave earlier this week.
What To Do
Keep an umbrella within arm's reach and think about delaying nonessential travel Monday night into Tuesday if your schedule allows. Sign up for MBTA T-Alerts or follow local news for up to the minute changes on service and road conditions. If you live in a low-lying or flood-prone area, move vehicles off low streets ahead of the heavier rain and avoid walking through moving water once it arrives.
