Boston weather turns stormy as cold front advances Wednesday
Boston weather turns unsettled Wednesday as an advancing cold front sparks scattered showers and isolated thunderstorms, mainly in the afternoon and evening. A few storms could produce strong wind gusts, with severe weather already reported in parts of New England. Drier, less humid air follows Thursday through the weekend.
Key Takeaways
- An advancing cold front is reigniting scattered showers and isolated thunderstorms across Greater Boston and New England on Wednesday.
- The greatest storm chance for Boston falls in the afternoon and evening, with strong, damaging wind gusts the main severe threat.
- Humidity should ease after the front, with dew points dropping toward the 50s and a quieter, cooler stretch into the weekend.
- A high surf advisory remains through Thursday evening for south-facing Massachusetts and Rhode Island beaches.
What is the Boston weather forecast for Wednesday?
Wednesday starts mostly cloudy and muggy before the cold front arrives. According to The Boston Globe, scattered showers and thunderstorms should push across New England from late morning through the afternoon.
Greater Boston sees the best chance of showers in the afternoon and evening, with an isolated thunderstorm mixed in. Highs are expected in the low to mid-80s inland and upper 70s along the immediate coast. Southerly winds shift southwest later, with gusts building to about 20 to 30 mph across Boston and coastal southern New England.
WCVB StormTeam 5 also flags limited thunderstorm coverage, with a Wednesday high near 84°F. Not every neighborhood is expected to see a storm, but any that develop may bring strong winds and lightning.
Could any storms turn severe?
Yes. Forecasters say one or two storms could become severe along coastal New England into Rhode Island. The main hazard is strong downdrafts and damaging wind gusts tied to lift from the passing cold front.
NBC Boston has issued a First Alert for isolated afternoon and evening thunderstorms and reported a National Weather Service tornado warning in west central Maine, plus severe thunderstorms in southern New Hampshire and Maine. Rain of about 1 to 1.5 inches fell in spots Tuesday, offering some relief in areas still dealing with drought.
For outdoor routines tracked in our Longevity & Biohacking coverage, the short-term risk is sudden wind and lightning rather than widespread soaking rain.
When does the humidity break, and how does the weekend look?
The front pulls drier air behind it. Dew points start in the upper 60s to low 70s and should fall into the comfortable 50s as the afternoon progresses, though Boston may not feel the full drop until evening.
Once the cold front clears Wednesday evening, Thursday through the weekend looks quieter and less humid. WCVB expects mostly sunny days with highs near 80°F to 82°F over the weekend before shower chances return early next week. NBC Boston notes sea breezes may keep coastal highs in the 70s while inland areas reach the mid-80s.
Swimmers should still respect the high surf advisory through Thursday evening for south-facing beaches on the Cape, Islands, Buzzards Bay, and Rhode Island, where rough surf and dangerous waves remain a hazard.