Bostonians and much of Massachusetts are enjoying a quintessential summer Saturday, marked by blue skies, warm but comfortable temperatures, and a refreshing sea breeze along the coast. Highs have climbed into the upper 70s and mid-80s inland, while Cape Cod and the Islands remain a touch cooler. A stray inland shower may pop up by late afternoon, but overall, the day has been ideal for outdoor activities, with conditions drawing residents to parks, beaches, and summer festivals.
The break in humidity, however, will be short-lived. According to the National Weather Service in Boston, a surge of heat and moisture is expected to arrive by Sunday, creating a very different atmosphere across the state. Temperatures inland will rise sharply, ranging between the upper 80s and lower 90s, with Boston itself likely reaching close to 90 degrees. While this is not record-breaking heat, the added humidity will push conditions into an uncomfortable zone, particularly in cities such as Worcester, Lowell, and Springfield. Coastal areas will stay slightly cooler, though Cape Cod and the Islands will not escape the sticky air.
The rising heat and moisture will also set the stage for instability, with scattered thunderstorms possible late Sunday afternoon and into the evening. These storms, though hit-or-miss, could deliver bursts of heavy rain, brief gusty winds, and rapid changes in visibility for travelers on major highways or airports. The National Weather Service warns that while not all communities will experience storms, those that do may see short-lived but disruptive weather. Officials advise residents to pace themselves during outdoor activities, stay hydrated, and monitor alerts in case storm activity intensifies.
As the workweek begins, unsettled weather may linger into Monday. Scattered storms are again possible, especially in the afternoon, though conditions should not be as hot as Sunday. Highs will settle back into the mid-80s, still warm but less oppressive with occasional breaks of sun. By Tuesday, drier and more stable air returns, leaving the region mostly sunny and seasonably warm, with highs near 85 degrees. Wednesday brings the most pleasant day of the week, with low humidity, bright sunshine, and highs in the lower 80s—a welcome relief from the fluctuations of the weekend.
The five-day outlook paints a clear picture of transition. Saturday’s sunshine and comfortable air give way to Sunday’s return of heat and humidity, capped by the threat of thunderstorms. Monday continues the unsettled theme before a gradual drying trend takes over Tuesday and Wednesday. For residents planning outdoor activities, the advice is to take advantage of the bookends of this forecast—today’s fair skies and midweek’s dry air—while remaining cautious during the hot, humid, and storm-prone stretch on Sunday and Monday.
Massachusetts is shifting from a postcard summer day into a more volatile weather pattern. With temperatures rising near 90 degrees in Boston and other inland cities on Sunday, paired with climbing humidity, conditions will favor discomfort and scattered thunderstorms. While storms will be spotty, they carry the potential for sudden downpours and gusty winds. Residents and visitors alike should be prepared for both the summer heat and the possibility of sudden weather changes as the weekend closes and the new week begins.
