Steamy Week Ahead As Boston Sweats And Inland Heat Alerts Kick In

Boston rolled into Wednesday under partly cloudy skies and comfy low 60s, but the cool start is not sticking around. Southwest breezes are already nudging temperatures toward the low 80s this afternoon, with a sticky, storm-capable air mass building in and a more serious heat surge lining up for inland spots later in the week.

Today and Tonight

Wednesday tops out near 81°F with southwest winds around 8 to 15 mph, and most of the day looks partly sunny and dry. Late tonight, a warm front moves in and opens the door to scattered showers and a few thunderstorms. Lows will only slip to around 65°F, and some patchy fog could form early Thursday, according to the National Weather Service Boston/Norton.

Thursday–Friday Heat Advisories

Heat Advisories are posted for interior Massachusetts and northern Connecticut from noon Thursday through 8 p.m. Friday, setting up a hot and humid stretch away from the coast. Inland highs are expected to climb into the low to mid 90s.

Dewpoints are forecast to jump into the upper 60s to low 70s, which will send heat index values near 100°F on Thursday and above 100°F on Friday in the Connecticut River Valley. Coastal Boston catches a relative break, with temperatures more likely in the mid 80s to low 90s.

Where To Cool Off

For residents without air conditioning, the City of Boston keeps a list of cooling resources and notes that BCYF community centers operate as designated cooling centers during extreme heat. The city also points to public libraries, shopping centers, and pools as good places to cool down. Full guidance is available from the City of Boston.

Weekend Outlook

Humidity should back off over the weekend. Saturday could still feature a lingering shower or two, but Sunday looks drier with highs near 85°F. Forecasters note that uncertainty increases early next week, so anyone planning outdoor events should keep tabs on updated forecasts.

Plan Ahead

For outdoor plans on Thursday or Friday, shifting strenuous activity to morning or evening hours, carrying water, and checking the latest forecasts before heading out will be key. Boaters and beachgoers are urged to monitor coastal conditions and any marine advisories if they plan to be on the water this evening or later in the week.