Boston rolled out of bed Tuesday, June 23, 2026, into a warm, soupy air mass, with low clouds, patchy fog and temperatures hovering around 68°F near Logan. Showers and scattered thunderstorms are expected on and off through the afternoon, with a high near 69°F and about an 80% chance of rain. Some heavier downpours could squeeze out a quarter to a half inch of rain, especially along the South Coast and Cape Cod. Light northwest winds of 3–7 mph and thick cloud cover will keep inland and harbor neighborhoods stuck in the upper 60s. Urban and poor-drainage spots should keep an eye out for brief flooding under any heavier cells.
Morning Fog And Heavy Downpours
Patchy fog is expected to hang around into mid-morning, trimming visibility at times, particularly near the harbor and the ferry terminals. Showers will be scattered but can turn locally heavy, and a few rumbles of thunder are possible from the morning into the afternoon. The heaviest rain is most likely across the South Coast and Cape Cod, according to the National Weather Service Boston/Norton.
Commute And Transit
Drivers should plan for slower commutes Tuesday morning, as reduced visibility and brief heavy downpours could slow road and ferry traffic and cause temporary ponding on low-lying streets. MBTA riders are encouraged to check service updates via the MBTA and build in some extra travel time. Riders can also sign up for text and email notifications for specific routes.
Midweek Outlook
Rain is expected to taper off by Tuesday evening, June 23, 2026, around 6 p.m., with drier air moving in for Wednesday, June 24, 2026. Skies should turn sunnier and highs will climb to around 77°F. After that brief break, the pattern turns more unsettled again late in the week, with more chances for showers and thunderstorms Friday into Saturday. Forecasters currently see limited risk of widespread severe weather, but it will not be perfectly quiet either.
Quick Tips
Plan on a rain jacket and keep an umbrella close if you are out and about Tuesday, and avoid driving through standing water on city streets. Give yourself extra time if you are using ferries or traveling around the harbor. Boaters should check the local marine forecast before heading out, and anyone organizing outdoor events later this week should keep an eye on forecast updates as the timing of additional showers becomes clearer.
