Boston rolled out of bed to a gray, chilly start on Monday, May 11, 2026, with Logan Airport clocking temperatures in the low to mid 50s under a blanket of clouds. Skies are expected to brighten through the afternoon, and the high should land near 59°F with a light northwest breeze around 7 mph. Boaters and ferry riders, however, are still dealing with the leftovers from the weekend weather, with a Small Craft Advisory hanging on through 8 AM EDT in the southern outer waters.
Afternoon And Commute
By midday, most neighborhoods should see the sun fighting its way through, setting up a mostly dry commute and decent conditions for outdoor plans. Farther southeast, including Cape Cod and the Islands, clouds may linger a bit longer, with a stray shower still possible this morning. According to the National Weather Service, northwest winds will keep things cooler than some recent days, with highs topping out in the upper 50s.
Midweek Rain Risk
Umbrella sales might tick up by midweek. Rain chances climb Wednesday afternoon into Thursday as a slow-moving system slides in, bringing a likely stretch of steady rain Wednesday night into Thursday alongside areas of patchy fog. Forecast guidance points to a moderate chance that some neighborhoods could pick up around a half inch or more of rain, so anyone with outdoor plans during that window should plan on getting wet. For background on how marine and wind conditions set the stage earlier this week, see Boston boats rock as advisory hits spring warmup.
Boaters And Outdoor Plans
Mariners are urged to skip nonessential trips in the outer southern waters until seas calm down later this morning. Overnight, seas were running 4 to 6 feet and winds briefly gusted higher, making for a bumpy ride. Inland, most outdoor activities today should be in good shape, but a light jacket will still come in handy, with evening lows dipping into the mid 40s. If you have events lined up from Wednesday night through Thursday, keep a backup rain plan ready and check updated forecasts before heading out.
Outlook
Conditions start to turn the corner by Friday, with highs nudging back toward the upper 50s. The weekend looks milder, with temperatures climbing into the upper 60s to around 70°F, though forecasters have lower confidence pinning down the exact timing of any scattered showers. For now, keep the umbrella nearby for the midweek soaking and stay on top of the latest marine advisories before any boating or ferry trips.
