Boston is in for a mostly cloudy, warm Sunday with a high near 85°F and only a slim 5% chance of rain through the afternoon — but if you’ve got outdoor plans, get them in today, because a soaking cold front rolls through tonight and turns Monday into a washout.
Today’s Setup
South wind holds at 6 to 12 mph under mostly cloudy skies, with the high near 85°F. It stays quiet until evening — the National Weather Service has shower and thunderstorm chances jumping to 67% overnight as the front approaches, so don’t let a calm afternoon fool you into skipping rain plans for tonight.
Best Window To Be Outside
This afternoon, before roughly 6-8 PM, is your window — whether that’s a walk along the Charles River, a round of golf, or fishing before the front. Keep a Yeti rambler water bottle on hand in the 85° warmth. If you’re teeing off, finish before evening; Monday’s forecast makes it a bad golf day, so reschedule rather than fight it, and save the waterproof golf rain suit for if you get caught out.
Monday’s Washout: Rain And Wind Risk
NWS Boston is watching a strong low-level jet draw 2+ inch precipitable water air into the region, combined with a cold front and the right-rear quadrant of a 120-knot upper jet — a setup forecasters describe as a washout for Monday. Expect widespread half-inch to inch rainfall totals, gusts up to 22 mph, and the chance any single spot picks up a quick 1-inch-plus burst capable of street flooding. The Weather Prediction Center has placed Boston within a broad rainfall risk area stretching from the Mid-Atlantic into the Northeast, so keep an eye out for flash flood potential Sunday night into Monday.
Gameday And Concert Watch
Zac Brown Band plays Fenway Park tonight — the early evening should hold, but pack a light layer since showers likely arrive after 8 PM. Heading to Fenway on August 4 or 5 for the Boston Red Sox vs. Chicago White Sox series? The AFD suggests ridging builds in by Tuesday, backing off the rain — solid tailgating weather is shaping up. Grab a Boston Red Sox jersey or Boston Red Sox fitted cap, and get tickets on SeatGeek or find tickets on StubHub. TD Garden hosts YOASOBI on August 4 (indoors, weather’s a non-issue — pick up a YOASOBI t-shirt), and Gillette Stadium hosts the BTS Arirang tour on August 5. Squeezing in a fishing trip before the front? This deal fits: Score a UPF 50+ Sun Hoodie for Just $5 This Fishing Season.
Dinner Tonight And What’s Next
With today’s dry, warm stretch, it’s a great night to fire up the grill — burgers, steaks, or grilled chicken with corn on the cob. An instant-read meat thermometer and a grill brush and scraper set make cleanup and doneness painless. Need ingredients? You can order groceries on Amazon and have everything for tonight’s dinner delivered to your door.
Looking ahead: Monday is the washout, Tuesday trends drier as high pressure builds in, and NWS Boston expects the pattern to stay unsettled mid-to-late week with periodic shower and storm chances continuing into next weekend. Check the full Boston weather forecast and browse outdoor gear deals before you head out.
