BackBay 61° Current Weather Today 61° Mostly sunny. Patchy fog in the morning. Highs in the mid 70s. Southeast winds 5 to 10 mph. Hourly Detailed Radar Fri 76° 66° Sat 83° 62° Sun 80° 60° Mon 79° 64° Tue 85° 61° Wed 78° --° Local every day in Back Bay, MA Back Bay, MA Back Bay, MA South End Beacon Hill Charlestown Jamaica Plain Somerville Brookline Malden Belmont See more