No school tomorrow: March 14, 2017 by Beth Melo on March 13, 2017 Above: NWS has updated its forecast. Southborough is now outside of the area of uncertainty for rain/sleet (click to enlarge) We all knew it was coming. The official word came out at just past 5:30 pm today. Southborough (and Northborough) public schools will be closed tomorrow, Tuesday, March 14, 2017. That makes the earliest possible end to the school year June 22nd.