I will be on the Victory. I was hoping to get some sun and hang out pool-side even though it is the 2nd week in Sept. Guess you just never know.
Normal daytime temperatures in Bostin are in the upper 70's to lower 80's that time of year, but either significantly warmer (lower 90's) or significantly cooler (upper 60's) weather is possible. The weather probably will be a few degrees cooler when you get further north. It might be a bit cool for swimming, but probably warm enough for sunbathing.