Friday will be a very nice day and will feel more like July than early to mid September. Highs on Friday will generally range from the mid-upper 70's on the coast to lower 80's just inland. This will repeat on Saturday and then there will be a few afternoon showers and possibly a thunderstorm, bringing in some fresh cool Canadian air. Sunday will be a cloudy day with lots of clouds and perhap some scattered showers and drizzle. It will not be a total waste of a day as there may be some breaks of sunshine. Highs Sunday will generally be in the middle 60's coolest in Worcester and at the beaches as water temperatures are currently in the 60-64 degree range.
Monday will be the coolest day of the next seven, but it will be mostly sunny. We will just get an October like chill. Highs will be in the lower 60's everywhere and I would not be at all shocked to see the high in Worcester only make it to 59. Monday night will be the coldest night of the season as well as many of the coldest suburbs in the deepest valleys will drop to around 40. Boston, too, may even fall to between 48-52 degrees. After that temperatures will slowly moderate through the 60's and then we may be in the lower 70's to round out the end of next week.
Florence, that will be a storm for the fish and possibly Bermuda. SNE, we don't have to worry except some wind gusts to 30 mph along the coast Tuesday with some large swells and breakers.
Other than that, enjoy this great September weather. This weekend may be the last time we hit 80 again until next spring, so enjoy.