This is true, looking at September as a whole it seems only the very end of the month may feature some cooler weather. And wow, there are some very warm SSTs off the East Coast , the buoy off of Cape May , NJ. is 80 degrees F.
Also, it looks like the Atlantic hurricane season will be ramping up big time soon, A large hurricane in the center of the Atlantic and moving North over time next week and then another more threatening long track may form and threaten the Southeast in 15 to 20 days . Speculation of couyrse, but things are going to get more active.
This will also possibly change the NW Atlantic SST configuration no doubt as well with implications for thew winter season maybe.