The SST's were always 78F if not 83F peak, saw and measured those every year I used to measure from the late 80's through 2005.
The "good" years you can bake some inlets to 80's easily - EWB, West Fal., and so on.
It's basically a 1000 or 10,000 /year miracle to rip a cat 3-near 4? up into NE? lol