Around the deer island area is always decent this time of year.
As the Chief said, this is the optimal time. When I fish I'm usually in the water and on my first spot around 6. With all the bait in the area, live bait will improve you're chances. IMOFotno,
As for time, check the tides. But, I have been doing my best at first light. I launch before the sun rises and arrive at my first spot just as the sky turns pinkish. .