Kennebunkport in August

July and August bring perfect weather and maximum crowds. Ocean temperatures hit 65 degrees — actually swimmable for brave souls. But hotel rates double, and you'll wait 45 minutes for lobster rolls. September is the sweet spot. Crowds thin out after Labor Day, but restaurants stay open and weather remains gorgeous. Foliage starts showing up in late September, adding extra color to coastal drives. June offers mild weather and lower prices, though some seasonal spots don't open until July 4th weekend. October can be magical with fall colors, but pack layers — coastal Maine turns chilly fast.