There's nothing really nicer in the summer than going to north California's coast side and enjoying the chilly breeze, the smell of the briny ocean on a clear summer day. I can't express how beautiful and serene it can be in contrast to a beach in southern California or the waterfalls and lakes in the mountain areas such as Yosemite. I'd take the north coast over walking through the downtown of places such as Carmel or Sausalito anytime the weather is this amazing!
It's quite breathtaking!