[DonC]

Lived in Monterey/Carmel for almost 10 years. What you don't tell the tourists is that the best weather for the central and northern CA coast is late April to early June and late September to mid November. During "high summer" the central valley heat sky rockets up and the rising air sucks the fog into the coast.
In mid summer I could go to the Thunderbird Bookstore a mile down Carmel Valley, sit in the sun and have breakfast and look 1/4 mile down the road towards the coast and see the fog bank just sitting there.
The Oregon coast is very similar but not quite as severe. Our temps up here can be a little less radical in their swings. Always have a jacket in the car when I'm going to the coast even when it's forecast to be nice.
DonC