I no longer live in the Bay Area (am in Los Angeles now), but, as an avid surfer and entrepreneur as well thought I'd chime in with some comments.

First off, I agree with a lot of the comments here. Living in a new place isn't going to magically cause you to work less or more. This is largely based on your own mentality, regardless of location. There is always going to be more work to do, no matter where you live, if you want to work 90 hour weeks. You have to set your own limits and stick to them; geography isn't going to change that for you.

If surfing is important to you, and it's something that gets you away from the office multiple times a week, you should seriously consider moving to somewhere closer to the beach. Especially if your health is suffering otherwise, and you want to be in decent physical or mental shape to continue doing it for the rest of your life.