I live within 10 miles of the Pacific and so far so good with the Becker BK-7. I would think that as long as you don't use it in salt water and keep the exposed metal clean, dry and oiled between uses, it'll probably do just fine for you where you are.
For use in salt water, I'd recommend a titanium blade. I hear they don't rust at all. <img src="images/graemlins/wink.gif" alt="" />