Agree with samsen re: navigation and link to your site.
As for the tumblr page, I think there is too much dead white space for my taste.
I like most of the surf shots, wish there were some more in B&W - I like the couple/few I saw. If this is for portfolio, do you do other stuff or are you really focusing on surf? Seems like you might want to show off some other types of shots if you have them. I saw some cars and rollerblading, but not sure what else because I would have to scroll a long time - this is why some navigation that samsen mentioned would be important.
Thanks for sharing!