I might have some thoughts if you had some photos.

Hard to tell without seeing the room and what the rest of your decor looks like, but without going overboard (so to speak), I think the surfboard will work best if there are a few other surf elements in the room. It could be something like a Hokusai print just to mix it up in a kind of witty way

'The Great Kanagawa Wave' Ornate Framed Canvas Art by Katsushika Hokusai · More Info

or this might be fun on the floor

Hand-Tufted Contemporary Swirling Stipple Rug, Blue, 4'x6' · More Info

Or this

Blue Structure Malibu Round Rug, 5'x8' · More Info

This might work in some houses

Vintage Lavoie 'Barbier 2' Canvas Art, 16x24 · More Info

Or a lamp like this

Bubbles Chandelier (Aqua) · More Info

but maybe the way to go is rattan and other natural elements like stone and driftwood for a real beach vibe.

I like the idea of framing the surfboard.