There are guys out there on small craft like that. I think you'd be fine if its glassy. If its choppy it'll be like a roller coaster on that thing. Take a look at the wind forecast before you go. Big surf could be tricky too, but mainly on the way out. I would think that's an easy boat to surf.
Wind
http://www.iwindsurf.com/windandwher...orecast+Graphs
Waves, click on the wave height graph to see swell period and direction
http://www.surfermag.com/surf-report...egionID=8&rt=S. CA (San Diego)
If you get in trouble I'm sure one of the hobie drivers would pull you in for a nominal fee!