As the other's have said, 3 m is very short for offshore where you want to go.
As John said, the Hobie Adventure is very stable, and you have pedal power... a distinct advantage at times over paddle power. However, in surf, even better is a Stealth, with the fish hatch for safe rod stowage. Moffats and Kings Beach launches can be tricky with a bit of swell.
Consider Billpat's Prowler, a proven performer as an offshore yak.