See if you can sell your bike and buy my kayak.
Tarpon 140 angler WITH RUDDER. They go for about $1300, mine for $500. Only 2 years old with 2 very minor issues. But this one is designed just for what you described and will cut thru waves and cover good distance at a fast speed.
http://losangeles.craigslist.org/sfv...754668274.html