Enter the following at the Title screen:

Master Code:
Hold L1 + R1 and press Down, , , Down, Right, , .

Get All Surfers:
Hold L1 + R1 and press Left, , Up, Right, , Left, Left.

Get All Surf Boards:
Hold L1 + R1 and press Left, , Up, Down, , Left, Down, , X.

Get All Beaches:
Hold L1 + R1 and press Down, Up, Left, Left, Down, , , Right.

Thanks to Revolution readers One Large Toe and Ian is Pro!