We drove to La Jolla Cove. There is parking nearby. We rented wet suits, fins, masks, and snorkels for $20.50 per person. I am not sure that place is still open. Afterwards, we rode our bikes along the bike route. It was a very nice ride along the coast. You can stop at any beach you see, so you can get away from people.
We had to ride a little far to get to the kayaking place. It's called Bike, Hike and Kayak. You can rent kayaking equipment and bikes. You walk down to the beach, they help you into a kayak, and away you go. It was so much fun, I can't wait to visit again.