This is a great park to visit. Children between 3-10 will especially have a great time. Don't miss the main shows and get a schedule and plan your day around the show times.
My favorite memory was seeing the Shamu show at night time. They use a lot of lights and the big jumbo screen. We bought three bottles of hot chocolate from the walking vendors to keep warm. If you're going to see this show, (and you should because it's Sea World's main attraction) do try to see it at night.
But San Diego's coastal weather can be chilly, so bring a jacket. Don't be fooled by southern California's warm weather. This park is right on the ocean so it can get pretty chilly. We were there in June, too, so we were thought it would be warm, but it was COLD!