If you want to do something fun, interesting, and different, while visiting SF, or even if you live here, go to Pier 40, and rent a kayak from City Kayak. Ted the owner, and Johnny one of his team experienced instructor will make this experience safe and fantastic for you. Everyone there has an easy friendly attitude and they are very helpful.
The kayaks, vests, paddles are clean and disinfected. They access your skills and provide basic information before you go in your discovery. The scenery is outstanding! blue skies, or not; sunny or foggy, it does not matter, the birds, sea lions, and different boats, entertain you while you have a good view of the Bay Bridge, Oracle Baseball Giants home, Chase Center, the home of Golden State Warrior, and much more. My experience was amazing and that is why a highly recommend you offer yourself this treat. I liked so much that I continue to go twice a week as my regular exercise.