In case you haven't heard already there is a private commuter ferry service being crowdfunded. The ferry would connect Marina Bay with San Francisco before the official start of the Richmond Ferry Service that is expected to begin in 2018. For more information or to purchase advance tickets go here. Here are some of the details:
• Boats depart from Richmond Marina Bay and San Francisco Pier 1.5.
• Each one-way trip takes 35 minutes, including boarding and disembarking.