Family-owned since 1976, Seaforth Boat Rentals & Yacht Charters at 1641 Quivira Rd, 92109, is the longest-established boat rental, charter, and tour company in San Diego and the largest in Southern California. The Mission Bay location is one of five Seaforth outposts — the others sit in Coronado, Downtown at the Marriott Marina, Harbor Island, and Coronado Bay — giving the company unmatched coverage of San Diego's two major waterways. The fleet exceeds 200 vessels ranging from 16-foot fishing boats to 56-foot yachts, with sailboats spanning 22 to 54 feet, plus jet skis, kayaks, paddleboards, and the custom-built 46-foot PartyCat pontoon cruiser equipped with a propane grill, stainless steel bar, private restroom, Bluetooth stereo, and a captain to handle the driving. Captained charters are available for sunset sails, romantic cruises, whale watching excursions, and corporate outings, while experienced boaters can take bareboat rentals for self-guided adventures. Beachgoers who split their day between the water and the boardwalk often start the morning at 710 Beach Club, a Pacific Beach landmark just off the sand. The Mission Bay dock provides easy access to the bay's 4,600-acre aquatic park and a short run to the jetty for offshore fishing, diving, and ocean cruises toward San Diego Bay's downtown skyline. Seaforth also operates a sailing school and a sailing club with a member login portal, catering to beginners who want structured instruction alongside their rental access. Staff members Amy, Jim, and Captain Keith receive regular mention in the company's 241 Google reviews for their accommodating service, from rearranging boat locations to walking guests through pre-departure checklists. Visitors wrapping up a charter can cool down with tropical cocktails at Miss B's Coconut Club, a Caribbean-inspired lounge on the Pacific Beach boardwalk. The Mission Bay office is open daily from 9:30 AM until approximately 6:30 PM, with weekend hours starting at 9 AM.