Oceanside Adventures is a luxury whale and dolphin watching company located in front of the historic Lighthouse in Oceanside Harbor, offering 2-hour narrated tours year-round on state-of-the-art catamarans including the 50-foot Oceanside Adventures (45 passengers) and the 63-foot NALA, ideal for families, couples, private parties, and corporate events to view marine wildlife close to the harbor.

Oceanside Sea Center offers private group charters for sport fishing, whale watching, floating marine science labs, and burials at sea using a fleet of 5 boats, including the 60-foot Sea Star which has operated since 1982 out of Oceanside Harbor.

Custom Sailing Tours and Cruises from the Oceanside Harbor Marina for individuals and private groups. Sail with up to six guests on a 2, 4 or 6-hour sailing experience aboard the affordable Luxury Sailboat Yacht, La Bella Vita. Sail morning, afternoon or enjoy a romantic sunset voyage. Unique charter services include scattering the cremated remains of loved one(s) at sea with compassion, dignity and professionalism. Special requests welcome including pet-friendly, educational, exciting, fun, and relaxing sails. Wind-powered, pet-friendly, and educational experiences with opportunities to see dolphins and whales.

Helgren's Sportfishing is Oceanside, California's premier deep sea fishing and exploration charter company, family-owned and operated since 1978 with over 40 years of experience. They offer a range of fishing trips from ½ and ¾ day excursions, private charters, whale watching, sea life excursions, and burials at sea, operating a fleet including the 78-foot USCG certified vessel Electra and Fisherman III.

Sea Star Charters, established in 1982 and operated by Captain Joe Cacciola from Oceanside Harbor north of San Diego, offers private group sport fishing charters on the 60-foot Sea Star vessel. Services include deep sea fishing, whale watching, sea life adventure tours, floating marine science lab programs for students, and memorial services with scattering of cremated remains at sea. The crew provides professional, friendly service focused on customer satisfaction, safety, comfort, and catching fish.