Explore Oceanside Harbor Village: Located near the marina, Oceanside Harbor Village offers an array of shops, restaurants, and fun activities like boat rentals, kayaking, paddle-boarding, and whale watching. It's a wonderful spot to relax and enjoy the waterfront. 

Tour the California Surf Museum: For surf enthusiasts or anyone interested in California's surf culture, the California Surf Museum is a must-visit. It showcases the history of surfing with fascinating exhibits on legendary surfers, surfboards, and the sport's influence on local culture.

Visit the Oceanside Museum of Art: Located downtown, the Oceanside Museum of Art offers a diverse collection of contemporary art, with a focus on the works of regional artists. The museum also hosts rotating exhibitions, workshops, and community events. 

Take a Harbor Tour or Go Whale Watching: Oceanside's location along the coast makes it a prime spot for whale watching. You can take a harbor tour or a whale watching cruise to see migrating gray whales, dolphins, and other marine life in their natural habitat. 

Hike or Bike in Buena Vista Audubon Society Nature Center: For nature lovers, the Buena Vista Audubon Society Nature Center offers scenic trails through wetlands and bird watching opportunities. The center is home to a variety of native species and is a peaceful place for a hike or a picnic. 

Explore the Oceanside Sunset Market: Held every Thursday evening, the Oceanside Sunset Market is a popular local event featuring live music, street food, arts and crafts vendors, and more. It's a great place to sample food from around the world and enjoy the local culture.

Check out the Mission San Luis Rey: A historic Spanish mission, Mission San Luis Rey was founded in 1798 and is one of the largest missions in California. Visitors can tour the beautiful grounds, learn about California's early history, and explore the stunning architecture.

Go on a Brewery Tour: Oceanside is home to a growing craft beer scene. Visit local breweries like Oceanside Brewing Company, Belching Beaver Brewery, and The Lost Abbey to sample a variety of beers, from IPAs to stouts.

Take a Day Trip to Camp Pendleton: For military history enthusiasts, the Camp Pendleton Marine Corps Base offers limited public access to certain areas where you can learn about the military's role in the region. The base also has scenic beaches and hiking trails. 

Catch a Show at the Star Theatre: Located in downtown Oceanside, the Star Theatre is a historic venue that hosts live performances, including plays, musicals, and concerts. Check out their event calendar for upcoming shows and entertainment. 

Shop at the Oceanside Harbor Village: If you're in the mood for shopping, the Oceanside Harbor Village offers an assortment of charming boutique stores, including clothing shops, jewelry, and souvenirs. It's a great place to find unique gifts and locally made products.

Take a Scenic Drive Along Pacific Coast Highway: For a breathtaking experience, take a drive along the Pacific Coast Highway (Highway 101) that runs through Oceanside. The coastal views are spectacular, and the highway takes you past beaches, cliffs, and charming towns along the way.

Play Golf at Goat Hill Park: For golf enthusiasts, Goat Hill Park is a beloved local course offering challenging holes and scenic views of the coastline. It's a great spot to enjoy a round of golf and soak in the beauty of the area.