Diving the Kelp Forests: A Guide to Southern California Shore Diving

Diving the Kelp Forests: A Guide to Shore Diving in Southern California

For those of us living in the Sonoran Desert, the landscape is defined by saguaros, red rocks, and vast open spaces. But did you know that just a six-hour drive west lies a forest of a completely different kind? The giant kelp forests of Southern California are one of the most productive and visually stunning ecosystems on Earth. Often called “underwater cathedrals,” these towering algae plants grow from the sea floor to the surface, creating a mesmerizing play of light and shadow that feels like flying through a dense, golden jungle.

At Cactus to Coral Scuba, we believe every diver should experience the majesty of the kelp forest at least once. It is the perfect long-weekend getaway for Phoenix divers looking to trade the heat for the cool embrace of the Pacific. Whether you are walking off the beach in La Jolla or taking the ferry to Catalina Island, Southern California offers world-class shore diving that is accessible, affordable, and teeming with life found nowhere else.

The Kelp Forest Experience: What to Expect

Diving in kelp is unlike diving on a coral reef. The environment is vertical. Giant Kelp (Macrocystis pyrifera) can grow up to two feet per day and reach heights of over 100 feet. As you descend, you aren’t just looking at the bottom; you are surrounded by swaying columns of vegetation.

The light filters through the canopy in shafts, illuminating schools of fish weaving through the fronds. It is a moodier, more atmospheric dive than the bright tropics. You’ll encounter the bright orange Garibaldi (California’s state marine fish), curious sheephead, camouflaged kelp bass, and elusive octopuses. If you are lucky, you might spot a Giant Sea Bass—the size of a Volkswagen Beetle—or find yourself playing tag with a seal or sea lion.

Top Destination #1: La Jolla Cove & Shores (San Diego)

The Drive: Approx. 5.5 to 6 hours from Phoenix.

La Jolla is the crown jewel of San Diego diving. It is a marine protected area, meaning the sea life is abundant and fearless. It is also one of the easiest shore dives on the coast.

• La Jolla Shores: This is a sandy beach entry. You gear up at your car, walk across the sand, and wade in. The dive starts shallow and drops into the incredible La Jolla Canyon. This is a “muck dive” paradise where you can find horn sharks, guitarfish, and nudibranchs. In the summer, hundreds of leopard sharks gather in the shallows to breed—a snorkeler’s dream.
• La Jolla Cove: Just around the corner, the Cove features rocky reefs and dense kelp beds. Access is via stairs, but the payoff is immediate. You are instantly in the thick of the forest. The sea lions here are famous for buzzing divers, blowing bubbles, and tugging on fins. It is wild, chaotic fun.

Top Destination #2: Casino Point Dive Park (Catalina Island)

The Logistics: Drive to Long Beach or San Pedro (approx. 5.5 hours), take the Catalina Express ferry (1 hour), and walk to the dive park.

If La Jolla is the wild west, Casino Point is the manicured garden. Located in the town of Avalon, this is a dedicated underwater park. You walk down concrete stairs directly into the water—no sand, no surf, no stress.
The park is strictly protected, and the fish know it. The kelp here is often thick and healthy, and you can explore several sunken wrecks and plaques within the park boundaries. The visibility at Catalina is often significantly better than the mainland, sometimes reaching 50 to 80 feet. It is arguably the most convenient and diver-friendly shore diving experience in North America. Plus, spending the weekend in the charming town of Avalon feels like a European getaway.

The Cold Water Factor: Gear Up for Success

There is no getting around it: the Pacific is cold. Water temperatures range from the low 50s (winter/spring) to the high 60s (late summer/fall). This is not board-short diving.

To enjoy the kelp, you need the right thermal protection. A standard 3mm wetsuit will not cut it.

• Wetsuit: A high-quality 7mm wetsuit with a hood and gloves is the standard. A semi-dry suit is even better.
• Drysuit: For the ultimate experience, diving dry is the way to go. You stay warm between dives and can spend longer exploring without shivering.

If you don’t own a 7mm suit or a drysuit, don’t worry. Cactus to Coral Scuba has a rental fleet ready for you. Better yet, use this trip as the perfect excuse to complete your SDI/SSI Dry Suit Diver certification. We can do your pool orientation here in Phoenix, and you can finish your checkout dives in the majestic kelp forests!

Kelp Diving Techniques: Don’t Be a Tangler

Kelp is strong, but it can snag loose gear. Diving in the forest requires a few adjustments to your style:

• Streamline Everything: Tuck in your gauges, secure your octopus, and make sure no clips are dangling. If it sticks out, kelp will grab it.
• Slow Down: Rush through kelp, and you will get tangled. Move slowly and deliberately. If you do get snagged, stop. Do not spin around or fight it. Usually, a simple backward motion or reaching back to untangle the strand is all it takes.
• Watch Your Finning: The kelp grows from the bottom. Avoid kicking the “holdfasts” (roots) or stirring up the sediment. A frog kick is essential here.
• Look Up: The canopy is often the most beautiful part of the dive. Don’t forget to look up at the surface to see the “stained glass” effect of the sunlight hitting the amber fronds.

Plan Your California Escape

You don’t need a passport or a plane ticket to see something world-class. The kelp forests of Southern California offer a type of diving that is moody, beautiful, and full of character. It is a rite of passage for every West Coast diver.

Ready to swap the cactus for the kelp? Come into Cactus to Coral Scuba to get fitted for your cold-water gear, pick up a California fish ID slate, and get the latest tips on ferry schedules and parking. The forest is calling!