Scuba Diving the Oregon Coast: What to Expect and Where to Go
Christie Davis Aug 14, 2026
Oregon isn’t the first place people picture when they think “scuba diving.” No coral reefs, no bathtub-warm water, no glass-clear visibility. What you get instead is cold, moody, and genuinely wild: sea lions, wolf eels, giant Pacific octopuses, and a coastline with more shipwreck history than almost anywhere on the West Coast.
If you’re considering it, here’s what to actually expect, plus where to go once you’re certified.
The water is colder than most people think
Coastal water temperatures here run from the upper 40s to upper 50s Fahrenheit, depending on the season and location, according to Divers Alert Network. That’s cold enough that a wetsuit isn’t going to cut it for most divers. A drysuit is standard gear on the Oregon coast, not an upgrade.
Visibility swings a lot too. DAN puts the typical range at 5 to 15 feet, with up to 40 feet possible on a good day, usually further offshore away from river mouths. Spring and fall tend to bring the clearest water.
None of this is a reason to skip Oregon diving. It’s just why training and the right gear matter more here than they would somewhere warmer.
Where to dive near Astoria
The north coast has a handful of solid local sites, though weather calls the shots more than anywhere else on the coast:
Fort Stevens South Jetty, at the mouth of the Columbia River, is a classic Astoria-area dive. It’s also weather-dependent to the point that conditions have to line up almost perfectly, according to Oregon Dive Sites.
Hammond Boat Basin, with jetties on both the north and south sides, is another local option that’s a little more sheltered.
When the north coast is blown out, which happens often, divers head down to Tillamook Bay, where sites like Barview and Garibaldi’s jetties, Crab Rocks, and the Lumber Dock give you options even when one spot isn’t diveable. Having a backup plan is just part of diving this coast.
Farther south, bigger scenery
If you’re up for a road trip, Oregon’s south coast around Port Orford has some of the best diving in the state. Scuba Diving Magazine highlights spots like Redfish Rocks Marine Reserve and Island Rock, where you’ll find kelp forests, wolf eels, and a real chance of a gray whale swimming past. These are deeper, more advanced sites, best done with a guide who knows the area.
The “Graveyard of the Pacific”
Astoria sits at the mouth of the Columbia River, one of the most dangerous river bars in the world, and the reason this stretch of coast earned the nickname “Graveyard of the Pacific.” The wreck of the Peter Iredale, a four-masted ship that ran aground in 1906, is still visible on the beach at Fort Stevens State Park today. If you want the full history, the Columbia River Maritime Museum right here in Astoria is worth a visit before or after a dive trip.
What you need before you go
Every one of these sites requires solid buoyancy control, a drysuit you’re actually comfortable in, and enough experience to handle limited visibility and current. If you’re newer to diving, an Open Water certification is the starting point, and specialty courses like Drysuit Diver and Deep Diver will get you ready for what the Oregon coast actually throws at you.
Astoria Scuba and Adventure Sports is a NAUI Pro-Platinum training facility based right here in Astoria. We teach the certifications that prepare you for local conditions, and we carry the drysuits and cold-water gear to match. Stop by the shop or check out our courses to get started.
