Overview
Humboldt Harbor Entrance sits between the North and South jetties at the mouth of Humboldt Bay, and it's one of the central spots for the area's surfers. The bottom is sand, so the shape shifts from swell to swell, but when it's on it throws a Pipeline-like left and a steep, dredging right. Those rights barrel straight into the boat channel, which runs about 45 feet deep, so there's a lot of water moving through here.
When It Works
It takes a serious swell to break, drawing swell from west to north-northwest (W-NNW). The wave is usable from 1.8 m / 6 ft to 6.1 m / 20 ft, so you need real size before it turns on, and it holds well into the biggest swells. The season runs through autumn and winter, roughly September to February, and when everything lines up it's one of the better waves around.
Wind and Tide
The offshore direction is west (W), and the workable wind window is fairly open across other directions. Tide is the key call here: low tide is the optimal window, with a rising tide generally the better of the two. The currents through the entrance are strong, though, so time your session tightly around low and stay aware of the pull.
Local Tips
This is an expert-only wave. Bring a gun when it's big, and a tow board for the outside bar once it's well overhead. Expect a busy lineup when it's working, with a friendly atmosphere in the water.
Access
Getting there is easy: take Samoa Boulevard (Route 255) from Eureka or Arcata and drive until you reach the ocean at Samoa. Getting in means jumping off and clawing back onto the jetty. Watch for strong currents and the chance of great white sharks in the area.
