What skill level is the Twin Fin for?

The Twin Fin is designed for Intermediate/Advanced surfers.

What kind of waves is the Twin Fin best in?

The Twin Fin works best in Beach and Point Breaks.

What wave size does the Twin Fin suit?

The Twin Fin performs best in 2-6ft waves.

What fin setup does the Twin Fin use?

The Twin Fin has a Twin+1 set up.

What type of surfboard is the Twin Fin?

The Twin Fin has a Performance Twin outline.

What volume does the Twin Fin come in?

The Twin Fin is available in a 22.6–41.2 L volume range.

Twin Fin

Name: Twin Fin
Brand: Channel Islands

Channel Islands

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Owners Rating:

The CI Twin Fin combines a retro 70s feel with modern performance. Inspired by Al Merrick’s late-70s twin fin and updated by Britt Merrick, it features a refined low rocker for enhanced drive and carving ability. The Twin Fin excels in a variety of conditions, from weak beach breaks to quality waves like Rincon. With tapered rails and a thin feel, it offers added sensitivity and responsiveness, offsetting the typical high-volume retro design. Ride it 2-4 inches shorter, 1/2 to 1 inch wider, and 1/8 to 1/4 inch thicker than your standard shortboard.

Specs Overview

Outline: Performance Twin

Ability Level: Intermediate/Advanced

Wave Height: 2-6ft

Wave Type: Beach and Point Breaks

Fin Type: Twin+1

Concave: Single to Vee in the Tail

Entry Rocker: Low

Exit Rocker: Low

Overall Rocker: Low

Rail Type: Low

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Quick compare

	Twin Fin Channel IslandsThis board	Fishbeard Channel Islands
Dimensions
Wave Height	2-6ft	1-5ft
Concave	Single to Vee in the Tail	Full Single Concave
Entry Rocker	Low	Moderate
Exit Rocker	Low	Low/Moderate
Rail Type	Low	Medium

Silhouettes are normalized to the same nose-to-tail length, so this is a shape comparison rather than a true-scale view. Outlines are generated automatically from product photos, not CAD files, so minor inaccuracies can occur.

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Frequently asked questions

What skill level is the Twin Fin for?: The Twin Fin is designed for Intermediate/Advanced surfers.
What kind of waves is the Twin Fin best in?: The Twin Fin works best in Beach and Point Breaks.
What wave size does the Twin Fin suit?: The Twin Fin performs best in 2-6ft waves.
What fin setup does the Twin Fin use?: The Twin Fin has a Twin+1 set up.
What type of surfboard is the Twin Fin?: The Twin Fin has a Performance Twin outline.
What volume does the Twin Fin come in?: The Twin Fin is available in a 22.6–41.2 L volume range.

Channel Islands

Channel Islands Surfboards, headquartered in Santa Barbara, California, is a renowned surfboard manufacturing company founded by Al Merrick in 1969. Known for its high-performance surfboards, the company has become a staple in the surfing community. Over the years, Channel Islands Surfboards has collaborated with many surfing legends, including Kelly Slater and Tom Curren, and more recently Dane Reynolds and Mike February. CI has won 3 Stab In the Dark with their models Fever, CI Pro, and CI 2.Pro.

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