Cayou Channel — labeled Harney Channel on the chart geotag — runs between Shaw and Orcas Islands and is the east-side approach to West Sound. Depths generally run 11 to 30 fathoms.
NOAA runs a current station in the channel, but no published depth bin is confirmed yet, so there's no current-speed number here. Go through on a moderate tide stage.

Here is what the U.S. Coast Pilot says about Harney Channel and the water around it. The official text is below.
A 9-fathom shoal sits about 700 yards east of Broken Point, the north tip of Shaw Island — shallow enough to note, though still well clear of most keels.
The village of Orcas sits in a cove at the channel's west end, with a public wharf (about 9 feet alongside), a few year-round stores, and the interisland ferry slip. A covered rock sits about 125 yards south of the wharf — pass between it and the shore, where the water stays deep.
NOAA runs a current station in the channel, but no published depth bin is confirmed yet, so there's no current-speed number here. Go through on a moderate tide stage.
1. Start from
Nearest harbor on each side of the narrows. Pick a side to start there.
2. Cross to the other side of Harney Channel
West Sound Marina → Harney Channel · 2.0 nm · ~0h 15m at · from the northwest
Times are NOAA predictions, not live readings. Open a station for its full tide and current charts.
Predictions, not observations · U.S. Coast Pilot 10 (7 ed.)
U.S. Coast Pilot text is a work of the U.S. Government and is in the public domain. Per 17 U.S.C. §403, no copyright is claimed in that text. BoatRoutes is not endorsed by NOAA.