Keystone Jetty
Coupeville · North Sound · Washington
Visibility Breakdown
Visibility by position
Solid = diver report · outlined = today's forecast
Post Break: The range past where any waves are forming, where the water starts to have a significant increase in visibility. There might be some sediment here, but swell energy is diffused and the water is calmer.
Open Water: This zone is far out enough from the shore that the water is at its clearest. It’s deep enough that sediment is not disturbed by the wave energy at the surface. Haze can sit near the surface, so the water is usually clearer the deeper you go.
Through the day
Today's visibility readings at this spot, shown at the hour each one was taken.
Every bar is a reading for the Post Break zone.
This chart shows measured diver reports only.
Did you dive today?Please share the visibility to make our algorithm more accurate.
Report visibility
Why it reads 13–17 ft
Today's forecast runs
Dawn is the clearest window. A late-morning onshore builds surface chop and gives up a few feet by the afternoon.
Medium confidence
7-Day Forecast
Today is the live headline above. Tomorrow onward is the algorithm's forecast from predicted swell, wind, and rain, updated each morning and at 6 PM Pacific.
Map and parking
Fort Casey State Park lot serves the jetty; Discover Pass required ($10 one-day / $45 annual). Restrooms, drinking water, showers, park ranger station on site. Park hours 8 a.m. to dusk year-round. Adjacent to the Coupeville to Port Townsend ferry terminal; plan around ferry runs.
Google Maps ↗
Apple Maps ↗
About Keystone Jetty
Keystone Jetty sits at Keystone Harbor on Whidbey Island's central-west shore, inside Fort Casey Historical State Park at Coupeville. The jetty itself is a 75-yard-long sloping boulder pile stretching from the waterline out to about 60 feet of depth, forming a rubble breakwater on the west side of the harbor at the Coupeville-Port Townsend ferry terminal. About 250 yards east of the jetty, an abandoned military wharf still stands 10 yards offshore, with pier pilings running from about 10 feet to 35 feet, and the pilings work as a second dive profile from the same beach. Shore entry is off a smooth-stone beach adjacent to the ferry terminal, and a guide rope with cement-block anchors runs along the bottom to help divers hold position or find their way back in current.
Species found here
Researched habitat and range candidates. A listed species may be seasonal or depth-limited; this is not a confirmed sighting at this location.
Ocean Oracle ProGain the Power
of the Oracle.
Ocean Oracle sees the future. Get 7-day visibility forecasts for every beach, alerts when a prime day is coming, and a dive log that remembers every dive.
Free shows you what the ocean looks like today. Ocean Oracle shows you the week ahead, watches your beaches for you, and remembers every dive.
One full-screen map of the water off all of California: satellite water clarity and temperature, temperature breaks, seafloor shading, depth lines, surface kelp, Marine Protected Areas, currents, wind, and swell. Save your spots as pins and get an email when a temperature break comes near them.
Visibility predictions for the entire week ahead at any beach. Plan dives, schedule charters, and book trips without guessing.
When a beach on your watchlist is running good water, or the week ahead shows a good day coming, Ocean Oracle emails you. A prime window never slips past.
Every entry freezes that day's report: visibility, tide, swell, wind. Log catches, stamp Personal Bests, level up your guns, and light up your species life list.
The Coastal Bulletin greets members with the clearest water on the coast today and their own watchlist, before a single click.
Track your favorite beaches in one place. Forecasts and alerts for everywhere you dive.
A members-only board on every beach where taking fish is legal: how other members hunt the spot, with the gear, tide, season, and target species. Post your own and earn XP.
See the future. Dive on the right days.