Rosario Beach
Anacortes · North Sound · Washington
Visibility Breakdown
Visibility by position
Solid = diver report · outlined = today's forecast
Break Zone: The range of water where the waves break and sediment is stirred up.
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.
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Why it reads 8–12 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
Developed picnic-area parking lot at Rosario Beach with restrooms; Discover Pass required ($10 one-day / $45 annual). Divers typically bring a gear cart; the walk from lot to entry is short but the return with tanks is uphill enough that regulars mention it.
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About Rosario Beach
Rosario Beach sits on the southwest corner of Fidalgo Island, about 9 miles south of downtown Anacortes and inside Deception Pass State Park. The cove is reached from Rosario Beach Road, off Rosario Road at milepost 42.8, and opens west toward Rosario Head and Northwest Island. Two distinct dive profiles start from the same beach. The east side, around Urchin Rocks, stays fairly protected, with intertidal shallows near 3 feet grading into a rocky reef that has yielded documented giant Pacific octopus sightings by about 35 feet. Rounding the point toward Northwest Island puts a wall on the diver's left and moves the dive into advanced territory, exposed to the western swell and to current pulled through the Deception Pass system.
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.
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