Fisk Mill Cove
Salt Point · Sonoma County · California
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.
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Report visibilityToday's forecast
Updated 4:38 PM PT today · October 13, 2026Dawn is the clearest window — onshore wind picks up by late morning and surface chop stirs the bottom through the afternoon.
7-Day Forecast
Map · getting there
38.597° N · 123.353° W
About Fisk Mill Cove
Fisk Mill Cove is a long, indented cove at the north end of Salt Point State Park, marked at its northern head by Sentinel Rock, a sea stack with a wooden viewing deck reached from the north parking pullout. The bottom is a shallow rocky shelf between 10 and 20 feet before dropping into a boulder field with steep-sided pinnacles, underwater caves, and arches. A large bull-kelp bed sits offshore.
The cove takes its name from the Fisk lumber mill, which operated here between 1868 and 1874 as a doghole port where schooners moored inside the cove and loaded redwood off the bluff. Before the statewide abalone fishery closure in 2018, the cove was long one of the best-known dive sites in Salt Point State Park.
The offshore bed is a kelp forest biome, with bull kelp anchored on the rocky bottom and growing up through the water column to the surface in season. Palm kelp and scattered boulders cover the shallow shelf inside the cove, making that section a rocky reef biome. Pinnacles, underwater caves, and arches on the outer reef form a canyon biome.
Diving here is observation only. Two parking areas serve the cove: a paved lot at Highway 1 milepost SON 42.63 and a dirt pullout at SON 43.06, both charging the Salt Point State Park day-use fee of $8 per vehicle. Restrooms and picnic tables sit at the parking areas, and drinking water is currently shut off. The Stewarts Point State Marine Reserve boundary line runs at 38°35.600'N, between the two lots, so the main dive water sits inside the SMR where take of any living, geological, or cultural marine resource is prohibited.

Kelp Forest
The kelp forest biome is giant kelp anchored to rocky bottom and growing up through the water column. The canopy and stipes form a three-dimensional habitat that shelters fish, invertebrates, and the predators that hunt them. Learn more about this biome and the species found in it by clicking the link below.
Learn more in the Biome Glossary
Rocky Reef
The rocky reef biome is bare rock, boulder, and cobble structure without a kelp canopy above it. The hard relief and its crevices shelter invertebrates and reef fish, and the structure concentrates life that the surrounding sand cannot hold. Learn more about this biome and the species found in it by clicking the link below.
Learn more in the Biome Glossary
Canyon
The canyon biome is sharp vertical relief with a real depth change, including walls and drop-offs. The structure draws current-borne food and concentrates fish and large predators along its edges. Learn more about this biome and the species found in it by clicking the link below.
Learn more in the Biome GlossarySnorkel Species Report
The fish found at Fisk Mill Cove are being researched for the Ichthyopedia. This section fills in as species are mapped to this beach.
Browse the Ichthyopedia →Nearby beaches
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