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NauticalNickVisibility Report

Fisk Mill Cove

Salt Point · Sonoma County · California

Diver reports today · zones from today’s forecast

Visibility Breakdown

Updated through the day · times PT

Visibility by position

Post Break
headline zone
7ft
today’s forecast
Open Water
9ft
today’s forecast

Solid = diver report · outlined = today's forecast

Cross-section from the sand out to open water, split into 2 visibility zones: Post Break (0-200 ft from shore), Open Water (200+ ft from shore).
Shore
Post Break
0-200 ft from shore
Open Water
200+ ft from shore

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.

No measured readings today

Did you dive today?Please share the visibility to make our algorithm more accurate.

Report visibility
Entry type
Shore
Parking
$8 day-use
Spearfishing
Prohibited · MPA
Difficulty
Intermediate
Popular activities
Scuba · Freediving · Snorkeling

Today's forecast

Updated 4:38 PM PT today · October 13, 2026
Predicted visibility
5–9
ft
Fair
Low confidence
0510152030+ ft
Time of day
Today's forecast updates
8 ft
6 AM
Morning run
8 ft
10 AM
Wind refresh
7 ft
1 PM
Wind refresh

Dawn is the clearest window — onshore wind picks up by late morning and surface chop stirs the bottom through the afternoon.

What influences the visibility?
Contributing factors
Moderate phytoplankton
1.04 mg/m³
Major impact · Bad for vis
Regional calibration correction
+5ft
Moderate impact · Good for vis
Moderate swell
3.2 ft
Minor swell · Bad for vis
Light wind
6 kt
Minor wind · Neutral for vis
Ocean Oracle

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.
Forecasts beyond today are Pro-only
Today · Tue
Oct 13
5–9 ft
Fair
Dawn is the clearest window — onshore wind picks up by late morning and surface chop stirs the bottom through the afternoon.
Swell 3 ft at 12 s, wind 4 kt at 10 AM. No rain forecast.
Wed
Oct 14
14
Good
Ocean Oracle Pro
Thu
Oct 15
9
Fair
Ocean Oracle Pro
Fri
Oct 16
16
Excellent
Ocean Oracle Pro
Sat
Oct 17
19
Excellent
Ocean Oracle Pro
Sun
Oct 18
11
Good
Ocean Oracle Pro
Mon
Oct 19
13
Good
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Map · getting there

38.597° N · 123.353° W
Map of Fisk Mill Cove
Static map
Address
Sonoma County, CA
38.5969° N, 123.3533° W
Parking
Paved lot at Highway 1 milepost SON 42.63 and a dirt pullout at SON 43.06, $8 per vehicle Salt Point State Park day-use fee, restrooms and picnic tables on site with drinking water currently shut off.
Field notes

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 biome illustration
Biome illustration
Biome

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 biome illustration
Sub-biome illustration
Sub-biome

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 biome illustration
Sub-biome illustration
Sub-biome

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 Glossary
For snorkelers · for divers

Snorkel Species Report

Species report in production

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 →
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