18EB Buoy
(Formerly known as the 10E Buoy)
San Luis Obispo · San Luis Obispo County · California
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 18 ft
Today's forecast runs
The clarity holds through the day, with a light afternoon onshore the only disturbance to the entry shallows.
High 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
San Luis Obispo County, CA
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See the offshore water on Pelagiscape →Clarity, temperature breaks and kelp off this beach.
About 18EB Buoy
The 18EB Buoy, which local divers knew for years as the 10E Buoy, is a navigational buoy roughly 1.5 miles north of the Morro Bay Harbor entrance, marking an offshore pinnacle and the surrounding boulder field. The pinnacle top sits at about 40 feet, and the surrounding boulders and smaller pinnacles drop to roughly 80 feet on the floor. Access is boat-only from Morro Bay Harbor. The defining feature of the site is dense giant plumose anemone cover across the pinnacle and surrounding rocks, the same anemone community as the Metridium Fields breakwater dive in Monterey but reached without a long surface swim.
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.
Spot strategies
Surf Zone
Rocky Reef
Bay
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