Moonstone Beach
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.
Report visibility
Coastal Bulletin
About Moonstone Beach
Why it reads 1–5 ft
Today's forecast runs
Dawn is the clearest window — onshore wind picks up by late morning and surface chop stirs the bottom through 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
Free street parking along Moonstone Beach Drive with multiple pullouts and stairways down to the beach. Boardwalk runs the length of the bluff.
Google Maps ↗
Apple Maps ↗
See the offshore water on Pelagiscape →Clarity, temperature breaks and kelp off this beach.
About Moonstone Beach
Moonstone Beach is a roughly mile-long shore in Cambria, named for the polished moonstone agates and jade pebbles that wash up on the cobble. The shore runs along Moonstone Beach Drive, with a wooden boardwalk extending the full length of the bluff above and multiple stairways down to the cobble and sand. The substrate is mostly cobble and sand, broken by rocky outcrops and tide pools at low tide, and bull and giant kelp beds anchor on rocky bottom offshore. The entire spot sits inside the Cambria State Marine Park, a recreational-take MPA.
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
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.