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Aerial satellite view of Moonstone surf break in San Luis Obispo County, California, United States
San Luis Obispo County, California, United States

Moonstone

35.573, -121.114
Edited by Tom Jackson
Verified May 2026
Editor-reviewedCross-checked against WannaSurf
At a glance
  • Moonstone is a a-frame over beach, mellow beach peaks, long walling rights and lefts.
  • Beginner to intermediate ability, working 2-6 ft.
  • Peak September to March, water 10-16°C.
A-frame · BeachBeginner → Intermediate2–6 ftJan – Dec

A mellow beach break on the Northern California coast near Trinidad, Moonstone catches swell from multiple directions and delivers long rights and lefts when the sandbars line up. Best in SW to NW swell at 2-6ft with light offshore winds out of the east. Mid to high tide keeps the banks fuller and reduces the close-out tendency that plagues the spot on low tide or oversized days. Conditions suit beginners and longboarders most of the time, though the paddle-out gets genuinely challenging when bigger sets are closing out the beach. Weekdays are quiet with only a handful of surfers in the water, weekends draw more of a crowd, especially in summer. Bottom: sand. Season: fall and winter for swell consistency. Consistency: moderate, highly variable sandbars. When it clicks, the peaks reel through multiple sections all the way to the sand, but Moonstone is fickle enough that you should check it fresh rather than relying on nearby spots as a proxy.

Wave fit

Skill suited
Beginner → Intermediate
BegIntAdv
Best months
Jan – Dec
J
F
M
A
M
J
J
A
S
O
N
D
Character
Mellow beach peaks, long walling rights and lefts.

Conditions

When it works
Optimum tide
Mid and high tide
Trip planning

Quick facts

Water temp
10° to 16°C
Wetsuit
4/3 + booties in winter, 3/2 in summer
What to bring
  • Longboard or mid-length for most conditions
  • Shortboard 6ft to 6ft 6in on better days with longer walls
Lineup
Easy-going
Where it sits

Location

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About this break

What it's actually like

Crowd & Localism

Weekday sessions are typically low-pressure with a small, relaxed crew. Weekends and any decent swell window in summer will pack the lineup. Localism is mild, but experienced locals know how differently the sandbars break from each other and will position accordingly. Beginners should stick to the inside on bigger days.

Access & Facilities

Moonstone Beach is off Highway 1 near Trinidad, about 25km north of Arcata. Parking is straightforward. Stop by Salty's Bait and Tackle in Trinidad for local surf and fishing intel. Water temperatures run cold year-round on this stretch of the NorCal coast, so a 4/3 or thicker suit is standard most months, with booties recommended in winter.

Nearby Alternatives

If Moonstone is closing out, Trinidad Head and the surrounding area offer different swell exposures and wind protection worth checking. Camel Rock and other beach breaks along this stretch can fire on the same swell windows but behave differently depending on sandbar conditions.

10-day swell, wind and tide

Moonstone surf forecast

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Forecast by Windy.app

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Frequently asked

What you need to know before paddling out at Moonstone

What skill level is Moonstone suited for?
Moonstone is a beach bottom, mellow beach peaks, long walling rights and lefts, break suited for beginner through intermediate surfers. Beginners can give it a go on the smaller end of the size range.
What size does Moonstone work best at?
Working size is 2 to 6 ft. Below 2 ft the swell goes flat. Above 6 ft it tends to close out.
When is the best season to surf Moonstone?
Moonstone fires from September through March. Outside that window the swell window narrows and the lineup goes quiet.
What swell direction does Moonstone need?
Moonstone switches on with swells out of the SW to NW (225 to 315 degrees).
What type of wave is Moonstone?
Moonstone is a a-frame-breaking wave over beach. Mellow beach peaks, long walling rights and lefts.
How crowded is Moonstone?
Vibe is easy-going. Smile, share waves, and you will be welcomed.

Sources

  • WannaSurf
Moonstone
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