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NauticalNickVisibility Report

Trestles Beach

San Clemente · San Diego County · California

Today’s conditions · not a forecast

Visibility Breakdown

Updated through the day · times PT
Last reading 7:01 AM

Visibility by position

Post Break
headline zone
8ft
auto reading
Open Water
12ft
auto reading

Solid = diver report · outlined = our reading

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.

8
7a
auto
9a
soon
10a
soon
11a
soon
1p
soon
3p
soon
5p
soon

✓ = reading reviewed by hand

auto = reading not yet reviewed by hand

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

Report visibility
Entry type
Shore
Parking
Street + lot · 1 mi walk
Spearfishing
Legal
Stingray risk
Medium
Difficulty
Intermediate
Popular activities
Surf · Fish · Swim
Today's forecast

Why it reads 6–10 ft

Updated 7:03 AM PT today · October 27, 2026
Post-break clarity baseline
Neutral
typical
Moderate impact
Moderate swell
Neutral
2.0 ft
Minor swell
Short-period chop
Hurts vis
7.0 s
Minor chop
Light wind
Helps vis
5 kt
Minor wind
Live reading cap (carried)
Hurts vis
carried forward, 14 h ago
Minor impact

Medium confidence

Ocean Oracle

7-Day Forecast

Days 2 to 7 are Pro

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.

Today · Tue
Oct 27
6–10ft
Fair
Open Water 12 ft
Swell 2 ft at 12 s, wind 2 kt at 10 AM. No rain forecast.
Wed
Oct 28
14
Good
Open Water 21 ft
Thu
Oct 29
9
Fair
Open Water 14 ft
Fri
Oct 30
16
Excellent
Open Water 24 ft
Sat
Oct 31
19
Excellent
Open Water 27 ft
Sun
Nov 1
11
Good
Open Water 17 ft
Mon
Nov 2
13
Good
Open Water 20 ft
Unlock days 2 to 7
7-day forecasts come with Ocean Oracle Pro · $5/mo
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Getting there

Map and parking

33.3845° N · 117.5930° W
Map of Trestles Beach at San Mateo Point
Address
S El Camino Real & Cristianitos Rd
San Clemente, CA 92672
Parking
Street + lot · 1 mi walk

No road reaches the beach. Free street parking and a paid lot sit at South El Camino Real and Cristianitos Road, followed by a walk of roughly 1 mile down the Trestles Beach Trail under Interstate 5. A separate 1.5-mile nature trail connects San Mateo Campground to the same sand.

See the offshore water on Pelagiscape →Clarity, temperature breaks and kelp off this beach.
Field notes

About Trestles Beach

Bottom
Cobblestone reef from San Mateo Creek
Offshore reef
Wheeler North Reef, 38 to 50 ft, about half a mile out
Olympics
Surfing at the 2028 Los Angeles Games
Walk in
About 1 mile on the Trestles Beach Trail
Protection
No MPA, standard state rules

Trestles Beach is the cobblestone shoreline at San Mateo Point, where San Mateo Creek reaches the ocean at the northern end of San Onofre State Beach. The name comes from the railroad trestle that carries the tracks over the creek behind the sand. The Orange and San Diego county line crosses the point, putting the beach in San Diego County with the San Clemente bluffs immediately north of it in Orange County. Surfers split the stretch into breaks named from north to south, Cottons and Uppers above the trestle and Lowers and Middles below it. California State Parks has managed the land since 1971 under an agreement with the Navy, which holds it as part of Marine Corps Base Camp Pendleton, and the Trestles Wetlands Natural Preserve sits behind the beach along the lower creek.

From the Nautilids who hunt it

Spot strategies

Ocean Oracle Pro
Unlock spot strategies
How other Nautilids actually hunt Trestles Beach: the biome they worked, the gear, the tide and time of day, and what they were after.
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Pelagiscape Offshore Map

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.

7-Day Forecasts

Visibility predictions for the entire week ahead at any beach. Plan dives, schedule charters, and book trips without guessing.

Prime-Day Alerts

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Dive Log

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.

Front-Page Oracle

The Coastal Bulletin greets members with the clearest water on the coast today and their own watchlist, before a single click.

Watchlists

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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.

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