Treyarnon Bay

St Merryn · Cornwall · United Kingdom

Today’s forecast: the current surf forecast for Treyarnon Bay (wave height, swell, wind, tide and a 0–10 rating for every hour of the next 16 days) are only shown on SurfCams. They change every hour, so this text doesn’t contain them. To check today’s surf, open https://surf-cams.com/spot/treyarnon-bay.

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Treyarnon is a small sandy bay just south of Constantine, with rocks and pools around it and a youth hostel above. The beach gives peaks both ways. There is also a low-tide left over the reef, but only when the sand has settled in the right place. Fewer people surf here than at the bays next door.

Level
Intermediate
Break
Beach break, sand and rock
Waves
Lefts and rights
Crowd
Some company
Season
autumn, winter, spring
Boards
A shortboard or a fish.

When it works

✓ A 1–2 m west swell with an easterly wind, around low tide.

When it doesn't

✕ High tide pushes the waves onto the rocks, and onshore winds ruin it.

Watch out for

  • rips
  • rocks

Best months

March, April, May, September, October, November

Local tips

Don't count on the reef left: it needs the sand in just the right spot. On busy days the car park is often full.

Getting there

A car park above the bay and a slipway to the beach.

Travel notes

How often it works
Fairly consistent on west swells, but the bay is small and it is best around low tide.
Crowd and vibe
Usually relaxed, with hostel guests and a few locals.
Camping and vans
Trethias campsite is close to Treyarnon, and the YHA hostel stands above the beach. Nearest campsite about 0.5 km away.
Facilities
A beach shop, toilets, the YHA hostel with sand-chair hire, and lifeguards in summer.
Water quality
Rated excellent in the 2025 English bathing-water classification (Treyarnon Bay).

Ideal conditions

Swell
W–NW best, WSW–NNW works
Size
1–2 m offshore swell; starts at 0.6 m, holds to 2.5 m
Period
8 s minimum, best from 11 s
Wind
Offshore ENE–SE; handles onshore up to 12 km/h
Tide
low best, avoid high
Faces
WNW (290°)

Live cam

No cam at this spot yet: the forecast and the guide are on the map.

Nearby spots

All spots in Cornwall · All spots

Sources