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Treyarnon Bay

Cornwall, England · United Kingdom

What have people found?

Celtic sea slug, gutweed and montagu's stellate barnacle turn up here more than at our other rock pools. Spiny starfish, atlantic beadlet anemone and atlantic dogwhelk are the usual finds. ~15 distinct species have been recorded here. More has been recorded at Gyllyngvase Beach, 42 kilometers away.

What is the best time to visit today?

Download the app to see the 7-day schedule.

Predicted tide for Padstow, from The UK Hydrographic Office.

See low tide times at Treyarnon Bay for the next three days
  1. Sun 15 Novin the dark2:182.4 m14:472.5 m
  2. Mon 16 Novin the dark2:582.7 m15:362.8 m
  3. Tue 17 Novin the dark3:503.0 m16:403.0 m

Every low tide each day, in local time at the shore.

Plan the week in Intertidal
  • A tide chart for every day, with the best window marked
  • Identify what you find from a photo
  • An alert when a good daylight low is coming

When do people visit?

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Most observations come from April and July.

What should you know before visiting?

Parking is about 900 meters away.
Arrive 45 minutes to an hour before low tide and leave as it turns. The water comes back faster than it left.
Grippy shoes beat sandals. Wet rock and algae are more slippery than they look. Rock pool safety
A rock pool is a fragile place. Look and photograph, take nothing. The rockpooling code

What lives at Treyarnon Bay?

Species records from iNaturalist

Spiny StarfishMarthasterias glacialis
Atlantic Beadlet AnemoneActinia equina
Atlantic DogwhelkNucella lapillus
Knotted WrackAscophyllum nodosum
European Green CrabCarcinus maenas
Strawberry AnemoneActinia fragacea
Lined Top ShellPhorcus lineatus
GutweedUlva intestinalis
Blue MusselMytilus edulis
White Italian SnailTheba pisana
Blue JellyCyanea lamarckii
Celtic Sea SlugOnchidella celtica
By-the-wind SailorVelella velella
Montagu's Stellate BarnacleChthamalus montagui
bladder wrackFucus vesiculosus
Scan this rock pool on your next visit.

Every organism named, every visit logged to your journal.