A reef a short boat ride from the dive base, open to entry-level divers and listed by the operator for photography and marine biology as much as for the topography. Rock and sand plateaus alternate and step gradually down to 18 metres, where the reef itself rises about six metres vertically off the bottom.
Also known as Agios Petros' Reef, St. Peter's Reef.
Where it is and how deep
39.1877° N, 23.9275° EPublished position for this site.
The dive
The run out is 0.3 nautical miles, so you are in the water within minutes of leaving the base. Underneath you the seabed alternates between rock and sand, laid out as a series of plateaus that lead you deeper in steps rather than dropping away, which makes the descent easy to control and keeps the whole dive inside entry-level limits.
At 18 metres the plateaus end at the reef itself, a formation that expands vertically about six metres off the bottom and fosters the biodiversity Mediterranean rock reefs are known for. Work along it, then finish shallow over the plateaus; a full profile runs 45 minutes to an hour. The dive centre also rates the site as one of the diving highlights of the area and an ideal place for night diving.
Marine life and season
The sources we used don't single out particular species here.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Off-season | Off-season | Off-season | Fair | Good | Prime | Prime | Prime | Prime | Good | Off-season | Off-season |
Season follows Alonissos & the Peristera Wreck: The underwater museum and most operators run May–Oct only; meltemi winds can close the exposed Peristera site in midsummer.
Questions divers ask
How deep is the Agios Petros dive site?+
The operator lists the site at 10 to 18 metres, with the reef at the deep end rising about six metres off the bottom. That keeps it inside entry-level limits, and the dive centre opens it to Scuba Diver certification and above.
Is Agios Petros suitable for a night dive?+
Yes. The dive centre calls it one of the diving highlights of the area and an ideal place for night diving: the run out is only 0.3 nautical miles and the profile stays within 18 metres.
Sources
- Agios Petros' Reef dive site — Ikion Diving Alonissos
- Alonissos Triton dive sites — Alonissos Triton Dive Center
More dive sites in Alonissos & the Peristera Wreck
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Cave & cavern
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