Algarve · Portugal · Reef
Castelo de Neptuno
A round reef of craters and troughs in 13 m
A round reef pitted with craters and cut by troughs, in a maximum of 13 m of water east of the Ocean Revival wrecks. It is the easy dive of the area: no depth to manage, and enough small structure in the rock to keep a macro photographer busy for a full tank.
0Where it is and how deep
37.1071° N, 8.5499° WPublished position for this site.
The dive
The reef is round in shape with a maximum depth of 13 m, and the craters and troughs cut into it are what you follow. There is no route to memorise: you drop onto the rock and work the depressions one after another, which keeps the dive slow and close to the bottom rather than turning it into a swim across open ground.
It is described as a site for everyone from novices to divers who just want a relaxed dive, and the shallow depth is what delivers that — long bottom times, good light, no decompression pressure. It is also the local recommendation for macro photography, so the craters reward the diver who stays over one patch of rock instead of covering distance.
Marine life and season
- Macro critters
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Off-season | Off-season | Fair | Good | Good | Prime | Prime | Prime | Prime | Good | Fair | Off-season |
Season follows Algarve: May–Oct is the settled season with the clearest water; Atlantic swell and cold water shut most operations over winter.
Questions divers ask
Is Castelo de Neptuno good for beginners?+
Yes. The reef has a maximum depth of 13 m and is described as suitable for everyone from novice divers upward, with the shape of the rock giving plenty to look at without any navigation problem.
Sources
- Castelo de Neptuno — Scubago
More dive sites in Algarve
Reef
Anchors from three centuries jammed in the rock
Wall
A rock wall of troughs, worked with a torch
Reef
Sheltered rock in 5 to 12 m, ten minutes out
Wreck
A 64 m survey ship, 12 m in the beam, quoted at 30 to 33 m
A Portuguese Navy frigate, 102.7 m, sunk in 30 m off Portimão
Wreck
A navy corvette scuttled in 2012, quoted at 28 m
Wreck
A navy patrol boat scuttled in 2012, quoted at 28 m
Porous rock wall packed with conger and moray holes
Similar dives elsewhere
A false ceiling right around a 10 m shoal off Corralejo
Reef
El Pinque Mushrooms
Tenerife · Spain
Two shallow terraces ending at a pair of mushroom-shaped rock heads
Lesson ground in 2 to 7 m, straight off the dive centre
A grotto rock at 5–14 m that shelters lobsters and rays