Baía da Armação

A small bay closed off from the region's prevailing north winds holds the whole dive: the mooring line runs down onto a floor of rock and sand that stays shallow from top to bottom. At the base of the anchor line, two large stone discs sit apart from the rest of the terrain, and this is where the bay's seahorses are found: work the discs slowly, without stirring the sand, and they turn up more often than not. Away from the discs the rock gives way to broader sand patches where cuttlefish, common octopus and small stingrays sit half buried, and congers work the crevices between the boulders. Wrasse and seabream move over the rock, and by midsummer a thick growth of algae covers much of the reef, giving the same dive a different look from one season to the next. The rocky ground runs shallower than the sand, closer to 11 metres, so most of the dive stays inside one easy depth band, well within Open Water limits.

The seahorse encounter at the anchor-line discs is dependable, not a matter of luck, the kind of fixed, findable spot most reef dives can only offer as a maybe. Beyond it, the bay is a forgiving dive out of Sesimbra: shallow, closed off from the swell, and simple enough to navigate that it works as a first dive of the day, or for a diver who is not yet chasing depth.

Entry is boat-only from Sesimbra harbour. Current here is generally mild, matching a sheltered bay and not a drift profile.