Sesimbra · rocky reef and cavern

Gruta do Arcanzil dive guide.

A named Sesimbra rocky-bottom cavern route, listed on the marine-park map and profiled by a current local operator.

Arrábida landscape and Atlantic coast, regional above-water context rather than a photograph of Gruta do Arcanzil

Depth

Around 18 m average

Level

Open Water with guided daylight route

Access

Boat dive from Sesimbra with an authorized operator; confirm the exact open-water/daylight route, mooring and sea state.

Best season

Diving is possible through much of the year, but the operator chooses the site for wind, swell, visibility and park access; exposed western trips are less reliable in winter.

Safety

A cavern name does not authorize penetration. Stay on the guided daylight route with a visible exit and turn before training, gas or conditions are exceeded.

Hours

No fixed public hours. Boat departures, protected-area access and shore entries depend on operators, permits and sea state.

Conditions