
Sesimbra & the Arrábida · Portugal · Reef
Cabo Submarino
A disused submarine cable over rock at about 20 m
Area photo: YukioSanjo · CC BY-SA 4.0
An old communications cable, long since taken out of service, lies visible over rock formations at about 20 m and gives the site its name. Life concentrates on those rocks: pouting, seabream and wrasse over the tops, with gorgonians and sponges on the stone itself.
Where it is and how deep
38.4834° N, 9.1957° WPublished position for this site.
The dive
The site is named for what marks it: an old submarine communications cable, disabled long ago, that lies visible across rock formations at about 20 m. The cable lies over the rock rather than buried in it, so it stays in sight, and on a coast where visibility runs anywhere from a couple of metres to about 15 m an obvious line on the bottom is worth having.
Life concentrates on the formations the cable crosses. Pouting hang over the tops in numbers, with seabream and wrasse working the edges and gorgonians and sponges on the rock — the usual fauna and flora of this coast rather than anything unique to the site. At 20 m there is time to follow the cable out and work the rocks properly on the way back.
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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Fair | Fair | Fair | Fair | Good | Good | Good | Prime | Prime | Prime | Good | Fair |
Season follows Sesimbra & the Arrábida: Aug–Oct is the warmest window; sheltered bay sites are diveable all year, but cape-facing sites take Atlantic swell in any month.
Sources
- Cabo Submarino — Scubago — Scubago / SSI MyDiveGuide
More dive sites in Sesimbra & the Arrábida
Wall
Cape walls at 12–15 m strewn with River Gurara debris
Wreck
The shallower half of the River Gurara, at 23 m
Wreck
The deeper half of the River Gurara, at 28 m
Reef
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Easy 13 m rock where octopus, cuttlefish and squid lay eggs
Wreck
Tile-carrying wreck at 55–65 m, expert divers only
Pinnacle
Surface-breaking rock at 15 m with nudibranchs in the cuts
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Gorgonian carpet at 28–30 m where sunfish come to be cleaned
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