
Baixa do Sul
Terceira · Portugal
A submerged volcanic bank off Terceira's south coast, Baixa do Sul tops out at 18 metres and falls away into open Atlantic water beyond 50 metres. The plateau draws mobula rays in summer — sometimes in squadrons of 30 or more — and blue sharks appear around the edges of the bank with regularity from June onward. The hard substrate is carpeted in encrusting sponges and lace coral, and common dolphins occasionally dive down to investigate divers at shallower depths. The site demands a live boat due to surface swells and current.
Conditions
Depth
18 to 55 m
Advanced depths
Current
Usually gentle
Can pick up on the edge
Visibility
25 to 35 m
Clearest in the calm season
Water
15 to 24°C
5mm wetsuit
Month by month
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Water (°C) | 16 | 15 | 15 | 16 | 17 | 19 | 21 | 22 | 22 | 20 | 18 | 17 |
| Vis (m) | 15 | 15 | 15 | 18 | 20 | 22 | 25 | 25 | 22 | 20 | 15 | 15 |
| Current | Strong | Strong | Strong | Moderate | Moderate | Gentle | Gentle | Gentle | Gentle | Moderate | Moderate | Strong |
Your chances of seeing each animal
Blacktail Comber
Last confirmed Apr 14, 2026 · 14 records
Very likely
Most dives
Conger Eel
Last confirmed Nov 22, 2025 · 14 records
Very likely
Most dives
Common Dolphin
Last confirmed Jul 5, 2026 · 21 records
Likely
About 6 in 10 dives
Amberjack
Last confirmed Nov 9, 2024 · 3 records
Likely
About 6 in 10 dives
Lace Coral
Expected
Known here, not yet in recent logs
Encrusting Sponge (mixed species)
Expected
Known here, not yet in recent logs
Atlantic Wrasse
Expected
Known here, not yet in recent logs
Mobula Ray
Expected
Known here, not yet in recent logs
Gear