Sound of Mull
Oban · United Kingdom
The Sound of Mull is a narrow deep channel between the Isle of Mull and the Scottish mainland, its fast tidal currents creating upwellings that fuel extraordinary biomass. Dense communities of dead man's fingers, plumose anemones, and feather stars coat the rocky walls, while large Atlantic cod and pollack patrol the mid-water. The Sound contains multiple dive sites ranging from sheltered bays to exposed points where drift diving in the tide rush delivers sightings of basking sharks in summer.
Conditions
Depth
8 to 35 m
Advanced depths
Current
Can be moderate
Can pick up on the edge
Visibility
8 to 15 m
Clearest in the calm season
Water
6 to 16°C
Drysuit
Month by month
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Water (°C) | 6 | 6 | 6 | 7 | 8 | 10 | 12 | 13 | 12 | 10 | 8 | 6 |
| Vis (m) | 5 | 5 | 8 | 8 | 10 | 8 | 8 | 8 | 8 | 8 | 5 | 5 |
| Current | Strong | Strong | Strong | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Strong | Strong | Strong |
Your chances of seeing each animal
Hooded Crow
Last confirmed Jun 22, 2026 · 73 records
Almost always
Nearly every dive
Common Chaffinch
Last confirmed Jun 17, 2026 · 52 records
Almost always
Nearly every dive
Eurasian Oystercatcher
Last confirmed Jun 26, 2026 · 65 records
Very likely
Most dives
Thornback Ray
Last confirmed Sep 5, 2024 · 1 records
Likely
About 6 in 10 dives
Basking Shark
Last confirmed Sep 19, 2024 · 1 records
Sometimes
About 1 in 3 dives
Atlantic Cod
Expected
Known here, not yet in recent logs
Common Octopus
Expected
Known here, not yet in recent logs
Gear