The Brehon Tower
Dive site
A Victorian sea fort converted by German forces in WWII sits on a granite plateau with its base colonised by plumose anemones, dead men's fingers, and one of the largest resident conger eel populations in the Channel Islands. The tower foundations form a series of natural cavities that congers up to 2 metres use as permanent dens. Spider crabs congregate here in spring in their thousands for moulting aggregations. Tidal current runs strong; plan the dive around slack or use the tower as a windbreak on the down-current side.
Conditions
Depth
5 to 22 m
Open water and up
Current
Usually gentle
Can pick up on the edge
Visibility
7 to 15 m
Clearest in the calm season
Water
9 to 18°C
5mm or 7mm wetsuit
Month by month
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Water (°C) | 9 | 9 | 9 | 10 | 12 | 15 | 16 | 16 | 15 | 13 | 11 | 9 |
| Vis (m) | 4 | 4 | 5 | 5 | 6 | 7 | 7 | 7 | 6 | 5 | 4 | 4 |
| Current | Strong | Strong | Moderate | Moderate | Moderate | Gentle | Gentle | Gentle | Moderate | Moderate | Strong | Strong |
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