
Radar Reef
Cayman Brac · Cayman Islands
Radar Reef is a classic Caribbean spur-and-groove reef on Cayman Brac's north coast, named for the island's radar station visible from the surface. The reef crest at 10 metres drops away through a series of coral buttresses into a sandy terrace at 25 metres, where garden eels sway in the current and free-swimming moray eels patrol the groove floors. The site attracts reliable schools of horse-eye jacks and is an excellent night dive for octopuses and hunting lionfish.
Conditions
Depth
8 to 27 m
Open water and up
Current
Can be moderate
Can pick up on the edge
Visibility
12 to 22 m
Clearest in the calm season
Water
25 to 30°C
Skin or 1mm
Month by month
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Water (°C) | 26 | 25 | 26 | 27 | 28 | 29 | 29 | 29 | 29 | 28 | 27 | 26 |
| Vis (m) | 18 | 18 | 18 | 15 | 15 | 12 | 12 | 10 | 10 | 12 | 15 | 18 |
| Current | Gentle | Gentle | Gentle | Moderate | Moderate | Moderate | Moderate | Moderate | Strong | Moderate | Gentle | Gentle |
Your chances of seeing each animal
Red lionfish
Last confirmed Mar 24, 2026 · 25 records
Very likely
Most dives
Nassau Grouper
Last confirmed Jun 16, 2026 · 27 records
Very likely
Most dives
Caribbean Land Hermit Crab
Last confirmed Mar 28, 2026 · 25 records
Very likely
Most dives
Green moray eel
Last confirmed Dec 7, 2025 · 5 records
Very likely
Most dives
Elkhorn Coral
Last confirmed Dec 13, 2025 · 31 records
Likely
About 6 in 10 dives
Horse-eye jack
Last confirmed Aug 4, 2025 · 2 records
Likely
About 6 in 10 dives
Caribbean Elaenia
Last confirmed Mar 29, 2026 · 4 records
Likely
About 6 in 10 dives
Garden eel
Expected
Known here, not yet in recent logs
Gear