Macdonald Reef - Nova Scotia
One Tree Island Reef. Now this is a spot we absolutely love, largely because it feels genuinely remote. You’re out in the Coral Sea here, and it’s got that wild, untamed feel that some of the closer-to-shore sites just can’t replicate. We’ve had days here where the visibility stretches so far it almost feels like flying. It’s a great spot for just drifting along a reef wall, keeping an eye out for some of the more unusual residents. Our favourite memory from One Tree Island was spotting a dragon wrasse, that distinctive oddball, doing its jerky movements among the staghorn coral. We also regularly see schools of triangular butterflyfish, their colours really popping against the deeper blue. Mantas are a real possibility here, too; we’ve had encounters where they just glide by, unbothered, giving you a proper look at their massive wingspan. It’s a site that rewards patience and a good eye for detail, especially among the intricate coral formations where creatures like fat-handed snapping shrimp hide. We’d suggest this one for experienced divers who appreciate solitude and aren't afraid of a bit of an open-ocean journey to get there.
- Location
- Nova Scotia, Canada, North America
- Coordinates
- 45.716840, -62.631930
- Type
- reef
Marine Protected Area: Scallop Buffer Zone (SFA 24)
Best Time to Dive in Nova Scotia
The warmest water temperatures in Nova Scotia occur in August, averaging 17.1°C. The coolest conditions are in March at 1.3°C.
Monthly Water Temperatures
- January: 3.3°C
- February: 1.6°C
- March: 1.3°C
- April: 3.0°C
- May: 6.6°C
- June: 11.0°C
- July: 15.9°C
- August: 17.1°C
- September: 16.0°C
- October: 13.9°C
- November: 10.4°C
- December: 6.5°C
Nearby Dive Sites in Nova Scotia
- Africville Park
- Anemones Alley
- Arctic Trader shipwreck (wreck)
- Avondale Reef (reef)
- BALEINE - 18m (wreck)
- Bayswater
- Big Duck Island
- Birchy Head
- Black Reef (reef)
- Black Rock Beach
- Blueberry Bay Reef (reef)
- Boutiliers Point
- Boyds Reef (reef)
- Broad Bank (reef)
- Bull Reef (reef)
Nearest Dive Centres to Macdonald Reef
Marine Life in Nova Scotia
Home to 80 recorded species including 48 reef fish, 9 sharks & rays, 5 crabs & lobsters, 5 whales & dolphins, 4 other, 2 starfish.
Notable Species
- American Lobster (Homarus americanus) - Crabs & Lobsters
- Striped Bass (Morone saxatilis) - Reef Fish
- Whiting (Merluccius bilinearis) - Reef Fish
- Split (Scomber scombrus) - Reef Fish
- Blue Shark (Prionace glauca) - Sharks & Rays
- Cape Shark (Squalus acanthias) - Sharks & Rays
- saithe (Pollachius virens) - Reef Fish
- American eel (Anguilla rostrata) - Reef Fish
- Protestant (Clupea harengus) - Reef Fish
- Atlantic cod (Gadus morhua) - Reef Fish
- Haddock (Melanogrammus aeglefinus) - Reef Fish
- Alewife (Alosa pseudoharengus) - Reef Fish
- long rough dab (Hippoglossoides platessoides) - Reef Fish
- salmon (Salmo salar) - Reef Fish
- Acadian Whitefish (Coregonus huntsmani) - Reef Fish
- witch (Glyptocephalus cynoglossus) - Reef Fish
- porbeagle (Lamna nasus) - Sharks & Rays
- Starry Ray (Amblyraja radiata) - Sharks & Rays
- tusk (Brosme brosme) - Reef Fish
- Atlantic Tomcod (Microgadus tomcod) - Reef Fish
Recommended Packing List for Macdonald Reef
Based on average water temperature of 8.9°C, currents 2 cm/s.
- Drysuit - water at 9°C demands a drysuit with thermal undergarments
- Hood & Gloves (7mm+) - critical to prevent heat loss
- Mask - essential for every dive
- Fins
- BCD - buoyancy compensator
- Regulator - your most safety-critical piece of gear
- Dive Computer - tracks depth, time, and NDL
- Surface Marker Buoy (SMB) - essential for boat pickups
- Dive Torch - useful for crevices and colour at depth
- Underwater Camera - capture your diving memories