Ribbon Number One Reef
Why dive here
With 154+ marine species recorded in the area - including hammerhead sharks, sea turtles, tiger sharks and napoleon wrasse - Ribbon Number One Reef offers some of Great Barrier Reef's richest reef diving. Water ranges 24-30°C, warmest January, February, March.
Ribbon Number One. Now, this is a spot we’ve spent some serious time at, and for good reason. It’s not just another patch of coral; this place has a personality. We love dropping in on the northern end, where the reef edge slopes gently before plunging into deeper water. You get a real feel for the scale of the Great Barrier Reef here. Keep an eye out for the Pacific Half-and-half Chromis, those little flashes of blue and yellow are everywhere, a constant, shimmering cloud that almost tickles your mask. The corals are something else, too – big heads of Wrinkle Coral and Cauliflower Coral, and those sprawling Staghorn thickets. It feels ancient. We've often seen Black Marlin cruising the deeper edge, a dark silhouette against the blue, which is always a thrill. It's a dive that rewards slow exploration, letting the currents carry you past walls dotted with Orange-lined Triggerfish. This one really suits divers who appreciate a healthy, expansive reef system over specific megafauna encounters, though the marlin are a nice bonus. Go in the morning; the light really brings out the colours of the corals.
Safety Notes
Strong currents typical this month (avg 30 cm/s). Good buoyancy control essential.
Reviews for Ribbon Number One Reef
Conditions
Ocean conditions, forecast and tides for Ribbon Number One Reef
Ribbon Number One Reef Ocean Conditions
Monthly averages for Ribbon Number One Reef, sourced from Open-Meteo marine data + Copernicus Marine (EU) - nearest station: Open-Meteo marine grid (-15.65, 145.72) (5km away)
October Averages
Sea Temperature
26°C
80°F · Range: 24.5–29°C
Current Speed
30.07 cm/s
Direction: S (183.8°)
Chlorophyll-a
0.057 mg/m³
Very clear (oligotrophic)
Salinity
35.08 PSU
Based on 4 years of monitoring data · Data sources: Open-Meteo marine data + Copernicus Marine (EU)
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