Mercurius
Protected Area
Área De Relevante Interesse Ecológico Orla Marítima
Why dive here
With 44+ marine species recorded in the area - including sea turtles - Mercurius offers some of Fernando de Noronha's richest reef diving. Water ranges 27-29°C, warmest March, April, May.
We love Mercurius for the sheer sense of immersion it offers. This tugboat, sunk deliberately alongside Saveiros and Taurus, rests upright at 28 metres, remarkably intact. You can duck into the control room, peer down at the propeller, and even fin your way into the engine room. It’s a proper exploration, not just a fly-by. Inside the wreck, the light filters in, illuminating schooling grunts and squirrelfish, while out on the deck, we often see thick schools of jacks swirling, sometimes so dense they momentarily block the sun. Look closely and you'll spot orangespotted filefish picking their way across the superstructure, and we’ve had some cracking encounters with great barracudas hanging motionless in the blue. Keep an eye on the sand around the wreck too, as nurse sharks often snooze there. Visibility averages a clear 21 metres, making this an ideal site for those comfortable with wreck penetration and who appreciate a wreck teeming with life.
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Conditions
Ocean conditions, forecast and tides for Mercurius
Mercurius Ocean Conditions
Monthly averages for Mercurius, sourced from Open-Meteo marine data + Copernicus Marine (EU) - nearest station: Open-Meteo marine grid (-3.84, -32.38) (0km away)
October Averages
Sea Temperature
27°C
81°F · Range: 26.5–27.9°C
Current Speed
29.15 cm/s
Direction: NW (329°)
Chlorophyll-a
0.035 mg/m³
Very clear (oligotrophic)
Salinity
36.39 PSU
Based on 4 years of monitoring data · Data sources: Open-Meteo marine data + Copernicus Marine (EU)
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