HMS Hermes
Protected Area
Foreland
Why dive here
With 176+ marine species recorded in the area - including blue sharks, dolphins, dwarf minke whales, humpback whales and ocean sunfish (mola mola) - HMS Hermes offers some of Cornwall & Devon's richest wreck diving. Water ranges 10-18°C, warmest July, August, September.
Diving the HMS Hermes in the cooler waters off Cornwall is a proper adventure, a real piece of history waiting to be explored. This isn’t a shallow reef bimble; it's a deep, dark dive onto a Highflyer-class cruiser that settled here in 1919 after a collision. What we love about the Hermes is its intact structure, allowing you to trace the deck plan and imagine life aboard. Descending through the green, often silty water, the sheer size starts to become apparent. The bow is particularly striking, often draped in fishing nets, home to lobster and crab tucked into every crevice. We’d suggest focusing on the midship section, where the superstructure has collapsed into fascinating rubble, creating overhangs perfect for conger eels. Visibility can swing wildly here, so pick your day carefully, ideally on a neap tide for less current. It’s a dive for those comfortable with deeper UK waters, typically hitting 40m plus, and certainly one of our favourite historical wrecks in the area.
Safety Notes
Wreck site - avoid penetration without wreck diving certification. Watch for sharp metal and entanglement hazards.
Reviews for HMS Hermes
Conditions
Ocean conditions, forecast and tides for HMS Hermes
HMS Hermes Ocean Conditions
Monthly averages for HMS Hermes, sourced from Open-Meteo marine data - nearest station: Open-Meteo marine grid (50.44, -2.73) (3km away)
October Averages
Sea Temperature
17°C
62°F · Range: 15.1–17.5°C
Air Temperature
13°C
56°F
Wind Speed
8.14 m/s
15.8 knots
Atmospheric Pressure
1011 hPa
Based on 4 years of monitoring data · Data sources: Open-Meteo marine data
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