HMS Grenade
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 Grenade offers some of Cornwall & Devon's richest wreck diving. Water ranges 10-18°C, warmest July, August, September.
The HMS Grenade is one of those wrecks that really sticks with you. Dropping onto her deck, you immediately get a sense of her scale, even though she’s broken in places. We love how the hull is often draped in kelp, swaying gently in the current, almost like a living camouflage. You’ll spend most of your dive picking through her structure, finning past twisted metal and exposed compartments that hint at her wartime service. Look closely, and you’ll spot plumose anemones clinging to every surface, along with squat lobsters peeking out from behind the plates. Our favourite part is often the stern, where you can sometimes glimpse conger eels lurking in the deeper, darker sections. This isn't a site for beginners; the currents can be strong, and the depth means you need to be comfortable with a bit of a push. But for experienced wreck divers, the Grenade offers a genuinely rewarding dive, full of atmosphere and history.
Safety Notes
Wreck site - avoid penetration without wreck diving certification. Watch for sharp metal and entanglement hazards.
Reviews for HMS Grenade
Conditions
Ocean conditions, forecast and tides for HMS Grenade
HMS Grenade Ocean Conditions
Monthly averages for HMS Grenade, 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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