HMS Isis
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 Isis offers some of Cornwall & Devon's richest wreck diving. Water ranges 10-18°C, warmest July, August, September.
The HMS Isis, an I-class destroyer sunk in 1944, gives you a proper slice of wartime history off the Lizard. This isn't one of those wrecks that's just a pile of plates. She's broken, of course, but there's enough structure left to make a dive feel like an exploration. We love dropping down onto her main deck, often finding a big conger eel peering out from beneath a twisted bulkhead. The bow section is particularly engaging, with some of the torpedo tubes still identifiable, encrusted now with dead man's fingers coral and hydroids that sway in the gentle surge. Visibility here can be typical for the Channel, sometimes 5 metres, sometimes 15, so pick your day. Slack water is key for a relaxed rummage around her holds, which are now home to spider crabs and blennies. It’s a dive for those who appreciate the story behind the metal and don't mind a bit of a current if the rewards are there. We'd suggest a good dive light to really pick out the details in the darker recesses and to spot the jewel anemones that cling to the deeper sections.
Safety Notes
Wreck site - avoid penetration without wreck diving certification. Watch for sharp metal and entanglement hazards.
Reviews for HMS Isis
Conditions
Ocean conditions, forecast and tides for HMS Isis
HMS Isis Ocean Conditions
Monthly averages for HMS Isis, 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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