Wreck of Grace Dieu
Protected Area
Hackett's Marsh
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) - Wreck of Grace Dieu offers some of Cornwall & Devon's richest wreck diving. Water ranges 10-18°C, warmest July, August, September.
The *Grace Dieu* isn't your typical metal hulk, and that's precisely why we love it. This isn't a dive where you're penetrating cabins; it's an archaeological journey back to 1418, an English warship lost to fire in 1439. What you find here are the preserved timbers, a remarkable testament to early shipbuilding. We’re talking about huge, dark wooden ribs emerging from the seabed, often draped in kelp, giving the whole site an almost organic feel. Visibility can be a Cornish lottery, but on a good day, the scale of these timbers is impressive, creating shadowy canyons where conger eels lurk, and schools of pilchard dart past. Look closely among the wreckage; you’ll spot native oysters, beadlet anemones, and plenty of dogfish snuffling around for an easy meal. This dive suits those who appreciate history as much as marine life, divers who enjoy a more contemplative experience rather than high-speed drifts. We'd suggest timing your dive for slack water to really take your time exploring the details. It's a genuinely unique site.
Safety Notes
Wreck site - avoid penetration without wreck diving certification. Watch for sharp metal and entanglement hazards.
Nearest Dive Centres to Wreck of Grace Dieu
Dive shops near Wreck of Grace Dieu
Andark Diving
In2 Diving
Sunken Dreams Scuba Diving Academy
TAL Scuba Ltd.
Sussex Diving & Leisure
Mulberry Marine Experiences CIC
Reviews for Wreck of Grace Dieu
Conditions
Ocean conditions, forecast and tides for Wreck of Grace Dieu
Wreck of Grace Dieu Ocean Conditions
Monthly averages for Wreck of Grace Dieu, 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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