USS Illinois
Protected Area
West of Wight-Barfleur
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) - USS Illinois offers some of Cornwall & Devon's richest wreck diving. Water ranges 10-18°C, warmest July, August, September.
The USS Illinois isn't just a hunk of metal; it’s a portal to maritime history, sitting off the coast of Cornwall. We love how the wreck, originally a French battleship then seized by the US, tells a story of shifting naval power, now gently succumbing to the currents and the sea life. You descend into the often green, moody waters and the wreck slowly materialises, its size impressive. What makes it special? For us, it’s the sense of scale and the way the superstructure has collapsed, creating swim-throughs that are just begging to be explored. Inside, we’ve found conger eels coiled in the shadows, their eyes tracking your light, and a surprising number of wrasse darting between twisted girders. Visibility can vary wildly here; we’d suggest aiming for slack tide on a neap to get the best views and avoid battling the surge. It’s a site for those who appreciate wrecks with a bit of mystery and enjoy a dive where you can truly feel the weight of history around you.
Safety Notes
Wreck site - avoid penetration without wreck diving certification. Watch for sharp metal and entanglement hazards.
Reviews for USS Illinois
Conditions
Ocean conditions, forecast and tides for USS Illinois
USS Illinois Ocean Conditions
Monthly averages for USS Illinois, 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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