SLEMISH
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) - SLEMISH offers some of Cornwall & Devon's richest wreck diving. Water ranges 10-18°C, warmest July, August, September.
The Slemish, a steamship sunk by a U-boat in 1944, lies upright at 54 metres. She’s a decent sized wreck, 76 metres long, and still holds her shape well despite the years. We’ve found her to be a good technical dive, a chance to explore a proper wreck without the strong currents that sometimes plague other sites in the area. Look for the triple expansion engine, a great focal point, and the usual suspects like conger eels tucked into nooks. The visibility can vary, as with most UK diving, but on a good day, the Slemish offers a rewarding trip for experienced wreck divers.
Typical SLEMISH Dive Profile
Illustrative profile based on site depth and type. Actual dive profiles vary - always follow your dive computer and training.
Safety Notes
Maximum depth 54m exceeds recreational limits (40m). Technical diving certification and equipment required.
Wreck site - avoid penetration without wreck diving certification. Watch for sharp metal and entanglement hazards.
Always perform a 3-minute safety stop at 5m before surfacing.
Reviews for SLEMISH
Conditions
Ocean conditions, forecast and tides for SLEMISH
SLEMISH Ocean Conditions
Monthly averages for SLEMISH, 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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