HMSM UPSTART
Protected Area
Tennyson
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) - HMSM UPSTART offers some of Cornwall & Devon's richest wreck diving. Water ranges 10-18°C, warmest July, August, September.
The HMSM Upstart is one of those wrecks we keep coming back to. Sitting upright at 37 metres, she’s an easy dive on a calm day, though that depth means some current can really make it a workout. Built in 1942, this U-class submarine was scuttled in 1957, so she’s been down there a while and the sea has really claimed her. We love finning along her deck, spotting the periscope tubes and the outline of her conning tower. The bow torpedo tubes are a particular favourite – you can usually see conger eels peering out, their thick bodies disappearing back into the dark. Look closely for dogfish eggs tucked into crevices and always keep an eye out for curious seals. If you hit it right, with good visibility and slack water, it’s a genuinely atmospheric dive, a real window into naval history and the power of the ocean to reclaim what’s hers. This isn't a site for beginners; that depth and the potential for current mean you want to be comfortable with your diving.
Typical HMSM UPSTART Dive Profile
Illustrative profile based on site depth and type. Actual dive profiles vary - always follow your dive computer and training.
Safety Notes
Deep dive (37m) - monitor air consumption closely. Advanced certification recommended.
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.
Nearest Dive Centres to HMSM UPSTART
Dive shops near HMSM UPSTART
Divers Down
TAL Scuba Ltd.
Mayim Mermaid Academy
Dorset Diving Services
Andark Diving
In2 Diving
Reviews for HMSM UPSTART
Conditions
Ocean conditions, forecast and tides for HMSM UPSTART
HMSM UPSTART Ocean Conditions
Monthly averages for HMSM UPSTART, 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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