Segontuim
Protected Area
Aberffraw Bay
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) - Segontuim offers some of Cornwall & Devon's richest diving. Water ranges 10-18°C, warmest July, August, September.
The Segontium is a wreck site off the coast of Cornwall, a popular spot for divers keen on maritime history. We’ve found it sits around 20-30 meters, making it suitable for advanced open water divers comfortable with potential currents. Expect to see substantial sections of the cargo ship, now home to spider crabs and dogfish. Visibility here can be temperamental, but on a good day, it’s a rewarding dive for wreck enthusiasts.
Typical Segontuim Dive Profile
Illustrative profile based on site depth and type. Actual dive profiles vary - always follow your dive computer and training.
Reviews for Segontuim
Conditions
Ocean conditions, forecast and tides for Segontuim
Segontuim Ocean Conditions
Monthly averages for Segontuim, 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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