NDAC
Protected Area
Aust Cliff
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) - NDAC offers some of Cornwall & Devon's richest diving. Water ranges 10-18°C, warmest July, August, September.
NDAC, or the National Diving and Activity Centre, is a flooded quarry in Chepstow, not Cornwall & Devon, offering a range of attractions for divers. You'll find a submerged plane, helicopter, and even a bus, alongside training platforms. It's an inland site, so expect colder water and limited natural marine life, but it's excellent for technical training, gear testing, or simply getting time in the water when coastal diving isn't an option. We'd suggest it for divers looking to practice skills or try out new kit in a controlled environment.
Typical NDAC Dive Profile
Illustrative profile based on site depth and type. Actual dive profiles vary - always follow your dive computer and training.
Safety Notes
Depth of 20m - Advanced Open Water certification recommended.
Always perform a 3-minute safety stop at 5m before surfacing.
Nearest Dive Centres to NDAC
Dive shops near NDAC
The Lake
Extreme Marine
InDepth
Welsh Diving
Dive 90
Vobster Quay Dive Shop
Reviews for NDAC
Conditions
Ocean conditions, forecast and tides for NDAC
NDAC Ocean Conditions
Monthly averages for NDAC, 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
Plan & book
Ways to dive Cornwall & Devon, from day trips to liveaboards.
Day trips & courses
via GetYourGuideGuided dives, courses and snorkel trips with instant booking.
Find dive trips in Cornwall & DevonPlaces to stay
via Booking.comHotels and dive resorts near Cornwall & Devon.
Search stays in Cornwall & DevonDive insurance
Most travel insurance excludes or limits scuba. Check what you need before you go.
Dive insurance explainedPartner links: we may earn a commission if you book, at no extra cost to you. How we make money
Where to Stay near NDAC
Prices from Booking.com. We may earn a commission at no extra cost to you.