Dive-site story
NDAC, previously known as the National Diving and Activity Centre at Dayhouse Quarry, is a deep flooded limestone quarry located near Chepstow. With steep quarry walls and extensive depths, the site was developed as a premier inland training facility suited for recreational, technical, and mixed-gas divers. Submerged attractions line several distinct depth tiers, ranging from shallow platforms to deep sunken vehicles and aircraft fuselages.
Submerged Hawker Hunter jet and aircraft fuselages
Multiple training platforms suspended at staggered depths
Armored personnel carriers, buses, and sunken road vehicles
Deep clear quarry waters ideal for technical and rebreather diver training
Location
Use the map to plan with your operator and confirm the exact entry point on the day.
Seasonality
Warmer surface layers occur in summer, though deep sections remain consistently cold year-round.
Marine life
| Species | Likelihood | J | F | M | A | M | J | J | A | S | O | N | D |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rainbow troutOncorhynchus mykiss | Common | ||||||||||||
| European perchPerca fluviatilis | Seasonal | ||||||||||||
| Signal crayfishPacifastacus leniusculus | Seasonal |
Marine forecast
