About this spot
Outer Mulberry sits off Pagham Harbour in West Sussex, England, centered on the Phoenix Caisson—a concrete structure that has become an artificial reef. The site attracts divers interested in wreck exploration and the marine ecosystem that has colonized this man-made environment. The caisson structure provides interesting contours and crevices for exploration, making it a notable destination for UK divers seeking something beyond natural formations. The spot is accessible year-round, giving divers flexibility in planning trips to the area. Community members have documented 12 species observations at the site, indicating a healthy and diverse marine population. Video documentation from three community dives provides visual reference for what to expect underwater, helping divers prepare for the conditions and features they'll encounter. Outer Mulberry operates outside a Marine Protected Area, which affects local regulations and access. The site appeals to divers with interest in artificial reefs, industrial heritage structures, and UK marine biology. Its proximity to the Sussex coast makes it accessible for regional dive operations. The documented community activity suggests an active local diving community familiar with the site's characteristics and conditions.
📖 Guide: Diving in the United Kingdom: 57 Sites From Wrecks to Seals
Dive types
Trip essentials
Everything you need before you pack — checklist, sun, logistics.
Trip checklist
- 🛂 Visa-free or visa-on-arrival
- 📜 C-card + dive insurance (DAN)
- 📔 Dive logbook
- 🧴 Reef-safe sunscreen SPF 50+
- 🔌 Plug type G · 230V adapter
- 💊 Seasickness meds + ear drops
- 📱 Offline maps + emergency contact
Quick facts
- 🌓 Moon First quarter · 47%
- GPS
› Sustainability disclosures
FAQ
›When is the best time to dive Outer Mulberry?
Outer Mulberry is dived year-round, so you can plan trips based on your schedule and local weather conditions rather than seasonal restrictions. Check with local dive operators for current sea state and visibility forecasts before heading out.
›What's the marine life like at Outer Mulberry?
The site has 12 documented species observations, showing good biodiversity. The Phoenix Caisson structure supports marine growth and attracts fish and invertebrates. Community videos offer direct visuals of the life present at the site.
›How do I access Outer Mulberry?
Outer Mulberry is accessed from Pagham Harbour, West Sussex. It's not within a Marine Protected Area, so standard diving regulations apply. Contact local UK dive operators in the area for boat access and current conditions.
›What's the main feature at Outer Mulberry?
The Phoenix Caisson, a concrete artificial reef structure, is the central attraction. It provides wreck-style diving in a UK location with interesting geology for exploration and marine life habitat.
