Sources · Destination Guide

Anglesey and North Wales

Cold-water wrecks, tidal reefs, kelp coves, and mountain horizons on the Irish Sea

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Destination Guide Sources For Anglesey and North Wales

Reference links used to build and maintain this guide.

39 sources • Updated Sep 4, 2026

Written by DiveJourney. Built from public sources and local operator knowledge. Last updated Sep 4, 2026.

PADI - Diving in Wales - Cold-water conditions, typical water-temperature range, main April to October season, year-round drysuit context, currency, and electricity basics.
Met Office - UK regional climates - Official regional climate context for the wetter and windier north-west of the UK and the relatively easier spring and summer planning window.
Deifwyr Mon Divers - Shore diving sites - Local club descriptions of Porth Dafarch, Newry Beach, Rhoscolyn, Cemaes Bay, Bull Bay, and the Menai Bridge Nature Trail, including access, shelter, tides, and marine life.
Deifwyr Mon Divers - About the club - Confirms a year-round Holyhead-based BSAC club model and the use of inland alternatives when sea conditions are unsuitable.

Research Sources

Destination Guide Sources For Anglesey and North Wales

Reference links used to build and maintain this guide.

39 sources • Updated Sep 4, 2026

Written by DiveJourney. Built from public sources and local operator knowledge. Last updated Sep 4, 2026.

PADI - Diving in Wales - Cold-water conditions, typical water-temperature range, main April to October season, year-round drysuit context, currency, and electricity basics.
Met Office - UK regional climates - Official regional climate context for the wetter and windier north-west of the UK and the relatively easier spring and summer planning window.
Deifwyr Mon Divers - Shore diving sites - Local club descriptions of Porth Dafarch, Newry Beach, Rhoscolyn, Cemaes Bay, Bull Bay, and the Menai Bridge Nature Trail, including access, shelter, tides, and marine life.
Deifwyr Mon Divers - About the club - Confirms a year-round Holyhead-based BSAC club model and the use of inland alternatives when sea conditions are unsuitable.

- Authoritative dive-planning guidance for neap tides, slack water, very strong currents, boat traffic, and the Menai Strait Nature Trail.

Flintshire Sub Aqua Club - Coastal dives - Local evidence for Anglesey and North Wales wreck, reef, shore, and boat diving, including SS Missouri, Hermine, the Fangs, and Porth Ysgaden.

Gwynedd Sub Aqua Club - Local year-round club, training, and technical-diving context for Anglesey and North Wales.

North Wales Sub Aqua Club - Local club evidence for year-round shore, boat, inland, and training activity in North Wales.

Raspberry Watersports - Dive charter - Current certified-diver charter context for the Menai Strait and Anglesey, including weather- and tide-dependent SS Missouri trips.

North Wales Wildlife Trust - Snorkelling - Local snorkeling safety, buddy guidance, late-summer comfort, habitat, and wildlife context.

Local Nature Partnerships Cymru - Snorkelling for Nature - Menai Strait Wild Swimways, guided snorkeling, lifeguard participation, wildlife surveys, and citizen-science context.

North Wales Freediving and Spearfishing School - Local freediving instruction and safety-training evidence; supports classifying the destination as training-led rather than a fixed-line depth hub.

National Trust - Porth Dafarch - Official coastal access, geology, snorkeling, rockpooling, wildlife, and SS Missouri context at Porth Dafarch.

JNCC - Menai Strait and Conwy Bay SAC - Official evidence for reefs, sandbanks, intertidal flats, tidal rapids, and unusually rich marine communities.

Natural Resources Wales - European marine site conservation advice - Official conservation framework for North Wales marine protected areas, including Menai Strait and Conwy Bay and Pen Llyn a'r Sarnau.

Pen Llyn a'r Sarnau - Porthdinllaen seagrass project - Local marine protected area evidence for Porthdinllaen seagrass, its ecological value, and management to reduce damage while retaining responsible access.

National Trust - Porthdinllaen - Official access and sheltered-water context for Porthdinllaen and its visible summer seagrass habitat.

Cadw - Coastal and maritime archaeology - Official Welsh heritage guidance confirming that certain activities at protected wreck sites require a Cadw licence.

GOV.UK - Wreck and salvage law - Official rules on recovered wreck material, the Receiver of Wreck, and responsible treatment of maritime heritage.

GOV.UK - Receiver of Wreck protected wrecks - Official overview of protected wreck legislation and Cadw's role for protected sites in Wales.

RNLI - How to call for help at sea - Official emergency guidance to call 999 or 112 and ask for the Coastguard, with a waterproof phone carried on the person.

BSAC - National decompression illness helpline - Current 24-hour diving-illness helpline number for England, Wales, and Northern Ireland, plus at-sea Coastguard procedure.

NHS Wales - Official Welsh health-service entry point and NHS 111 Wales context for urgent, non-life-threatening medical advice.

Betsi Cadwaladr University Health Board - Ysbyty Gwynedd - Official hospital and switchboard information for the principal acute hospital in Bangor.

Visit Wales - Things to do on Anglesey - Official destination context for the Anglesey Coast Path, Llanddwyn, South Stack, Parys Mountain, Plas Newydd, beaches, and local experiences.

RSPB - South Stack - Official reserve access and seasonal seabird context, including cliff-nesting birds in spring and early summer.

North Wales Wildlife Trust - Cemlyn Nature Reserve - Official reserve access, seasonal tern colony, and disturbance-management guidance.

Cadw - Beaumaris Castle - Official visitor and heritage context for the UNESCO-listed unfinished Edwardian fortress.

Eryri National Park - Official mountain, route-planning, access, and responsible-visitor guidance for the mainland national park.

GOV.UK - Electronic Travel Authorisation - Current official ETA eligibility, application, validity, exemptions, and fee information for travel to the UK.

Welsh Government - Check where the visitor levy applies - Current council-by-council visitor-levy status, including pending decisions in North Wales as of the research date.

Manchester Airport - Travel to North Wales - Official airport guidance for A55 road access and rail travel via Chester toward Bangor and Holyhead.

Transport for Wales - Holyhead - Official rail and integrated ferry-gateway context for Holyhead.

Visit Wales - Travelling between Wales and Ireland - Official tourism guidance for Holyhead-Dublin ferry operators and typical crossing times.

Stena Line - Holyhead to Dublin - Current crossing, booking, vehicle, and passenger-ferry context, including the announced passport-at-check-in policy effective September 28, 2026.

VisitBritain - Useful information for UK travel - Official visitor guidance on pound sterling, cash points, payments, and tipping.

Liverpool John Lennon Airport - By Rail - Official airport guidance for reaching rail services through Liverpool South Parkway and onward connections.

NHS 111 Wales - Ysbyty Gwynedd Emergency Department - Official service listing supporting the Bangor emergency-department location, contact details, and 24-hour availability.

Destination hero photo by Sam Andrews - Photographer profile: https://unsplash.com/@samandrews89