Anglesey Island

Welsh island with rugged coastline and coastal villages

Anglesey off north-west Wales provides coastal walking, prehistoric sites and Beaumaris Castle; the island links to the mainland by the Menai Strait bridges and regular ferry and road routes.

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Anglesey at a Glance#

About Anglesey#

Anglesey (Ynys Môn) is an island off the northwest coast of Wales, separated from the mainland by the Menai Strait. It is the largest Welsh island and combines coastal lowlands, beaches and inland agricultural areas with a network of small towns and villages.

Visitors come for seaside resorts, coastal walks and a concentration of historic sites - from Neolithic tombs such as Bryn Celli Ddu to medieval and early modern fortifications like Beaumaris Castle. The island also provides ferry connections to Ireland from Holyhead.

Historically the island was an important center in prehistory and early medieval Wales; it later became integrated into the English and then British administrative systems. The Menai Suspension Bridge, completed in 1826, was a key 19th-century transport link that opened the island to greater commerce and travel.

Located off the coast of northwest Wales, Anglesey lies within sight of the mainland across the Menai Strait and is accessible by road and rail bridges that link it to the town of Bangor and the Welsh road network.

  • Bridge connections: Connected to mainland Wales by the Menai Suspension Bridge (opened 1826) and the later Britannia Bridge, providing road and rail access.
  • Ferry links: Hosts the principal port for ferries to Ireland, making it an important transport hub for cross-channel travel and freight.

What to See#

  • Beaumaris Castle: A medieval concentric castle built for Edward I’s campaigns in Wales, dating from the late 13th century and known for its unfinished concentric defenses.
  • Holyhead Port: The island’s main ferry port connecting Wales with Ireland, serving freight and passenger routes and providing the primary transport link for longer-distance travel.
  • Menai Strait: A narrow stretch of tidal water separating the island from mainland Anglesey, spanned by historic bridges and offering scenic views of the strait.
  • Menai Suspension Bridge: A 19th-century suspension bridge completed in 1826 that links the island to the mainland and was an early engineering landmark in Britain.
  • Bryn Celli Ddu: A small prehistoric passage tomb that is one of several Neolithic sites on the island, representing the island’s ancient ritual landscape.

How to Get to Anglesey#

Anglesey is reached by road via the A55 toward Holyhead; the A5 and A483 also approach from North Wales. Holyhead has a ferry port with sailings to Dublin; the island is served by trains on the North Wales Coast Line with stops at Holyhead and Bangor (on the mainland), connected by the Britannia Bridge.

Tips for Visiting Anglesey#

  • Take Anglesey's coastal path in stages-the 200 km path encircles the island and reveals small beaches and hidden holy wells.
  • Visit Beaumaris Castle (late afternoon) when the low sun slants across the masonry-its concentric design is unusual among Edwardian fortifications.
  • If using public transport, plan around the Arriva North Wales buses; some rural stops are infrequent on Sundays.

Best Time to Visit Anglesey#

Best late spring through early autumn for walking and milder weather.

Summer
June-August · 12-19°C (54-66°F)
Best weather for coastal walks, boat trips and beach days; busiest with domestic tourists.
Spring/Autumn
April-May, September-October · 8-15°C (46-59°F)
Quieter, with good birdwatching and flowering hedgerows; occasional rain.
Winter
November-March · 3-10°C (37-50°F)
Windy and wet at times; dramatic storms and quiet seaside towns.

Weather & Climate near Anglesey#

Climate

Anglesey's climate is classified as Oceanic - Oceanic climate with mild summers (peaking in July) and cold winters (coldest in February). Temperatures range from 2°C to 19°C. Moderate rainfall (945 mm/year).

Air Quality: AQI 29 Good
Best Time to Visit
JuneJulyAugust
Temperature & Rainfall
Temperature Range
25°
Warmest Month
-2°
Coldest Month
Monthly Conditions
Month Comfort Temp Feels Rain Sky Humidity Wind UV Daylight
January Poor 3° - 8° 1° 92 mm overcast 85% 6.1 m/s 0.0 low 7.9h
February Poor 3° - 8° 1° 68 mm overcast 86% 5.8 m/s 0.1 low 9.6h
March Acceptable 4° - 10° 3° 80 mm overcast 86% 5.5 m/s 0.4 low 11.7h
April Acceptable 5° - 12° 6° 58 mm overcast 84% 4.6 m/s 0.8 moderate 13.8h
May Acceptable 7° - 15° 11° 50 mm overcast 84% 4.6 m/s 1.2 high 15.7h
June Good 10° - 17° 14° 56 mm overcast 85% 4.3 m/s 1.4 high 16.7h
July Good 12° - 19° 16° 60 mm overcast 86% 4.2 m/s 1.3 high 16.2h
August Good 12° - 19° 16° 76 mm overcast 85% 4.1 m/s 1.0 high 14.6h
September Good 10° - 17° 14° 84 mm overcast 84% 4.6 m/s 0.6 moderate 12.5h
October Acceptable 8° - 14° 11° 103 mm overcast 84% 5.4 m/s 0.3 low 10.4h
November Poor 6° - 11° 5° 115 mm overcast 84% 5.4 m/s 0.1 low 8.4h
December Poor 4° - 9° 3° 103 mm overcast 85% 5.8 m/s 0.0 low 7.3h