Satellite: Sentinel-2 cloudless 2016 by EOX (CC BY 4.0). Outline and points © OpenStreetMap contributors / Natural Earth. North up.
In numbers
677km²
Area
231km
Coastline
166m
Highest point
70,043
People
16°C
Warmest sea
August
402km
To the mainland
When to go to Anglesey
Good all year round.
The sea is warmest in August (16 °C) and coolest in March (8 °C). The water never reaches 21 °C: bring a wetsuit.
Averages 1991–2020. Sea: NOAA OISST, the water within 35 km of the coast. Air, rain and sun: NASA POWER. Best months weigh warm afternoons (23–30 °C), sea of 24 °C or more and few wet days.
Island in north-west Wales, UK
Anglesey is an island in United Kingdom. It covers 677 km², with 231 km of coastline. Its highest point rises to 166 m. About 70,043 people live on it. The nearest mainland is 402 km away.
Getting there
- Isle of Man Airport (IOM)nearest airport with scheduled flights · 89 km in a straight lineCar hire at LPL airport (Liverpool)Discover Cars · Affiliate link↗
- 402 km from the mainlanddistance to the nearest continental coast
Plan the trip
Ferries, stays and things to do
Some links above are affiliate links: if you book through them we may earn a commission, at no extra cost to you. It never changes what the data on this page says.
On the island
What you find on Anglesey.
- 90beachesPorth Dre-fadog, Porth Trwyn, Porth y Cychod and 87 more
- 8viewpointsParys Mountain View and 7 more
- 1lighthousesAmlwch Lighthouse
- 1marinasNorth West Venturers Yacht Club
- 10named peaksMynydd Bodafon, Mynydd Eilian, Mynydd y Garn and 7 more
- 1waterfalls
- 7castles and fortsCastell Aberlleiniog, Beaumaris Castle, Dinas and 4 more
- 205ruins and archaeological sitesLlugwy Chambered Tomb, Penmon Priory, Baron Hill Gatehouse and 202 more
- 6waymarked walking routesIsle of Anglesey Coastal Path, Hidden Corners of Plas Newydd, Plas Newydd, A Gentle Walk at Plas Newydd, Plas Newydd and 3 more
- 118campsitesLlyn Y Gors, Kingsbridge Caravan & Camping Park, Gadlys Coastal Holiday Cottages and 115 more
- 174hotels, guesthouses and apartments
- 95restaurants, cafés and bars
Counted in OpenStreetMap, the map anyone can edit, inside the island's outline. A low number may only mean nobody has mapped it yet.
Cross-checked with our atlases
Anglesey in our other atlases
Everything Coastya, Peakyas, Lakeyas and Cascadyas know about what lies inside Anglesey, each with its own numbers.
3beaches and covesCoastya
8lakesLakeyas
Largest lake
2.4km²
Llyn Alaw
according to Lakeyas
Warmest lake
20.3°C
Llyn Cerrig Bach
surface water, warmest month · according to Lakeyas
Beach with the warmest sea
15.6°C
Traeth Lligwy
sea in the warmest month · according to Coastya
3 beaches
on Coastya, the beach atlas
- Traeth Lligwy15.6°C
- Porth Tre-castellcove15.2°C
- Porth Trwyncove15.0°C
8 lakes
on Lakeyas, the lake atlas
- Llyn Alaw2.4km²
- Llyn Cefni0.53km²
- Llyn Traffwll0.30km²
- Llyn Coron0.24km²
- Llyn Llywenan0.20km²
- Llyn Maelog0.20km²
- Llyn Cerrig Bach0.15km²
- Cemlyn Bay and lagoon0.11km²
Lakeyas is coming soonOpen Lakeyas ↗
The shape of the land.
On average the island stands 46 m above the sea. 100 % of it is below 200 m.
- 57 %0–50 m
- 43 %50–200 m
Share of the island's area in each altitude band, from the Copernicus DEM (30 m, read at 30–240 m on large islands).
Size, for real
Next to islands you may know.
20 km
All outlines drawn to the same scale (Natural Earth and OpenStreetMap).
Towns on the island
- Llangefni4,864 people
- Menai Bridge3,376 people
- Amlwch3,211 people
- Llanfairpwllgwyngyll2,900 people
- Valley2,361 people
- Benllech2,236 people
- Gaerwen1,551 people
- Cemaes Bay1,187 people
- Llanerchymedd1,133 people
- Beaumaris1,121 people
- Bodedern1,051 people
- Rhosneigr1,008 people
Month by month
The weather on the island.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Afternoon high (°C) | 8 | 8 | 8 | 10 | 12 | 15 | 16 | 17 | 16 | 14 | 11 | 9 |
| Night low (°C) | 6 | 5 | 6 | 7 | 10 | 12 | 14 | 14 | 13 | 12 | 9 | 7 |
| Sea (°C) | 9 | 8 | 8 | 9 | 10 | 13 | 14 | 16 | 15 | 14 | 12 | 10 |
| Rain (mm) | 108 | 89 | 81 | 63 | 65 | 72 | 79 | 94 | 92 | 122 | 127 | 131 |
| Wet days | 18 | 15 | 15 | 13 | 12 | 13 | 15 | 17 | 15 | 18 | 20 | 19 |
| Sun h/day | 1.2 | 2.6 | 4.5 | 6.4 | 7.7 | 7.6 | 6.8 | 6.0 | 4.9 | 2.9 | 1.5 | 0.8 |
| Wind (km/h) | 33 | 30 | 27 | 23 | 23 | 20 | 21 | 23 | 25 | 29 | 31 | 32 |
Averages 1991–2020 for the ~55 km NASA POWER cell over the island; the sea from NOAA OISST.
Recent years
Warmer and cooler years at sea.
Each month's sea temperature compared with its 1991–2020 average, in degrees.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2020 | +0.1 | +0.4 | +0.4 | +0.5 | +0.7 | +0.4 | +0.1 | +0.3 | +0.3 | ±0.0 | +0.3 | +0.5 |
| 2021 | +0.5 | +0.4 | +0.5 | +0.1 | −0.2 | +0.3 | +1.1 | +0.3 | +1.0 | +0.9 | +0.8 | +0.2 |
| 2022 | +0.6 | +0.8 | +1.1 | +1.1 | +1.3 | +0.6 | +0.8 | +1.0 | +1.1 | +0.5 | +1.1 | +0.7 |
| 2023 | +1.0 | +0.8 | +0.8 | +0.8 | +1.5 | +1.5 | +1.1 | +0.8 | +1.5 | +1.0 | +0.7 | +0.6 |
| 2024 | +0.8 | +1.1 | +1.3 | +1.4 | +1.4 | +0.6 | +0.4 | +0.3 | ±0.0 | +0.2 | +0.3 | −0.2 |
| 2025 | +0.2 | +0.1 | +1.0 | +1.3 | +1.7 | +1.4 | +1.3 | +1.0 | +0.5 | +0.4 | +0.3 | +0.2 |
+1 warmer than usual −1 cooler than usual
Photos
Seen by visitors.
Nearby
More islands nearby.
Holy Island
United Kingdom35 km²220 m16 km away
Isle of Man
Isle of Man568 km²608 m107 km away
Great BritainUnited Kingdom228,938 km²1,344 m143 km away
Bardsey IslandUnited Kingdom1.8 km²163 m66 km away
Calf of ManIsle of Man2.5 km²123 m89 km away
Ireland
Ireland84,421 km²1,039 m235 km awaySt Patrick's IsleIsle of Man0.05 km²106 m106 km awayBarry IslandUnited Kingdom41 m224 km awayAbout these numbers
| Names, area, population | Wikidata (Q168159) · CC0 |
|---|---|
| Outline | © OpenStreetMap contributors · ODbL |
| Sea temperature | NOAA OISST v2.1 · 1991–2020 |
| Climate | NASA POWER · 1991–2020 |
| Relief, 3D model | Copernicus DEM GLO-30 · © DLR e.V., © Airbus Defence and Space GmbH, Copernicus/ESA |
| Beaches, ports, lighthouses, trails | © OpenStreetMap contributors · ODbL |
| Towns | GeoNames · CC BY 4.0 |
| Images | EOX Sentinel-2 cloudless 2016 · CC BY 4.0; Wikimedia Commons |
| Beaches, mountains, lakes and waterfalls | Coastya, Lakeyas — Wikidata · CC0; © OpenStreetMap contributors · ODbL; GeoNames · CC BY 4.0; NOAA OISST; HydroLAKES (Messager et al. 2016) · CC BY 4.0, LakeTEMP (Korver et al. 2024) · CC BY 4.0 |
Every figure is an average, an estimate or a count from a public dataset. Licences and methods: data sources.
The family
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