North Stack Island
Sea stack off Anglesey popular with climbers
Off Anglesey's Holyhead coast, North Stack is a sea-stack and cliff area favoured by experienced rock climbers, birdwatchers and coastal walkers exploring tidal platforms and geological strata.
North Stack at a Glance#
How to Get to North Stack#
North Stack (Ynys Arw) is accessed from Holyhead or the northwest coast of Anglesey. Visitors typically drive along the A55 to the town of Holyhead and follow local roads toward North Stack viewpoints and car parks; coastal footpaths lead to cliff edges and lookout points. Check tide times and local access signs before attempting coastal walks.
Tips for Visiting North Stack#
- Approach the stack by low tide if attempting coastal walks; routes can be slippery and tide-dependent.
- Rock climbers should check local access rules and sea conditions - North Stack is serious and exposed, not for the inexperienced.
- Bring binoculars for seabird colonies on the cliff faces - puffins and razorbills nest on nearby ledges in season.
Best Time to Visit North Stack#
Best in late spring and summer for milder weather and active seabird colonies, though conditions can change rapidly.
Weather & Climate near North Stack#
Continental climate with mild summers (peaking in August) and cold winters (coldest in February). Temperatures range from 3°C to 18°C. Moderate rainfall (909 mm/year).
| Month | Comfort | Temp | Feels | Rain | Sky | Humidity | Wind | UV | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | Poor | 3° - 8° | 1° | 93 mm | overcast | 85% | 8.2 m/s | 0.0 low | 7.9h |
| February | Poor | 3° - 8° | 1° | 68 mm | overcast | 86% | 7.6 m/s | 0.1 low | 9.6h |
| March | Acceptable | 4° - 9° | 2° | 70 mm | overcast | 86% | 7.1 m/s | 0.4 low | 11.7h |
| April | Acceptable | 5° - 11° | 5° | 57 mm | overcast | 84% | 5.9 m/s | 0.8 moderate | 13.8h |
| May | Acceptable | 7° - 14° | 11° | 50 mm | overcast | 84% | 5.6 m/s | 1.2 high | 15.7h |
| June | Good | 10° - 16° | 13° | 57 mm | overcast | 85% | 5.2 m/s | 1.4 high | 16.7h |
| July | Good | 12° - 18° | 15° | 56 mm | overcast | 86% | 5.1 m/s | 1.3 high | 16.2h |
| August | Good | 12° - 18° | 15° | 73 mm | overcast | 85% | 5.2 m/s | 1.0 high | 14.6h |
| September | Good | 11° - 16° | 13° | 80 mm | overcast | 84% | 6.0 m/s | 0.6 moderate | 12.5h |
| October | Acceptable | 8° - 13° | 11° | 97 mm | overcast | 84% | 7.1 m/s | 0.3 low | 10.4h |
| November | Poor | 6° - 10° | 4° | 107 mm | overcast | 84% | 7.4 m/s | 0.1 low | 8.4h |
| December | Poor | 4° - 8° | 2° | 101 mm | overcast | 85% | 7.9 m/s | 0.0 low | 7.3h |
