Skerries (Ynysoedd y Moelrhoniaid)
| Location | SH 26776 94772 / 53.4212, -4.6083 / occur.supported.segmented |
| Established / Rebuilt / Automated / Closed | 1717 / 1759, 1804, 1848 / 1987 / — |
| Architect or Builder | James Walker (alterations 1848) |
| Height of tower (m) / above sea level (m) / Range (NM) | 23 / 36 / 18 |
| Character | Fl(2) 15s |
| Optic | LED, 2025 (previously 1st order rotating catadioptric) |
| Owner | Trinity House |
Situated on a rocky islet off the coast of Anglesey, this is the most northerly lighthouse in Wales, as well as the second oldest. The original tower, topped by a coal brazier, was replaced with a new tapered tower in 1759, which has been rebuilt twice and surrounded with extra buildings for accommodation and machinery. A shorter tower was attached to the main tower around 1903 to accommodate a red sector light pointing northeast. It is still active, owned by Trinity House, and is also the site of a nature reserve hosting large nesting colonies of Arctic, Common and Roseate terns.