The Headline Seasons
Puffin Island off the Anglesey coast — Wikimedia Commons, CC BY-SA 2.0
April to mid-July is puffin season on the island cruises — combine late spring light, seabirds at full volume and pre-holiday crowd levels, and May and June are arguably the perfect months. Late July–early August brings regatta fortnight (27 July–8 August in 2026): the town at its liveliest and most expensive — glorious if you book far ahead, avoidable if you want quiet.
Shoulder & Winter
Swans on the moat at Beaumaris Castle — Wikimedia Commons, CC BY-SA 2.0
September keeps boat trips running (seals stay all year), water warm enough for the brave and school-holiday crowds gone — the connoisseur’s month. October to March the town turns local: the castle open (reduced hours), storm light on the strait, log fires in the old inns, and accommodation at its softest prices. The mountains across the water wear snow — the view from the Green is arguably better in January than July.
Practical Calendar
Boat trips run roughly late March to early November. Cadw’s castle events cluster in school holidays. The Gaol and Courthouse reopening after refurbishment is worth checking whenever you come. Food festival dates move — check locally. And whatever the month: book accommodation early for weekends; the town is small and the best beds go first.
Month by Month, Briefly
January–February: storm light, empty paths, snow on the peaks. March: boats return late in the month. April–May: puffins arrive, gardens wake, prices still kind. June: longest days, strait full of evening sails. July–August: peak everything — regatta, crowds, prices; book far ahead. September: the insiders’ month. October: last boats, first fires in the pubs. November–December: the town to yourself, Christmas lights on Castle Street, and the castle brooding handsomely in the murk. There is no bad month — only different Beaumarises.
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