The main season in Criccieth runs from April to September, with July being the warmest month. July and August see the most visitors. If you’re here for hiking, April and May can be best, as this is before summer crowds arrive. Meanwhile, the surfing season runs from November through April. The Criccieth Festival, a long-established extravaganza of music, dance, and lectures, takes place each June as the liveliest time in Criccieth itself.