Like much of North Wales, Pwllheli is close enough to Snowdonia’s mountains to receive its fair share of awful weather. July and August are the warmest months; October through December is the wettest period. For campers and yachters, July brings the calmest weather of the year. Surfers will want to consider the months with big swells—November to April—although many campsites are only open in the April to September tourist season.