Photos & Guide by Stefano Ferrier - Wedding Photographer in Ireland All photos by: Stefano Ferrier If you're planning a wedding in Ireland, the best months are generally May to September, when the days are longer and there is a better chance of mild weather. However, there is no single perfect month: June offers some of the longest days of the year, July and August are popular for summer weddings, while September can provide beautiful softer light and a quieter atmosphere.