Martinstown Cross, Ireland offers 1 beach perfect for sunbathing, surfing, swimming, and more. Martinstown Cross is known for its proximity to the Curragh Racecourse and the Irish National Stud. The best time to travel to Martinstown Cross, Ireland, is from May to September, with average air temperatures ranging from 50-65°F (10-18°C) and water temperatures around 55-60°F (13-16°C). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!