Eniwetak, Marshall Islands offers 2 beaches perfect for sunbathing, surfing, swimming, and more. Eniwetak, Rongerik Atoll, Marshall Islands, is known for its historical significance as a former nuclear testing site and its stunning coral reefs. The best time to travel to Eniwetak, Marshall Islands, is from May to October, with average air temperatures around 82°F (28°C) and water temperatures near 84°F (29°C). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!