Eufaula, United States offers 2 beaches perfect for sunbathing, surfing, swimming, and more. Eufaula, Oklahoma, United States, is known for Lake Eufaula, which is the largest lake in the state and a popular destination for fishing, boating, and outdoor recreation. The best time to travel to Eufaula, United States, is in late spring (May), when the average air temperature is around 75°F (24°C) and the water temperature is approximately 70°F (21°C). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!