Billerica, United States offers 2 beaches perfect for sunbathing, surfing, swimming, and more. Billerica is known for the historic Howe School and the Billerica State Forest. The best time to travel to Billerica, United States, is in late spring (May to early June) when the average air temperature is around 60-70°F, and water temperatures in nearby lakes are typically around 55-65°F. Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!