 The city 's largest festival , the Neptune Festival , attracts 500 @,@ 000 visitors to the oceanfront and 350 @,@ 000 visitors to the air show at NAS Oceana . Celebrating the city 's heritage link with Norway , events are held in September in the oceanfront and Town Center areas . Every August , the American Music Festival provides festival attendees with live music performed on stages all over the oceanfront , including the beach on Fifth Street . The festival ends with the Rock ' n ' Roll Half Marathon . 
