The Port of San Diego has unveiled the start time for Big Bay Boom, said to be the largest Fourth of July fireworks show on the West Coast. 

At 9:15 p.m. on Independence Day, July 4, 2026, fireworks will launch simultaneously from four barges across San Diego Bay, creating a display of color and light synced to a musical simulcast. 

“The Port of San Diego Big Bay Boom is our region’s signature and most anticipated annual Independence Day tradition, and we’re eager to put on a great event as we celebrate our nation’s 250th anniversary,” said Chair Ann Moore, Port of San Diego Board of Port Commissioners.  

“Gather your friends and family, grab a comfy lawn chair, and join us for an incredible evening on San Diego Bay.” 

As previously reported, Carnival Cruise Line will be this year’s official cruise line sponsor.  

Guests sailing on the Carnival Radiance, Carnival Firenze and Carnival Luminosa over the holiday will be able to watch the fireworks show as the ships will be anchored near San Diego Bay.