You can tell it's Fleet Week by the Navy vessel docked on the waterfront and members of the United States Armed Services are proudly wearing their uniforms. But this is just one of several major events in the city.
This weekend thousands of people will also gather at Golden Gate Park for the Hardly Strictly Bluegrass concert and there is, even more, going on.
"60,000 people at Oracle Open World--major concert at AT&T Park," says San Francisco Mayor Ed Lee.
"We're accustomed to dealing with big weekends with multiple events. So for San Francisco Police officers no discretionary time off is allowed. So every officer that is available will be working," says San Francisco Police Sgt. Michael Andraychak.
Fleet Week and both concerts will take place in outdoor venues. Just like the country music event Sunday night in Vegas. That tragic and deadly event has officers pulling out all stops. As the department will have extra eyes and ears on the streets.
"We're going to have a lot of visible police officers out there. They'll be on foot on motorcycle on bicycle police cars and some officers on horseback," says Andraychak.
They'll also have help from outside state and federal agencies. "All of our law enforcement agencies and the state as well as any feds who might come in because these large events are happening any intel they have they're sharing with us," says Lee.
"I don't think I'm worried about anything in particular but I don't particularly partake in those events because I've lived here for a while," says Mariana Pristupa of San Francisco.
"Nobody's really safe its always something happening. If it doesn't happen in Vegas, it's happening everywhere," says Hettie Aponte of San Francisco
To put some at ease the mayor says extra private security will be provided by organizers at the concerts. With some of the events being held in areas where high-rise buildings are nearby.
San Francisco police are looking to the public as another source to keep people safe. "With the 1000's and 1000's of people coming to San Francisco there are extra eyes and ears and we want folks to remember that if you see something out of place and if you see someone acting suspiciously call 911," says Andraychak.