VIDEO: 100 scary seconds: What it's like to wipe out on a 50 foot wave at Mavericks in Half Moon Bay
The National Weather Service says dangerous waves are expected to reach 25-40 feet high through the day. Breakers may occasionally exceed 50 feet at some spots along the coast, according to officials.
In Pacifica, people gathered on the Pacifica Pier to get a closer look.
VIDEO: Surfers catch big waves at Mavericks in Half Moon Bay
"I came out. I love to see the waves. It's neat," said Michael Lucero.
Dozens and dozens of people still walked along Beach Boulevard in Pacifica even though it was closed to traffic.
RELATED: A 1st at Mavericks in Half Moon Bay: Women will compete in legendary surf contest
A wave broke a window at the Moonraker Restaurant at Rockaway Beach.
Window broken by wave at Moonraker restaurant in Rockaway Beach. pic.twitter.com/jtx4Y6JyjA— Matt Keller (@MattKellerABC7) December 17, 2018
Some people tried to get a view of the waves without getting wet.
"It's great. It's fantastic. It's like I'm a little kid again. This is really good," said Daly City resident Ashish Singh.
RELATED: Mavericks surf contest postponed until further notice
Beach Boulevard will need a big cleanup of all the sand and rocks after the waves go down because the debris causes drainage issues.
See more photos, stories and videos on the weather.
Download: ABC7 Accuweather app for iPhone and Android
Weather Radar: LiveDoppler7 radar images
Weather Alerts: Current Watches and Warnings
SHARE YOUR PHOTOS: Show us the weather where you live by tagging your posts, video, and photos #ABC7Now. We may use them on our site, app, social pages, or on TV!