Jim Oswald with the center says the facility is treating 70 pups. That's up from 40 last year.
"The elephant seal pups are caterwauling, if you will, here at the Marine Mammal Center. It's definitely a sight to hear as well as see."
The center has received dozens of calls this spring about stranded pups, many of them underweight.
Biologists are not sure what is responsible for the uptick. But Oswald says the recent storms might have separated mothers from their pups.
"And that decreases their survival rate considerably when mom has disappeared during that critical process. So that's where we come in where we can at least rescue those animals and give them a second chance at life."
Oswald says once the animals are healthy they'll be released back into the ocean at Point Reyes National Seashore just north of the Marine Mammal Center.