Harbor seals are among California’s most often recorded mammals, with 22,843 records in all, and most of those come from iNaturalist. That fits an animal that rests on beaches, rocks and harbor docks in plain view, often close to roads and coastal trails, where anyone with a phone can take its picture.
Monterey County and the Golden Gate
Monterey County holds 4,021 records, about three times San Mateo’s 1,291, the next county down. Moss Landing helps build that lead. Its state beach and wildlife area both rank among the most often named places in the state, where seals haul out in the calm water of a harbor mouth a short walk from the road. Point Lobos State Natural Reserve adds more from the same county.
Farther north, Golden Gate National Recreation Area is the most often named place of all, with 1,365 records, and Wilder Ranch State Park in Santa Cruz County follows with 523. Both have busy trails along the shore. Records follow visitors as much as seals, so a crowded overlook can outscore a quieter haul-out that holds far more animals.
Pupping season, then the molt
Reports reach their high in July, at 2,464, with April close behind at 2,412. That matches the harbor seal year on this coast, where pups are born in spring and adults spend long hours ashore during the early-summer molt. October is the quietest month, yet it still logs 1,236 records. NatureServe leaves the species unranked in California, though it’s a native animal recorded from San Diego north to Humboldt.
Full species profile
