The seals and sea lions along the shoreline is certainly a mesmerizing site. Plenty of seals can be found along the cove, so can be swimming and snorkeling next to a seal. But a high concentration of seals are down the shoreline in an area known as the Children's Pool. Swimming is allowed, but not recommended due to the high amount of bacteria from seal feces.
The City has maintained a rope barrier from December 15 through May 15, so that pregnant seals can rest and give birth on the beach without humans coming too close and frightening them. Pupping season is officially mid-January to mid-April.
The city lifeguard service warns that "Like all wild animals, seals and sea lions are unpredictable and can become aggressive quickly. They have sharp teeth and may bite, particularly if cornered or harassed." Sea lions in particular are territorial and can be aggressive, and should be given a wide berth. So don't get too close to get that photo!