The gulf of the Farallones National Marine Sanctuary provided pictures of the first sighting on Saturday, about 19 miles outside Golden Gate Bridge.
There were about 40 killer whales in that area that feed mostly on salmon.
There was another sighting this morning off Half Moon Bay, about seven killer whales were seen attacking a harbor seal.
"To have two such sightings, when we have very few sightings at all of killer whales in the Gulf of the Farallones, is pretty extraordinary," said Jane Schramm from the Gulf of the Farallones National Marine Sanctuary.
That particular pod usually feed in Puget Sound, in Washington state and British Columbia.