Initially at Majuro, "San Francisco" shifted to Kwajalein in early June, and on 10 June, departed that atoll in TG 53.15, the bombardment group of the Saipan invasion force. On 14 June, she commenced two days of shelling Tinian, and after the landings on Saipan shifted to fire support duties. On 16 June, she temporarily joined CruDiv 9 to bombard Guam. Word of a Japanese force en route to Saipan, however, interrupted the cannonade, and the ships returned to Saipan.