A foreigner suffered a spinal injury when diving off Kemmunet while another suffered head injuries in two incidents over the weekend.
The Emergency Response and Rescue Corps said its lifeguards took both casualties to Gozo General Hospital for urgent treatment.
Its lifeguards also assisted several tired swimmers at the Blue Lagoon, Comino, it said.
The lifeguarding service at Blue Lagoon is being run on a daily basis thanks to the financial support of the Malta Tourism Authority.