The pictures, taken by his mother, show the future king on a beach during a family holiday earlier this month, Kensington Palace said.
Born George Alexander Louis of Cambridge, George is third in line to the throne behind his grandfather, Prince Charles, and his father. He is the oldest of William and Kate's three children — big brother to Charlotte, 7, and Louis, 4.
Last year's birthday image showed George sitting atop a Land Rover Defender, a type of vehicle beloved by his great-grandfather Prince Philip, who died on April 9, 2021.
The public has seen quite a lot of this future king so far in 2022. Along with his brother and sister, he attended a number of events during the Queen's Platinum Jubilee Central weekend.
He also attended his first Wimbledon final with his parents on July 10.