The pups - Teacups, Tunnel of Love, Rita and Space Mountain - were released on Tuesday (14 April), following months of rehabilitation at the RSPCA East Winch Wildlife Centre.
All four were severely underweight at the time they were rescued and needed to build up their strength before being released. Rita and Space Mountain also needed treatment for injuries they had sustained.
The seals were released from a site in the Sutton Bridge area, where they would then make their way out into the Wash.
Teacups, who made the speedy exit into the water, was rescued from Horsey Beach in November last year and she weighed just 9kg, but on her release was a healthy 37.5kg.
Tunnel of Love was rescued in December from Dunwich in Suffolk and she weighed 11.3kg - her weight on release was 36kg.
Rita was also rescued in December from Lowestoft. When rescued she weighed 13.2kg, had wounds on her neck and flipper and was very dehydrated. On her release she weighed 42.5kg.
And finally Space Mountain was rescued in February from Hemsby with injuries to his hind flippers and tail - his release weight was 40kg.
Alison Charles, East Winch centre manager, said:
“Wildlife centre staff, animal carers and vets at the RSPCA have been designated key workers by the Government, and although RSPCA animal and wildlife centres have closed to the public, during lockdown the RSPCA is still continuing to provide care for animals across England and Wales and these four seals are among thousands of animals being looked after by the charity.