Volunteers from Hunstanton RNLI were tasked to assist the party at Thornham in Norfolk just before 5pm.
They launched hovercraft Hunstanton Flyer as darkness was falling and a high spring tide flooded the tidal marshes.
The hovercraft arrived at Thornham, some four miles to the east of its station, at around 5.10pm
Crew on board the craft quickly located the two people along with their dog and picked them up, before transferring them ashore to the care of the Coastguard.
Hunstanton Flyer was back on station by 6pm, after which the craft was washed down and re-fuelled ready for service.
Notes for editor
Hunstanton is one of just four stations around the UK coastline which operates a search and rescue hovercraft.
The nimble, high-speed craft can reach areas inaccessible to boats.
Its volunteer crew train constantly to meet the challenges they face ranging from people cut off by the tide, to assisting vessels in difficulty and those aboard them or searching for missing persons.
They are supported by volunteers including launch crew, shore crew and tractor drivers, along with the station's visits team, shore safety team, souvenir shop staff and members of the Hunstanton Lifeboat Guild who organise fund raising events.
RNLI media contacts
For more information call Chris Bishop, Hunstanton RNLI volunteer Deputy Lifeboat Press Officer on 07584 147219 or Clare Hopps, Regional Media Officer on 07824 518641.
Key facts about the RNLI
The RNLI charity saves lives at sea. Its volunteers provide a 24-hour search and rescue service around the United Kingdom and Republic of Ireland coasts. The RNLI operates 238 lifeboat stations in the UK and Ireland and more than 240 lifeguard units on beaches around the UK and Channel Islands. The RNLI is independent of Coastguard and government and depends on voluntary donations and legacies to maintain its rescue service. Since the RNLI was founded in 1824, its lifeboat crews and lifeguards have saved over 146,000 lives.