Horse riders became stranded on Scolt Head Island, off Brancaster, on Monday afternoon, when they were caught out by the fast-moving tide.
A 999 call just before 5.20 alerted the Coastguard to their plight.
A member of the public could see the three horse riders attempting to find a safe place to get off the island to no avail.
Coastguard rescue teams from Wells and Cley and the Wells RNLI lifeboat were all sent to the area.
Against advice, the riders decided to spend the night on the island in the rain with their horses.
Provisions of water, food, blankets, hay and a tent were taken to the island by the lifeboat.
At about 3am, the riders and the horses all made it back with help from the Cley and Wells Coastguard Rescue Teams and the Wells inshore lifeboat.
Coastguard Richard Johnson said: “This is another example why it is so important that you check the tide times before you head out and make sure that you leave plenty of time for your return.”