The RNLI were called out last night.
The lifeboat was called after a passer-by spotted a swimmer in distress in Cromer on Tuesday night.
The swimmer was in the sea, just west of Cromer pier, at around 8.20pm, when a member of the public called 999.
Cromer and Sheringham rescue teams were dispatched and upon arrival discovered that there were two swimmers.
Mark Bonnett, station officer at Cromer Coastguard, said: 'As it looked like one of them were in trouble Cromer ILB was requested to launch to make sure they were ok.
'Before the lifeboat made it into the water the swimmers came ashore where they were met by a coastguard team. It was established that the two swimmers were not in danger but training for a triathlon.'
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