The person became known to police just before 1am. Officers worked alongside Hayling, Selsey and Portsmouth coastguard rescue teams including a helicopter crew, and RNLI lifeboat teams in efforts to find the person.
The lifeboats and helicopter conducted a sea search, while coastguard rescue teams searched on land, with a police presence, at Hayling.
A spokesperson for the Solent Coastguard said: ‘Police requested from us a maritime and coastal search at around 1.45am, they were contacted about an hour before this about the person in question.
‘Portsmouth RNLI and a coastguard rescue helicopter from Lee-on-the-Solent were involved.
‘The person was later found by police and taken into their care.’