The family of Rotorua swimmer Kane Radford are in Brazil ahead of his race tomorrow night.

His brother Reagan said the family had caught up with Kane and seen a bit of the city.

He said they felt safe.

"I've seen more guns over here than the NZ Army has."

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He said they were staying 100m from where Kane was due to race in Copacabana beach, and described it as a beautiful spot.

However he said one of pieces of the starting pontoon for the race had been washed ashore with a King Neptunes overnight swell causing issues, while the other pieces were "somewhere in the ocean".

Reagan said it would be interesting to see what the Olympic committee organised ahead of the race.

He said the family were now off sightseeing and wouldn't be seeing Kane until after his race, which is scheduled for around midnight tomorrow.