Noumea, the capital of French New Caledonia, has become a popular tourist destination from Australia and New Zealand especially as more and more cruise lines dock their ships there for a day as part of a cruise itinerary.
Can you see it all in one day though? I would say no. It is possible to see quite a bit if you plan it out well.
We recently visited Noumea for a day, arriving on Royal Caribbean’s Voyager of the Seas at 8:30am and departing at 4pm on a Thursday.