In Ba alone, 133 evacuees are at a kindergarten while five more families have taken shelter in a school, Fiji Broadcasting reported.
The heavy rain in Fiji also caused the worst floods on the northern island of Vanua Levu in three years.
A spokesman from the Ministry of Foreign Affairs and Tourism said there were 428 New Zealanders registered as being in Fiji.
But he said they had no reason to suspect any of them would be in the areas most affected by the flooding. "We would advise that anyone over there to keep in touch with their family and friends over here and to register their travel details on the Safe Travel website - safetravel.govt.nz.
"And the other bit of advice for New Zealanders is that if they are in trouble and need assistance, they should contact the High Commission."
Forecasters predicted there would not be any relief from the flooding until at least tomorrow.
The Fiji Meteorological Service said heavy rain would continue to fall over much of Fiji until tomorrow, causing more flooding in low-lying areas throughout the country.
But despite the flood warning, Fiji's Ministry of Information said the first day of the school term would be tomorrow as scheduled.
Education district officers were asked to closely monitor the situation and it was at their discretion as to whether a school needed to be closed.
The ministry also asked members of the public to refrain from crossing flooded roads and rivers and to continue listening to the radio for further updates on the weather.
In 2009, hundreds of tourists from New Zealand and Australia were stranded by flooding in the same areas that have been hit this week.
At the time, authorities declared a state of emergency in areas struck by a tropical storm, which killed eight people and left more than 9000 displaced.