The White Ferns have swept the West Indies in a second straight series after winning the fifth and final Twenty20 international in Hamilton.
The New Zealand women coasted to a seven-wicket win at Seddon Park on Sunday, meaning they clinch the series 4-0, with the fourth match washed out in New Plymouth.
It followed on from a 3-0 win in the one-day internationals.
A difficult tour for the Caribbean side ended with an ineffective bowling display as the hosts reached 143-3 off 16.2 overs in response to 139-5.
New Zealand were 27-3 before wicketkeeper Katey Martin (54 not out) and Amy Satterthwaite (43 not out) put on an unbroken stand of 116 off 82 balls.
