The White Ferns have their first series win in the Caribbean after surviving a late batting collapse to defeat the West Indies in the second one-dayer in Antigua.
Chasing just 170 runs for victory, the visitors were cruising at 164 for 5 before they lost three quick wickets to be 167 for 8.
The White Ferns held their nerve to get across the line with two wickets and almost ten overs to spare to seal the series triumph.
Batter Maddy Green anchored the New Zealand innings but was unable to finish the job, caught one short of a half-century with victory in sight.
Brooke Halliday, Lea Tahuhu and keeper Isabella Gaze followed in quick succession soon after.
Otago spinner Eden Carson made a dazzling debut with the ball with the 21-year-old taking 3 for 31 including the wicket of West Indies captain Hayley Matthews on 46.
Green and Lauren Down contributed a 66-run partnership in the middle order. Down was dismissed on 33 off 56 deliveries after scoring four boundaries with New Zealand on 117 for 4.
New Zealand openers Suzie Bates and Sophie Devine were out for 16 and 7 respectively, while in-form all-rounder Amelia Kerr was caught at point on 21.
The West Indies were unable to build momentum with the bat until captain Hayley Matthews came to the crease. She delivered a captain's knock but was out lbw to Carlson on 46.
The next game will be played on Sunday.
New Zealand won the tour opener last Tuesday by five runs in bizarre circumstances under the Duckworth-Lewis scoring system as bad light stopped play.