Jonassen and Wareham share seven wickets in Australia's canter
Australia 83 for 1 (Healy 38) beat West Indies 81 (Jonassen 4-7, Wareham 3-14) by nine wickets
Australia completed an unbeaten tour of West Indies in domineering style as they cantered to a nine-wicket victory with more than 12 overs remaining in the final T20I.
West Indies were bowled out for 81 with only Britney Cooper (29) offering much resistance as Jess Jonassen picked up a career-best 4 for 7 - the fourth best T20I figures for Australia - and Georgia Wareham nabbed 3 for 14.
The chase was a formality as Alyssa Healy cracked 38 off 16 balls to round off her prolific tour in style. The 75 balls remaining was both the most for an Australia victory and West Indies defeat.
"It was always going to be a test tonight," coach Matthew Mott said. "It's been a long trip away combined with the Ashes so I was really pleased with the effort, particularly in the field, to bowl them out then it was a clinical chase. It was a real challenge for the group and they spoke about it this morning. We like to finish off in style and close the book on things so that was the most pleasing thing. Can't ask for much more."
As has been the case throughout the trip Australia made early inroads with Megan Schutt striking in the third over and wickets fell steadily throughout with West Indies unable to build any momentum.
Wareham struck with her fourth delivery to remove captain Stafanie Taylor who was playing her 100th T20I and returned to grab two more. West Indies' last six wickets fell for six runs, including three wickets in six deliveries in the 18th over, with Jonassen, the seventh bowler used by Meg Lanning, helping cut through the lower order.
Australia's chase was off to a blistering start when the opening over from Sheneta Grimmond went for 16 and it appeared Healy would almost knock off the target herself before cutting to short third man.
Victory was sealed by Beth Mooney and Ellyse Perry, the winning boundary coming from an elegant lofted cover drive by Mooney to leave no one in any doubt about Australia's superiority.