In the second match of the T20 Tri-Nations series also involving Scotland, Ireland stumbled to 83 for six in the 14th over but Adair thumped seven fours and two sixes in his 49 off just 24 balls.
While he fell lbw in the final over to Tim Pringle, who was the pick of the hosts’ attack with three for 32, his efforts plus Lorcan Tucker’s 40 off 30 balls formed the backbone of Ireland’s 150 for eight.
The Netherlands reached 69 for two at halfway but were unusually becalmed in the middle period and went without a boundary from the end of the ninth over until the end of the 14th.
Fionn Hand was brilliant with three for 18, while Curtis Campher chipped in with two for 33 as Adair, who took the wicket of Netherlands captain Scott Edwards, was left to defend 20 from the last over.
Paul van Meekeren holed out before Pringle’s back-to-back sixes left three needed off the last delivery but Adair nailed his yorker to concede just a single.
The tri-series resumes on Monday as Ireland take on Scotland.
