After winning the toss and choosing to bat first, the Harpy Eagles were restricted to just 190 all out off 43 overs.
Openers Anthony Bramble (60) and Tagenarine Chanderpaul (30) put on a partnership of 93 before they were both dismissed in the 18th over. The only other batsmen to reach double figures were Shimron Hetmyer with 37 and Kevin Sinclair with 36 as Justin Greaves took 4-39 from eight overs for the Volcanoes.
Gudakesh Motie and Sherfane Rutherford then combined for six wickets to help restrict the Windwards to 129 all out in 38 overs.
Sunil Ambris (43) and Kavem Hodge (38) did the bulk of the scoring for the Windwards against Motie’s 3-31 off nine overs and Rutherford’s 3-25 off eight overs.
Guyana have now overtaken the Trinidad & Tobago Red Force at the top of Group A with 12 points from four games while the Windwards remain third on eight, two points behind T&T.
In a match reduced to 41 overs-per side, the Hurricanes were first bundled out for 139 in 34.2 overs after being put in to bat by the Harpy Eagles.
Captain Rakheem Cornwall top scored with 36 while Jeremiah Louis made 34.
Justin Greaves, who came into this game on the back of scores of 111* against the West Indies Academy, 112 against the Barbados Pride and 151* against the Trinidad & Tobago Red Force, could only manage 27 this time around.
Man of the match Veerasammy Permaul took 3-24 from nine overs and was supported well by Ashmead Nedd and Nial Smith who took 2-19 from eight overs and 2-42 from eight overs, respectively.
Guyana then needed only 27.5 overs to reach 141-2 thanks to half centuries from captain Tevin Imlach and Matthew Nandu.
Imlach made 69* off 76 balls, his third fifty of the season, while Nandu made a 74-ball 50.
Full Scores:
Leeward Islands Hurricanes 139 off 34.2 overs (Rakheem Cornwall 36, Jeremiah Louis 34, Justin Greaves 27, Veerasammy Permaul 3-24, Ashmead Nedd 2-19, Nial Smith 2-42)
Guyana Harpy Eagles 141-2 off 27.5 overs (Tevin Imlach 69*, Matthew Nandu 50).
The verdict comes nearly two months after the tournament, which India won by beating South Africa by seven runs in the final on June 29.
In those two games at the Nassau County Stadium, Sri Lanka were skittled out for 77 against South Africa on June 3 while Ireland were dismissed for 96 by India two days later.
In the second game, a number of players from both sides copped were struck on the body as a result of the uneven bounce in the pitch.
Indian captain Rohit Sharma had to retire hurt as a precautionary measure after being hit on the upper arm by Josh Little.
India wicketkeeper Rishabh Pant and Ireland batsman Harry Tector were also struck as a result of the nature of the surface.
At the time, Andy Flower had said the pitch in New York was "bordering on dangerous," while former England captain Michael Vaughan called it "shocking."
The venue in New York was readied in five months. Damian Hough, chief curator at the Adelaide Oval, was brought in by the ICC to prepare the drop-in pitches.
But after criticism from various quarters, the ICC had acknowledged that the pitches there had been substandard and the short turnaround time between matches didn't help. New York hosted eight games in two weeks.
Remedial work was carried out, and ahead of the following game, between Canada and Ireland, areas where grass shoots were growing under the cracks were covered with topsoil and rolled in to make the surface much flatter.
The surfaces used for the subsequent fixtures in New York, including India vs Pakistan, where 119 beat 113 for 7, have been rated as "satisfactory".
The bigger point of scrutiny, perhaps more than New York, was on the surface for the semi-final, where Afghanistan were bowled out for 56 at the Brian Lara Cricket Academy.
The wicket was wildly unpredictable as some deliveries rolled along the ground while a few reared up from a similar spot.
At the time, Afghanistan head coach Jonathan Trott was clear "that's not a pitch you want to play a semi-final on".
Generally, surfaces at the Brian Lara Cricket Academy were a challenge. West Indies, who scored 149 there and defended it narrowly against New Zealand, were tottering at 30 for 5 at one stage.
The ICC rates pitches, and outfields, for all international games on a scale of very good to unfit: very good, good, satisfactory, unsatisfactory and unfit.
The surface at Providence for the India vs England semi-final was rated "satisfactory", while the Kensington Oval deck for the final between India and South Africa was rated "very good".
The ICC was largely happy with the state of the outfields, with only New York and Guyana receiving "satisfactory" ratings, while the others were "very good".
Powell hit 102 off just 87 balls including 10 fours and three sixes to lead the CCC in a successful chase of 265, reaching 267-8 with five overs in hand.
The Nevisian former West Indies batsman was supported well by Shaqkere Parris who hit 44 while Jonathan Drakes and captain Shamarh Brooks also had a lot to do with the successful chase with 35 and 33, respectively.
Chemar Holder bowled with good pace on his way to 3-58 from his 10 overs while Jomel Warrican took 2-57 from his 10 overs.
Earlier, the Pride posted 264-7 from their 50 overs after losing the toss.
Kevin Wickham led the way with 65 while Zachary McCaskie and Leniko Boucher also got fifties with 53 and 52, respectively.
Akeem Jordan took 3-49 from 10 overs while Romario Greaves sook 2-47 from his full quota of overs.
Full Scores:
Barbados Pride 264-7 off 50 overs (Kevin Wickham 65, Zachary McCaskie 53, Leniko Boucher 52, Kemar Smith 32*, Akeem Jordan 3-49, Romario Greaves 2-47)
Combined Campuses and Colleges 267-8 off 45 overs (Kieran Powell 102, Shaqkere Parris 44, Jonathan Drakes 35, Shamarh Brooks 33, Chemar Holder 3-58, Jomel Warrican 2-57).
