VILAMOURA, 12 Oct, 2014 (AFP) - In a tournament already reduced to 54 holes by lightning and heavy rain, another deluge left parts of the course unplayable shortly after the final group had teed off at 1pm.
The result was then called at 36 holes.
Levy, 24, carded rounds of 63 and 61 to finish with an 18 under par total having been just one of six players to complete their second rounds on Friday.
His title on Sunday came after winning the China Open in April.
Belgium's Nicolas Colsaerts, who just missed a first ever 59 on the European Tour in the first round, was in second place, three shots off the lead.
"It feels very special," said Levy, who is the first French player to win two titles in the same season in Europe.
"If at the start of the year you had said I would win two tournaments I would say 'never!' to you."
Levy will now head to Ash in England to play in the Volvo World Match Play Championship from Thursday.
"I'm going to try to play like I played the first two rounds," he said. "I've impressed myself with the way I've played golf and I think I need to continue like that."
Final scores of the Portugal Masters at Oceanico Victoria Clube de Golfe which was reduced to 36 holes on Sunday due to storm conditions (GBR&IRL unless stated, par 71):
124 - Alexander Levy (FRA) 63 61
127 - Nicolas Colsaerts (BEL) 60 67
129 - Felipe Aguilar (CHI) 65 64
131 - Richard Bland 66 65, Romain Wattel (FRA) 67 64, Morten Orum Madsen (DEN) 65 66
132 - Chris Wood 68 64, Danny Willett 65 67, Gregory Bourdy (FRA) 67 65, Scott Jamieson 63 69, Michael Hoey 65 67
133 - Thomas Aiken (RSA) 66 67, Tommy Fleetwood 68 65, Paul Waring 67 66, Adrian Otaegui (ESP) 63 70, Rafael Cabrera Bello (ESP) 64 69
134 - Ricardo Gonzalez (ARG) 69 65, John Hahn (USA) 67 67, Thongchai Jaidee (THA) 67 67, Graeme Storm 69 65
135 - Magnus A Carlsson (SWE) 69 66, Branden Grace (RSA) 66 69, Marcel Siem (GER) 67 68, George Coetzee (RSA) 68 67, Emiliano Grillo (ARG) 67 68, Marc Warren 69 66, Thorbjorn Olesen (DEN) 71 64, Justin Walters (RSA) 68 67, Nacho Elvira (ESP) 67 68
Selected
137 - Peter Uihlein (USA) 69 68, Jbe Kruger (RSA) 66 71
139 - Jeev Milkha Singh (IND) 72 67, Paul McGinley 67 72
141 - Sihwan Kim (KOR) 74 67, Hennie Otto (RSA) 72 69, Gregory Havret (FRA) 73 68
142 - Kevin Phelan (USA) 71 71, Darren Fichardt (RSA) 69 73, Darren Clarke 71 71
146 - Shiv Kapur (IND) 76 70
148 - Robert Rock 74 74, Jin Jeong (KOR) 71 77