The Albatross Resort course became flooded and unplayable around 2.45pm local time with just 68 players completing their second rounds and four groups still to tee off. Play will resume at 7.30am Saturday local time.
The difficult conditions saw several players struggle Friday with Cullen’s 2-under effort through 16 holes enough to leapfrog 42 players and into a share of 14th.
At 2-under for the tournament he is five behind leader Lee Slattery whose 7-under 64 was a remarkable score in the conditions.
The Englishman found 14 fairways and 17 greens to post eight birdies against a lone bogey and be one ahead of South Africa’s Dylan Fritelli who is 1-under through four holes of his second round.
Another South African, Zander Lombard, is Slattery’s nearest challenger in the clubhouse at 3-under for the week.
Cullen got off to a hot start on day two with back to back birdies to start his round. He added another at the 4th to be 3-under and inside the top 10 but a dropped shop at the 15th was costly.
He is the only Australian in red figures at this point though several have yet to complete their second rounds.
Richard Green, Marcus Fraser and Ryan McCarthy all managed to finish 18 holes, Green 1-over and currently T53, Fraser 4-over and T70 and McCarthy 5-over and T102.
Jason Scrivener is at 1-over for the week with 15 holes remaining in his second round, Brett Rumford 2-over with 13 holes to go and Wade Ormsby 4-over through two holes after a horror bogey-triple bogey start.
Nathan Holman is 1-over through three while Daniel Fox is among the groups yet to tee off.
Leader Slattery was understandably pleased with his play after a season which has seen him record just one top 10.
He described the round as among his most memorable and said he was looking forward to the weekend.
"It’s got to be up there, if not the best round,” he said.
“The only green I missed today was the eighth hole and I hit a great chip to five feet and missed it and had a three on the first for a par.
“So overall, it was a flawless round of golf, 14 fairways and 17 greens because I missed that one green, in this weather it was pretty incredible.”
Slattery, whose wife is overdue with the couple’s second child, said he didn’t expect to still be leading by the end of round two but was unfazed.
"The guys may have a result coming back tomorrow in dry conditions but wherever I lie now, I’m going to be there and in the thick of it during the weekend so that’s all you can do so I’m really happy," he said.