Roar took an early lead when Lana Harch struck after just 15 minutes and Brisbane dominated the rest of the half, denying Sydney even a chance of a shot on goal.

But Sydney came back in style in the second half with a quick succession of goals, beginning after 66 minutes when Linda O'Neill struck, followed seven minutes later by Sarah Walsh and a third from Julie Rydahl five minute after that.

Roar won a penalty and Tameka Butt converted from the spot in the 93rd minute but it was too late to stop Sydney claiming the title.

"It was a fantastic second half performance, a typical Sydney performance, we started off slow to get into the game" said Sydney's coach Alen Stajcic after the game.

"It took us 15- 20 minutes to really warm up into the game but once the game settled down a little bit, the play starts to level out and we play the football (that we want) and gradually get on top."

The Sky Blues win means Sydney FC have created a football milestone by becoming the first club to win all three national football championships after the men won the inaugural A-League grand final in 2006, the Youth team won in 2008 and now the W-League in 2009.

"It's brilliant (for the club)" said Stajcic on Sydney's record. "I just just got a text from Vitezslav Lavicka wishing us the best . They were down in Melbourne watching it as a group so that is really pleasing that the club is so connected."

The win did not come easily for Sydney after they went behind early in the match with Brisbane's Lana Harch scoring in the 15th minute after a controlled header by Joanne Burgess left Harch with plenty of room to score.

Sydney almost hit back one minute later when Leena Khamis's shot went narrowly over the crossbar and they were unlucky again in the 21st minute after a Sarah Walsh shot, from what seemed an impossible position in right hand corner of the pitch, dropped hitting the goal frame and going over.

A corner in the 31st minute from captain Heather Garriock was almost headed into the goal by the Brisbane defence but fortunately for Roar, it traveled straight into the safe hands of keeper Casey Dumont.

The first half drew to a close with Sydney unlucky to be a goal behind with the Sky Blues creating more scoring shots to lead Roar seven to four on attempts.

In front of a vocal home crowd of 1,439 the second half again started in Sydney's defensive end after a free kick was hit wide of the goals in the second minute by Roar's Karla Reuter

But it was not long until the Sky Blues started to pressure Roar's defence with a free kick on the edge of the box in the 49th minute saw Kylie Ledbrook's shot seemingly destined for the top right corner of the goal until the long arm of Casey Dumont reached out and collected the ball.

Sydney's scoring luck finally changed in the 66th minute when Brisbane failed to clear the ball out of the danger zone giving Sarah Walsh the chance to pass to Linda O'Neill. O'Neill did not disappoint and powerfully put the ball in the back of the net and leveling the game.

The crowd thought that Sydney had taken the lead two minutes later when Heather Garriock's shot found its way past the keeper. The home fans were ecstatic until they realised that the goal was ruled offside but they did not have to wait long to celebrate for the next goal as Sarah Wash slotted in a long field pass to take the lead and control of the game in the 73rd.

Brisbane must had felt like luck had deserted them completely when a corner kick hit Nikola Deiter's shoulder and then the top bar on its way towards the goal line before Kylie Ledbrook headed the ball out of danger.

When Sydney's third went in on the 78th minute after a Julie Rydahl shot from outside the box found the back of the net, the games seemed out of reach for Brisbane.

A late penalty conversion by Tameka Butt in the 92nd minute came too late as the final whistle came within seconds of the restart and Roar had run out of time.

Despite being down at half time Alen Stajcic felt confident that his team could win.

"I knew it was a 50-50 game at half time and even before the game," he said. "At 1-1 or 2-1, any game with quality players like (we had) you know that anything is possible."

"It was a great performance and true Sydney type win, getting better as the game went on."