The high likelihood of the cyclone's movement is also expected to lead to strong, gale force winds from Sunday.
Oma was a weak category two storm early on Thursday, sitting about 950km northeast off Brisbane and is moving slowly towards the coast at around 10km/h.
There's a chance that Tropical Cyclone Oma could make landfall as a fully-formed tropical cyclone, according to predictions from the Bureau of Meteorology.
'On Friday, we will see an increase in wind strength and we are expected heavy rain across the weekend, ' he said.
Oma prompted the closure of all Gold Coast and Sunshine Coast beaches ahead of the weekend, as authorities warn beachgoers that getting into trouble in unpredictable conditions could leave swimmers and surfers stranded.
Fuel loads in the Springbrook area are high following dry conditions over the past months, he said.
Unsafe winds, surf and abnormally high tides were expected to continue into the weekend from near Fraser Island down to the NSW border.
A number of beaches remain closed and boaties have been advised not to go out in open water as crews won't be able to rescue them if conditions worsen.
But forecasters do not believe Cyclone Oma will hit that far north.
After that, its behaviour is less predictable.
Wind gusts of up to 98km/h were recorded at Cape Moreton on Moreton Island and 91km/h at Double Island Point, both about 3pm on Saturday.
However, respected models used in the USA and Europe now show an increasing likelihood of the cyclone making landfall in Queensland.
"The Bureau of Meteorology has issued a hazardous surf warning for waters between Yeppoon and the Gold Coast with seas reaching extreme conditions over the coming days", Senior Sergeant Edden said.
"Gale force winds, with gusts greater than 90km/hr, are expected to develop along exposed coastal areas of southern Queensland during Friday well ahead of Oma".
The water levels of the high tide may exceed the highest tide of the year across the south-east Queensland coast on Sunday.
BIG SEAS EXPECTED: Yeppoon is now experiencing high tides and submerged roads with big swells still coming.
A FLOOD watch warning is now in place for the Mary and Burrum rivers.
It is unusual, but not unprecedented, for cyclones to track as far south as Oma could eventually go.
Cyclone Nancy, the last storm to directly impact Brisbane, did not make landfall.
"We're observing waves of three to four metres along the Sunshine, Gold and Tweed coasts with offshore waves in excess of 10 metres".