There was a "low risk" of direct impact on Queensland, but rough conditions and coastal erosion were expected.
The eye of the cyclone remains out at sea where winds are blowing at about 150 km/h, but the strength of Oma is still increasing.
It comes as the system continues its approach towards South-East Queensland, bringing large swells and winds over the coming days.
"Bundaberg's weather will be interesting over the weekend", she said.
Large waves are expected on the east coast.
That's the conclusion of Europe's EC weather modelling.
"Especially those open beaches from Miami right through to the Seaway, the beaches are in good conditions, they're pretty flat, so there's going to be a lot of water running up into the vegetation", Mr Maynard said.
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"But we can not rule out a coastal crossing this weekend and if that happens it means heavy rain for the southern Queensland coast and Brisbane".
"Tropical Cyclone Oma is moving in a south, south-westerly direction and we expect it to remain off shore". It said swimmers should consider staying clear of the water and those rock fishing should avoid exposed coastal platforms.
The weather bureau has issued unsafe surf warnings for the Capricornia Coast, Hervey Bay, Fraser Island Coast, Sunshine Coast Waters, Moreton Bay and Gold Coast from Tuesday onwards.
On the Sunshine Coast, a ute ended up waging a battle with the swell - and losing.
As tropical cyclone Oma moves towards the coast, there were concerns it could whip up some big waves that could damage our shoreline.
"If you're visiting on the beaches and getting close to the foreshore, it becomes quite hazardous due to the strong tidal surges with the swell", Mr Maynard said. GFS (the maps we mostly display at WeatherWatch) shows a higher chance of the storm directly hitting, while ECMWF is showing the high over Tasmania pushing in and weakening the low north of NZ - maybe even pushing it back where it came from.