"There are some showers on the border of the ACT at the moment but it's just starting to edge in as we speak and most of the rain will be through the afternoon and the evening," the Bureau of Meteorology's Hugh McDowell said on Wednesday morning.

Canberra could be drenched with 30 to 50 millimetres of rain on Wednesday, and possible storms are forecast.

Severe thunderstorms aren't expected for Wednesday but are possible for Thursday, when 15 to 20 millimetres of rain is anticipated.

There are currently no weather warnings out for the ACT, but it's "possible to likely that we'll see warnings in place at times over the next few days," Mr McDowell said.

As outdoor recreation restrictions ease further on Friday, hopes of a clear weekend have not yet completely been dampened.

"Things are starting to ease off into Friday," he said.

"Still likely to see some showers but the rainfall total is coming down and we're not expecting to see thunderstorms and we're not expecting to see severe thunderstorms on Friday."

Saturday still has a 70 per cent chance of rain, but only 2 millimetres of rain forecast: "So probably a fairly pleasant day on Saturday with just a couple of passing showers," Mr McDowell said.

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With recent rain and soil moisture very high, the risk of damage from falling trees is increased. The Canberra community are reminded to do what you can to prepare your home for storm and the chance of localised flash flooding.

ACT Emergency Services Agency (ESA) on Monday issued a warning that the risk of falling trees in Canberra is increased due to to recent rain and high soil moisture.

The ESA advised people to move their cars under cover or away from trees; not to drive, walk or ride through floodwater; to secure loose items around the house, yard or balcony; keep at least 8 metres from fallen power lines and to stay indoors away from windows.

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