Australia's central bank today cut interest rates to a record low and said it was ready to provide further action if needed as policymakers around the world pledge economic support against the impact of the coronavirus.

In lowering rates by 25 basis points to 0.5%, Reserve Bank of Australia boss Philip Lowe warned global growth was expected to be lower in the first half of 2020.

He said that COVID-19 was also having a "significant effect" domestically.

Australia's education and travel sectors, which are heavily reliant on China - where the outbreak started - have been particularly hard hit and surrounding uncertainty is also likely to impact spending. 

"Given the evolving situation, it is difficult to predict how large and long-lasting the effect will be," Philip Lowe said in a statement. 

"Once the coronavirus is contained, the Australian economy is expected to return to an improving trend," he stated. 

"Policy measures have been announced in several countries, including China, which will help support growth. In most economies, including the US, there is an expectation of further monetary stimulus over coming months," he said.

Mr Lowe added that the bank would continue to monitor developments "closely" and was "prepared to ease monetary policy further" if necessary. 

US President Donald Trump jumped on the cut, using it to attack the Federal Reserve and push for a similar move at home. 

"Our Federal Reserve has us paying higher rates than many others, when we should be paying less," he tweeted. 

"Jerome Powell led Federal Reserve has called it wrong from day one. Sad!" he added, referring to the Fed chief. 

The announcement came as other institutions including the Federal Reserve, Bank of Japan and European Central Bank said they were ready to step in to mitigate the economic pressure of the outbreak, which the OECD said could send global growth to its lowest level since the financial crisis. 

Though the RBA struck an optimistic tone about the future, analysts have predicted the country's economy could contract unless the virus is contained. 

They said there is expectation of further stimulus over coming months in most economies. The RBA's focus on offshore central bank developments implies this is not the end of the RBA easing cycle, even if fiscal support is forthcoming, they added. 

Despite a record 29 years without a recession, Australia's economy had already been flagging due to growing unemployment, stagnant wages and high household debt. 

Economic growth was a modest 1.7% in 2019, prompting the central bank to slash rates three times in less than six months. 

A crippling drought and devastating months-long bushfire crisis have also dealt a blow, with the government saying the dry spell had taken a quarter of a percentage point off expansion in gross domestic product.

One bright spot noted by the RBA was stronger house prices, with an uptick in the Sydney and Melbourne markets coming in recent months after a lengthy slowdown.