The Bureau of Meteorology has issued a severe weather warning to southern parts of the ACT with wind gusts of up to 60km/h forecast.

As much as 25 millimetres is expected to fall in the ACT on Monday due to the coastal low system, as it sweeps across southern parts of NSW.

The ACT Emergency Services Agency said it had responded to at least 60 calls for help from the public following the storm.

"Most calls for help have been related to damage caused by strong winds including fallen trees and flying debris," an Emergency Services Agency spokeswoman said.

"Strong winds are expected to continue until tomorrow and the ACT SES advises the Canberra community to e mindful of their surroundings, not to stand or park their vehicles under trees and stay away from fallen power lines."

Meteorologist at the bureau Shuang Wang said areas to the south of the ACT near the Brindabellas were likely to cop the most rain in coming hours.

"Most of the ACT will get around 20 to 25 millimetres, while the high-peak areas will receive around 30 to 40 millimetres," Ms Wang said.

Damaging winds are expected across the ACT and surrounding areas including the Snowy Mountains, Southern Tablelands and the South Coast.

While the large gusts were expected to come through on Monday, the weather system was expected to decrease in intensity in the early hours of Tuesday morning.

"Winds are expected to gradually ease overnight or on Tuesday morning, as the low gradually weakens and moves east," the bureau said.

The severe weather warning was issued for parts of the ACT along with the South Coast and Snowy Mountains after a deep low pressure system moved to be just off the Illawarra coast.

"[The system] is expected to remain slow moving [on Monday], bringing damaging winds, rain and large wind-driven waves along southern parts of the coast," the bureau said.

Ms Wang said the system would move east on Tuesday, leading to an easing of conditions.

"Tuesday will still have the chance of showers, but only around 1 millimetre in the morning and fresh southerly winds between 25 and 35km/h," Ms Wang said.

"The wind will drop off, however, by Tuesday evening."

Temperatures on Monday hovered above 10 degrees for most of the day, but the cold minimum temperatures are expected to make a return later in the week.

Lows of just 1 degree are expected on Wednesday with no rain forecast for the rest of the week.

"After Wednesday, the ACT region will come back to the classic winter conditions, of cold and frosty mornings and then mostly sunny for the rest of the day," Ms Wang said.