The track at Ascot is expected to be soft for the Royal meeting with light rain predicted all week.

"It is currently good to soft on the straight course and good to soft, soft in places on the round course," Ascot clerk of the course Chris Stickels said.

"We've had three millimetres of rain since 8am this morning (Sunday) and it is still drizzling.

"The forecast is for unsettled weather all week and it is simply annoying. There is nothing we can do about it.

"I suppose we haven't had a proper soft ground Royal meeting for some time and it will suit some horses, but for the majority I shouldn't think it would.

"We are forecast to get between five and seven millimetres tomorrow, three to five on Wednesday and between four and five on Thursday.

"While it drains well, once you get to good to soft, three to four millimetres of rain is all it will take to turn it soft.

"I'd say the prospect of good ground is very unlikely now."

The meeting gets underway on Tuesday (Wednesday AEST) with Australia's lone representative Holler to run in the Diamond Jubilee Stakes on the fifth and final day.