Monday's evening meeting at Windsor is the latest fixture to be threatened by the recent heavy rain.
The course has a few waterlogged patches and a 7.15am inspection has been called, but an improvement in the forecast is giving officials hope.
Acting raceday clerk of the course Jon Pullin said: "The going is currently heavy with a few waterlogged patches, so we will inspect at 7.15am. As it has stopped raining and the forecast suggests we will not get any more rain, there is plenty of time for it to dry up a bit."
Monday's meeting at Towcester has been abandoned due to a waterlogged track following heavy rain.
Clerk of the course Robert Bellamy said: "It's been horrendous.We had 28 millimetres of rain overnight and it's still raining hard. The course is waterlogged and it will not improve in time for racing.
"It's due to rain up until mid-afternoon, according to the forecast I've seen, and we wouldn't want any more from now, let alone then. It's as simple as that, I'm afraid."
