Wincanton are to hold an early morning inspection before deciding whether Saturday's meeting will go ahead as planned.
Officials at the course inspected the track on Friday, however with freezing temperatures predicted overnight they have decided to look again at 8.30am on Saturday.
Clerk of the course Barry Johnson said: "We are raceable today, but the one down side is that it could get to as low as minus-three degrees overnight.
"We will give it our best shot in getting the meeting on."

Latest Sky Sports News Report
Wigan v Fulham - 2nd Half
Wigan v Fulham - 1st Half
West Ham v Everton - 2nd Half
West Ham v Everton - 1st Half
UBS Hong Kong Open Preview
HSBC Champions Review
Haye is enjoying the moment
Don't miss Alex Quinn's guide to the best bets at this weekend's Breeders' Cup meeting.
Sky Bet are paying an extra place on two of the four televised races from Doncaster on Saturday featuring the November Handicap.
Back Nikolai Valuev, Didier Drogba and Jonny Wilkinson this weekend, says Ed Chamberlin.