Racing authorites have been forced to abandon Wednesday's Bairnsdale program due to smoke and deteriorating air quality in the region.

Smoke haze from nearby bushfires in East Gippsland and New South Wales worsened on Tuesday night and Racing Victoria determined that it would be unsuitable for the eight-race card to proceed.

The air quality in Bairnsdale was rated as 'Very Poor' on Wednesday morning.

The meeting had already been brought forward to start earlier under Racing Victoria's Hot Weather Policy, with temperatures forecast to reach 37 degrees in Bairnsdale on Wednesday.

The Caulfield metroplitan meeting, which was originally scheduled as a twilight fixture, will kick off at the earlier start time of 11am to avoid the hottest part of the day.

Melbourne is expected to reach 39 degrees on Wednesday afternoon.