In a statement on its website, Notts County said:
Notts County's match away to Portsmouth has been postponed because of a waterlogged pitch at Fratton Park.
Portsmouth has called an initial pitch inspection for 12.30pm but that proved inconclusive. With continuous heavy rain, another inspection at 1pm resulted in the match postponement.
Details of the rearranged date and time for the fixture will be released on Notts County's official site as soon as it is confirmed by both clubs.