Di Resta ran 14 laps, 11 in the first practice session and three in the second while Nico Hulkenberg could manage 15 laps in whole day.
With a timing of 2:51.333, Di Resta was fourth while Hulkenberg was ninth after clocking his fastest lap in 2:59.125 minutes.
"Not much to say after a day when we spent most of our time in the garage waiting for the rain to stop. There were a few moments when the rain eased up this morning, so I managed to do some laps on the wet tyres, but it was very tricky and there were some very wet parts of the track," Di Resta said.
Nico Hulkenberg said, "We did a limited programme because there was no point taking the risk on such a wet track. We think it will be dry tomorrow, but at least we have some experience and data from the wet conditions because you never know what the weather will do in Spa.".