As per Wikipedia, although Sahadev was aware of possible future events, he was cursed that if he disclosed the events to anyone then his head would split into pieces.
Since he did not died by his head splitting into 2, is perhaps a good indication that he did not used his "future" seeing power during the war.
However, before the start of the War, because Sahadeva was very good in Astrology, Duryodhana, on the advice of Shakuni approached Sahadeva in order to seek the right time to start the Mahabharata war so that the Kauravas will be victorious.
Sahadeva disclosed the same for the Kauravas in spite of knowing that Kauravas were their enemy,