Yair Lapid's two-day visit, in which he will open an Israeli consulate in Dubai on Wednesday, is the first to the Gulf state by an Israeli cabinet minister
Israel and Iran are arch enemies and the Jewish state has always opposed the nuclear agreement, which it says could enable the Islamic republic to develop nuclear arms.
Raisi's election "makes clear Iran's true malign intentions, and should prompt grave concern among the international community", foreign ministry spokesman Lior Haiat wrote on Twitter.
Gantz, who tweeted it was a "night of great hope," headed to Washington for pre-scheduled talks Thursday on Iran with US officials including Secretary of State Antony Blinken.
Critics have accused Bennett of betraying his nationalist voters as he pursues a unity government with dovish Meretz and with support from the Arab Israeli Islamic conservative party Raam.