Mohnbukta is a bay at the western shore of Storfjorden in Sabine Land at Spitsbergen, Svalbard. It is named after Norwegian meteorologist Henrik Mohn.[1] The glacier of Hayesbreen is situated northwest of the bay.[2] At the western side of the bay is the mountain of Kroghfjellet,[3] and north of the bay is the mountain of Teistberget.[4]