Wheal made his One Day International debut for Scotland against Hong Kong in the 2015–17 ICC World Cricket League Championship on 26 January 2016.
Wheal impressed Benkestein and was offered a development contract with Hampshire for the 2015 season due to a shortage of fast bowlers at the county, with only Chris Wood and Tom Barber as available backups to the first team side.
Wheal impressed greatly in pre-season, performing well in games on the tour of Barbados and in a friendly against Kent.
He was subsequently fast-tracked to selection for the full Scotland team, and in December 2015 was named in the squad for the tour of Hong Kong, that took place the following month.
[5][6] In September 2021, Wheal was named in Scotland's provisional squad for the 2021 ICC Men's T20 World Cup.