Yn ogystal, mae'r papur Arolwg Ymweliadau Undydd Prydain Fawr a gyhoeddwyd yn ddiweddar wedi nodi hefyd bod 98.4 miliwn o ymweliadau dydd twristiaeth i Gymru yn y 12 mis a ddaeth i ben ym mis Mai 2017, gyda gwariant cysylltiedig o £4,166 miliwn. Mae nifer yr ymweliadau wedi cynyddu 8.5% o gymharu â'r 12 mis a ddaeth i ben ym mis Mai 2016, ac mae'r swm a wariwyd wedi cynyddu 21.1%.
In addition, the recently published Great Britain Day Visits Survey also reported that In the 12 months ending May 2017, there were 98.4 million tourism day visits to Wales, with an associated spend of £4,166 million. The number of visits has increased 8.5% compared to the 12 months ending May 2016, while the amount spent has increased 21.1%.