Ar 31 Mai, gwnaeth Prif Swyddog Meddygol Cymru ddiweddaru ei gyngor i'r rhai sy'n gwarchod eu hunain. O 1 Mehefin roedd y cyngor yn caniatáu ymarfer diderfyn yn yr awyr agored, ac yn nodi hefyd y gallai'r rhai sy'n gwarchod eu hunain gyfarfod ag aelodau o un aelwyd arall yn yr awyr agored, cyhyd ag y glynir wrth arferion cadw pellter a hylendid llym. Er mai newidiadau digon bach yw’r rhain, roeddent yn newid sylweddol ar gyfer y rhai sy’n gwarchod eu hunain, gan nad oedd rhai ohonynt wedi gadael eu cartrefi ers dros ddeg wythnos.
On 31 May the Chief Medical Officer for Wales updated his advice to those who are shielding. From 1 June the advice allowed unlimited exercise outdoors, and also indicated that those shielding could meet with members of one other household outdoors, as long as strict physical distancing and hygiene practices are adhered to. These changes, whilst modest, were a significant change for those who are shielding, some of whom had not left their homes for over 10 weeks.