The bathing season in Wales runs from 15 May to 30 September, and surveys should reflect bather activity throughout this period to provide a comprehensive view of site usage.
Mae'r tymor ymdrochi rhwng 15 Mai a 30 Medi yng Nghymru, a dylai arolygon adlewyrchu gweithgarwch ymdrochi drwy gydol y cyfnod hwn i roi darlun cynhwysfawr o ddefnydd y safle.