Eighty male Yankasa sheep were used in two different experiments. A set of forty sheep, divided into four groups of ten rams each, were used in each experiment. The animals weighed, on average, 20 kg and were 15 months old. The animals were selected from the sheep flock of the Ahmadu Bello University Farm. They were grazed for 6 h daily for a period of 50 days during which they were subjected to intermittent watering. Watering intervals were 24 h, 48 h, 72 h and 96 h for Treatments 1, 2, 3 and 4, respectively. The experiment was carried out during the wet season of June to August and repeated in the hot, dry season of March to April, using another set of 40 Yankasa male sheep to find seasonal variations. The animals were not allowed to drink on the field when grazing during the rainy season. Seasonal variations had significant ( P < 0.05) effects on the water intake and weight gains of Yankasa sheep. The animals lost 18.8 g, 115.2 g and 172 g daily on 48 h, 72 h and 96 h watering intervals in the dry season, but, on daily watering, they gained 66 g. During the rainy season the animals gained 135.6 g, 124.4 g, 108 g and 92.2 g body weight daily under 24 h, 48 h, 72 h and 96 h watering intervals, respectively. Slight variations were noted in rectal temperatures between treatments with a range of 39.07°C–39.59°C for the dry season and 38.73°C–38.95°C for the wet season. Respiratory rate was significantly ( P < 0.05) affected by watering intervals, especially during the dry season, with average values of 32.4, 25.8, 20.5 and 19.9 for 24 h, 48 h, 72 h and 96 h watering intervals. Jaw movements were reduced with long watering intervals, and also pulse rate, especially in the dry season. The results suggest that grazing Yankasa sheep do not have to be watered daily during the wet season but free drinking water is very essential, at least every 24 h (daily) during the dry season.