Summer: air 22-30°C, water 22-25°C. Autumn: air 20-25°C, water 18-23°C. Winter: air 8-15°C, water 10-14°C. Spring: air 18-25°C, water 18-23°C. You can surf all year round but the best season is from November to May.
The spot is good for 3-4 days a week. Usual direction are SE, S and SW. Wind varies from 10-30 knots, depending on the wind direction, best direction is SE, and worst is WSW (gusty).
From Montevideo international airport it is only 10km, the spot is in Montevideo City. The beach is called Malvin, you can get there by bus, car or taxi.