Field experiments were conducted during kharif 2003 and 2004 at College farm, College of Agriculture, Rajendranagar, Hyderabad to study the effect of different dates of sowings and varieties on grain yield of aerobic rice. Significantly higher grain yield was obtained with crop sown on 16 June than 18 July in 2003 and 7 July in 2004. Higher water productivity was observed when crop was sown on 26 June during both the years. Among the varieties, higher grain yield and water productivity were obtained with short duration variety Erramallelu.