AWS Truepower publishes quarterly wind trends bulletin for multiple countries including India. It's a small report containing regional analysis of wind speed trends and patterns, in each country. Recently, they have published the wind trends bulletin India for Q3, 2012. You can download it from the linked web-page in the previous sentence.
As a small summary, they mention that wind speeds at altitudes greater than 80m were above-average in the Northern and Western parts of India. The wind anomalies were greatest in Rajasthan, Madhya Pradesh & Coastal Kerala (>+15%). The wind-speeds for the said quarter were below average in most other regions. You can read more by downloading the report from their web-page linked above.
