To understand the regional heat and water vapor exchange and the flow motion law in Chaohu Lake basin,it is important to study the wind characteristics.The wind and temperature characteristics are analyzed based on the data from automatic weather stations at Hefei,Feidong,Chaohu,Lujiang and Laoshan Island in 2006.Results show that the annual average wind speed of Chaohu Lake basin is 2.17 m/s on land and 2.41 m/s over the lake.Wind speed in spring and summer is larger than that in autumn and winter both on land and over the lake.Wind speed in the daytime is larger than that at night on land,but the diurnal variation of wind speed over the lake is less noticeable.The wind direction on land is from the south in spring and summer,and from the north in autumn and winter,showing a significant seasonal variation.Diurnal variation of wind direction on land in spring and summer is more noticeable than that in autumn and winter.Seasonal variation over the lake was not pronounced.The longer the distance between the lake and the station is,the less the lake-land breeze affects the station.Anomaly of wind direction differences between stations on land and Laoshan Island station and anomaly of temperature differences have consistent diurnal variation,which indicates that the temperature difference is the key factor to influence the lake-land breeze over Chaohu Lake basin.