Present investigation aims to study the seasonal fluctuations of micro algae in Kondakarla Lake (Visakhapatnam district, Andhra Pradesh) for a period of one year from March 2024 to February 2025. A total of 115 species were reported which belongs to different categories of algae such as Chlorophyceae (46), Bacillariophyceae (34) Cyanophyceae (27) and Euglenophyceae (8). It was observed that species diversity and abundance of micro algae varied seasonally. Pre monsoon and post monsoon seasons recorded a greater number of species than monsoon season.