On 15th January 2010, Thumba (image, image), witnessed one of the longest noontime Solar Eclipse centered at 13:14 LT. In the present case study, we report first observations on sensitivity of the sea breeze circulation cell to short-term obscuration in solar irradiance. Temporal evolution of surface layer windspeed segregated into right-angle components along the coastline on eclipse and normal days indicated a significant reduction in the intensity of sea breeze during the period of eclipse. Vertical thickness of the sea breeze cell was confined to 300 m on the eclipse day, whereas it was extending to about 610 m on the control day.