ABSTRACTBuoy system could be used to obtain time series data on various meteorological and oceanographic parameters that are useful for developmental project in coastal and oceans, and climate prediction. Buoy development is to build a telemetry system to obtain valid data and can be reproduced so it can be used any time and have a high accuracy. Good data is data that has continuity as time series data. The need of real time data is not only for the climate monitoring and forecasts but also knowledge of climate phenomenon like El Nino and La Nina. The sensors mounted on surface buoys: wind sensors, humidity, pressure, shortwave radiation, and rain gauges.