Abstract: Collections of the real-time sensing of the waves are necessary in deciding the process in the coastal areas. Due to the recent developments in the semiconductor technology, accurate and very reliable sensors are designed and developed. A current technique in the monitoring of waves only uses the point based measurements and commercially the implementation cost is high which is not practical with huge applications. This study proposes the low-cost sensing of the directional waves in the sea Buoy by implementing the MEMS based sensors on it. The system is employed with Inertial Measurement Unit (IMU's) which contains the accelerometer, gyroscope and magnetometer for wave sensing. These low-cost MEMS sensors for direction wave sensing mainly helps in weather and also in several other applications in oceanography.