Anemometer / Weather Station

Circle Graph Key:
In the circle center you can see the live wind speed.
Bottom-left: temperature.
The 5 red circles shows the last 5 wind direction readings.

Hourly Averages from last 32 hrs

15min Averages from last 7 hrs

A fully detailed view including data from the past week is viewable here>> (External link)


Courtesy of the Gibbons Family the Ultrasonic Anemometer has been located on the summit of InisLyre 53° 49.5'N 9° 39'W, 27 meters above sea level which provides a clear view of all quarters enabling a representative sampling of the local wind in Clew Bay.

Mobile Phone Apps

Android application: Download from Google Play
iOS application (iPhone/ iPad): Download from iTunes

Principle of Operation

The can-sized wind sensor measures the time taken for an ultrasonic pulse of sound to travel from the North transducer to the South transducer, and compares this with the time for a pulse to travel from S to N transducer. Likewise times are compared between the W and E and the E and W transducers. If for example a N wind is blowing, then time taken for the pulse of sound to travel from N to S will be faster than from S to N, whereas the E to W and W to E times will be the same. The wind speed and direction are then calculated from the differences in the times of flight on each axis. This calculation is independent of error sources such as temperature and mechanical friction etc.

Being solid state the Anemometer is hopefully virtually maintenance free. It is powered by battery which is kept charged by a large solar panel.

Data is collected every 30 secs and the Graphs are updated every 5 mins.  This is an important safety feature for members and the general public who use Clew Bay.

Technical Specification
For those interested in the technical aspects of the anemometer you can read more on the hardware manufacturer's website here >>