Borth & Ynyslas Weather Station Info

The Borth & Ynyslas Weather Station

Weather Station Information

The Borth and Ynyslas Weather Station is based at Ynyslas approximately 200m East from the Mean High Water Mark at 52º 31’04″N, 4º 03’06″W.

The station itself a Davis Vantage Pro 2 which consists of an anemometer to measure wind speed and direction and an integrated sensor suite. The integrated sensor suite houses a barometer to measure barometric pressure; a thermometer/hydrometer to measure temperature and relative humidity; and a self-tipping rain gauge to measure precipitation. The wireless integrated sensor suite runs on solar power and has a lithium battery to provide backup at night and during cloudy, wintry weather.

The sensor suite uses “frequency hopping spread spectrum radio technology” to transmit the data to a data logger and console situated within the house. This is then connected to a computer which uses “Weather Display” software to process the data, create various reports and charts and upload them to the web. Once the data has been uploaded I’ve built a custom series of scripts to display it in an easy to digest format on the website.



The anemometer includes both wind speed and wind direction sensors and has been wind-tunnel tested to speeds in excess of 170 mph. The sensors are mounted on a telegraph pole 6m above the ground in as exposed a position as is practically possible.

Anemometer positioning is critical as even small obstacles can affect the reading. However, it is also very difficult to find a site that is accessible, within easy reach and as exposed as one would like. The anemometer has over the years been replaced a few times and updated to newer versions. The pole seems to get higher each time I have to climb it!

The anemometer has a range of 2 to 130 knots and a resolution of 1 knot. Readings are updated every 2.5 seconds

Rainfall Collector

The rainfall sensor is a self-tipping bucket capable of measuring rainfall in 0.2mm increments. Rainfall data is updated every 10 seconds. It has a range of 0 to 9999mm per day or 0 to 9999mm per storm (rounded to 1mm at 200mm and above)

The rain collector is designed to meet the guidelines of the World Meteorological Organisation and is laser-calibrated for accuracy.

Integrated Sensor Suite

The integrated sensor suite contains the thermometer, the hygrometer and the barometer. These sensors are housed within a radiation shield to protect the sensors from solar radiation and other sources of radiated and reflected heat.

Integrated Sensor Suite

The Integrated Sensor Suite is mounted approx. 2.5m above the ground away from any sources of heat such as walls or tarmac.

  • Temperature is updated every 10 seconds with a range of -40ºC to 65ºC and a resolution of 0.1ºC
  • Humidity is updated every 50 seconds with a range of 0% to 100% and a resolution of 1%
  • Barometric Pressure is updated every 15 minutes with a range of 880mb to 1080mb and a resolution of 0.1mb

It actually looks a little different to the one picture above as it has been upgraded since the first installation and now has a re-modelled rain bucket and bird spikes around the rim. The solar panel has been replaced as well.

Other Readings

In addition to the measurements made directly from the sensors listed above other parameters can be derived from these readings. These include:

  • Dew Point
  • Wind Chill
  • Heat Index
  • Cloud Height


To cover the running and maintenance costs of the weather station we are charging a small (£20) annual fee to access the live data. This contribution helps keep the weather station up and running and is hopefully a small price to pay for local, up to the minute weather data from Borth & Ynyslas.

Click here to subscribe to the Borth and Ynyslas weather station, or E-mail us to subscribe offline.

Never base important decisions or events on data from this private weather station, which is offered as a general guide to local conditions only.

You can register for access to the weather station using the button below or if already registered you can access the Borth & Ynyslas Weather Station here.

Click the button below to subscribe now:

or get a weeks trial for just £1 here:

Enjoy the Weather