This is the 'Home' page of the Community Web for the Senni Valley, which is in the centre of the Brecon Beacons National Park. It includes the villages of SennybridgeDefynnog and Heol Senni and is nine miles west of the town of Brecon, Powys, Wales, UK.
Its purposes are to be a web-based information resource for local people and visitors and to develop as a digital archive of local material.

Senni Valley photo
Senni Valley looking North
Click on this picture for a larger version
See also Mari Owen's photos of Senni Valley


(a) Heath Spotted Orchid and Green veined white butterfly
beside the Senni River, 16/6/2013. (b) Welsh poppy in Cwm Du 28/05/2016
Click on a picture for a larger version

Current conditions and annual weather data are available for the upper Senni Valley, 1 mile south of Heol Senni, from a Davis 'Vantage Vue' weather station which is maintained by the Webmaster. Graphs are available of the weather in Senni during the previous week, the previous month and the previous year.
Measurements by the Webmaster of the water quality of the upper Senni river at Heol Senni and on the wooden bridge to the South, over the last two months, have shown no increases in phosphate, nitrate, nitrite or ammonia above normal levels. This is part of a citizen science project coordinated by the Wye and Usk Foundation.

Contributions to this community web, which has the alternative domain names of senni.org.uk, senni.uk, senni.wales and senni.cymru, are welcome and should be sent to the Webmaster.

Updated on 30 June 2024