Being close to the west coast of Scotland, Cashel experiences a maritime climate with a predominately south-westerly air stream.

In general terms this leads to high rainfall throughout the year and relatively cool temperatures. Wind speeds are generally above average, increasingly markedly with altitude. Annual precipitation is between 1,600 and 2,000 mm and snow may lie above 350m between September and May. Exposure varies from sheltered to severe, with the south-east side of the farm being the most sheltered.