The Met Office has issued a yellow warning for wind on Bank Holiday Monday in the SW, including Cornwall and Devon. Their website says:
A spell of disruptive winds is likely from Monday afternoon and into Tuesday morning. Strong winds are expected to the south of the low centre with gusts widely 40 to 50 mph, but perhaps as high as 60 mph around some coasts and hills of England and South Wales. The winds should gradually ease through Tuesday morning. The strong winds will be accompanied by some heavy rain at times.