The 2016–17 UK and Ireland windstorm season was the second instance of the United Kingdom's Met Office and Ireland's Met Éireann naming extratropical cyclones. Substantially less active than the previous season, the season succeeded the 2015–16 UK and Ireland windstorm season and preceded the 2017–18 European windstorm season.

There was a by-election in the British parliamentary constituency of Copeland on 23 February 2017, following the resignation of Labour Member of Parliament (MP) Jamie Reed. Conservative candidate Trudy Harrison gained the seat from Labour, the first gain for a governing party in a by-election since 1982.