Met Office deputy chief meteorologist Mike Silverstone said there would be winds of around 70mph on "exposed coasts" and 60mph "more widely" within the warning areas.
The Met Office said: "Friday's warnings highlight potential travel disruption, dangerous conditions near coasts and the possibility of power cuts for some.".
There is also a yellow warning for rain from 6am until 6pm for southwest and northeast Scotland, with the forecaster warning travel disruption, power cuts, and flooding are "likely".
Yellow warnings have been issued for strong winds from 6am to 10am for eastern parts of Northern Ireland, and from 8am until 3pm for southwest Scotland and parts of western Wales.
"Rain is an additional hazard, with 30-40mm likely in parts of Scotland over a six-hour period, and up to around 70mm possible over higher ground within the warning areas," he added.
