Forecasters say the stormy weather will be caused by ex-Hurricane Opelia, which hit the USA this week and is now heading across the Atlantic with winds of more than 70mph.
Hurricane Ophelia is crossing the Atlantic Ocean and could bring wet weather and gusts of up to 70mph when it hits Britain's shores.
The storm tied a record for the most consecutive storms to reach hurricane force, meteorologist Philip Klotzbach of Colorado State University said.
A stronger Hurricane Ophelia continued tracking northeastward on Thursday morning, far from the U.S. The intensity is somewhat uncertain, however, as there have been no aircraft investigations of the hurricane since it is well away from land over the open Atlantic, forcing forecasters to rely on remote sensing techniques to estimate wind strength.
Met Office forecaster Alex Burkhill said: "Ophelia became a hurricane overnight and the forecast track takes it eastwards towards Iberia for the weekend". That has not happened since 1893, according to McNoldy.
Ophelia is forecast to continue on a northeast to east path for the next few days.
Its interaction with colder water and the jet stream means Opehlia will likely lose its tropical characteristics before reaching Ireland and the United Kingdom, becoming a post-tropical (also called extra-tropical) storm.
As we move into the start of the new week, Ophelia is forecaat to undergo extratropical transition, becoming a post-tropical storm. But that will not have a significant impact on its overall strength as it nears Europe, as Ophelia is expected to have winds of up to 75 miles per hour.
While rare, it is not unprecedented to have post-tropical storms reach the British Isles.