A yellow "be prepared" warning for wind for the whole of Wales is in force from 21:00 GMT Tuesday until 15:00 Wednesday.
Due to that wind, any brief patches of showers will pass through the country as we head into the latter part of the afternoon.
According to the status yellow warning, winds will reach mean speeds of 50 to 65km/h and gusts of 90 to 110km.
Huge waves crashed into the coastlines of Britain and Ireland as Storm Gareth announced its imminent arrival yesterday.
Storm Gareth is due to move into the United Kingdom overnight into Wednesday with gusts of more than 80mph expected in some regions.More news: Daylight Saving Time: Don't forget to spring forward this weekend
A yellow weather warning for rain is also in place in parts of northern England on Thursday and Friday. Officials had planned an 8am check and announced a contingency to postpone Wednesday's card until Saturday, as a forecast for high winds threatened the card.
Storm Gareth swept in across Northern Ireland on Tuesday, causing problems on the roads with fallen trees and the cancellation of ferries.
The warning will be valid from tomorrow at 12:00pm through to Wednesday morning at 9:00am.
As the evening progresses forecasters expect gusts of 70-75 miles per hour along northern coasts, reaching up to 80 miles per hour for a time.
Met Eireann says there is also the risk of coastal flooding due to high seas.
This Evening and Tonight: Very windy, with widespread gales, perhaps severe gales in exposure. Winds will gradually ease during Wednesday afternoon. In Cumbria and farther north, as much as 50-60mm is possible.