The Met Office has issued a yellow weather warning for strong winds for parts of the south and south-west of England until 21:00 BST.
The warning covers Cornwall, Devon, Dorset, English Channel coastal districts and the Isle of Wight, reaching Sussex by mid-afternoon.
The Met Office said gusts of 45 to 50mph are likely and could reach 55mph in exposed areas.
It added delays to road, rail, air and ferry transport were possible, and there was a risk of power outages and damage to temporary structures.
