Heavy rain in Wales could lead to flooding and travel disruption, the Met Office has said.
It has brought forward a yellow weather warning to 09:00 GMT on Thursday to last until the weekend.
Most of north, mid and south Wales, fall under the weather warning.
Natural Resources Wales (NRW) warned coastal areas, Snowdonia and northern parts of Ceredigion could be hard hit, with "potential for large waves" due to wind gusts of up to 60mph (95km/h).
There is also the possibility of localised flooding affecting roads.
With big swell forecast today and over the next few days we urge to #RespectTheWater if you live within walking distance of the coast. Avoid exposed coastal areas like cliffs, seawalls and piers.— Porthcawl RNLI Lifeboat (@PorthcawlRNLI) October 28, 2020
Watch the conditions LIVE safely from home: https://t.co/yEbomj4Y6z pic.twitter.com/yJ3hZ4Ug44
The Met Office said "periods of heavy rain" were expected, with the heaviest rainfall of up to 150 mm in north Wales.
"The predicted heavy rain is likely to cause flooding up and down the country over the next few days," said Gary White, NRW duty tactical manager.
Meanwhile, the Royal National Lifeboat Institution in Porthcawl has warned people to avoid exposed coastal areas in the coming days.