The Met Office has issued a yellow 'be aware' warning of heavy rain for parts of North Wales.
It says up to 80mm (3ins) could fall on hills. That may lead to some flooding. It says spray and surface water on roads may make journey times longer.
Meanwhile gale force winds are sweeping the area. The Britannia Bridge has a 30mph speed limit imposed. Drivers with caravans and motorcyclists are being advised not to cross the bridge.