Storm Brian Wales weather warning from Derek Brockway
The Met Office has issued a yellow "be aware" warning from 04:00 BST on Saturday until midnight with 70mph (112km/h) coastal gales forecast.
The worst is expected on Saturday morning with flooding possible as it coincides with high tides.
High tides are expected to peak between 06:00 and 11:00 on Saturday.
BBC Wales meteorologist Derek Brockway has warned Wales to "batten down the hatches".