Heavy rain over the weekend saw extensive flooding in west Wales
Two flood warnings remain in place in Wales following heavy rainfall on Sunday night, with strong winds expected to remain throughout the day.
The lower Dee valley from Llangollen in Denbighshire to Chester, and Tenby in Pembrokeshire are the affected areas.
Some fast ferry services between Holyhead and Dublin are cancelled.
In Powys, the A4077 between Crickhowell and the A465 at Gilwern closed after a tree fell, and will not reopen until later in the morning.
The Cleddau Bridge on the A477 is closed to high-sided vehicles and motorcycles between Pembroke Dock and Neyland due to high winds.
A weather watch for heavy rain is in place across mid and south Wales, but the rain is expected to push through quite quickly thanks to the winds, according to BBC weather forecasters.
Gusts of up to 60mph are possible, especially in the Anglesey area.
The heavy rain is expected to give way to sunshine and showers.
However further heavy rain is predicted for Wednesday and Thursday, with up to six inches (15cm) of rain predicted to fall across Wales and northern England.
Meteogroup UK forecaster Matthew Dobson said: "We expect to see quite a lot of wet weather in the north and west areas, which could lead to flooding.
"It is looking like there will be strong winds of 50-60mph across the north and west."
Irish Ferries' fast ferry Swift sailings between Holyhead to Dublin have been cancelled for Monday, with passengers transferred to the conventional ferry services instead.
Stena Line said it was possible its 1025 GMT sailing from Holyhead and Dun Laoghaire and the return journey at 1330 GMT could both be disrupted, and asked passengers to contact its ferrycheck service on 08705 755755 or 01 2047799 from Ireland.
West Wales was badly hit with flooding on Friday and Saturday, with 140 flood-related calls to the fire service, mainly in Pembrokeshire.
Several people were rescued from vehicles, including a man whose caravan floated away in Gwynedd, and a fire engine left the road in Pembrokeshire.
Gusts reached about 70mph in some coastal areas, before the rain stopped.