Welsh councils paid £1.8 million pounds out in compensation claims for road users last year.
The annual Local Authority Road Maintenance Survey says two thirds of roads were badly affected by flooding in 2012.
Between them, councils in Wales filled nearly 160,000 potholes.
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Swansea relieved the pressure on under-fire manager Bob Bradley with an emphatic 3-0 home victory over fellow strugglers Sunderland.
Sol Bamba was sent off after losing his cool but Cardiff hung on to claim a deserved 1-1 draw at Ipswich.
Today's rain will soon clear south-eastwards to leave a largely dry night with some long clear spells.