Cardiff City host Millwall in the Championship this afternoon. The Bluebirds beat rivals Crystal Palace on Boxing Day to extend their lead at the top of the table to five points.
The ITV Sport website has minute-by-minute updates on the action.
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The heaviest bursts are expected in the south and east, with some western areas either remaining dry or becoming dry by dawn.
Many places will start dry, but rain in the southeast will spread to most for a time overnight.
The family of Isaac Nash who went missing after being swept out to sea last summer have presented a cheque for £10,000 to the RNLI.