ITV Wales speaks to shoppers in Pontypridd to find out if the cost of fuel is already too high.
It comes as Consumer Focus Wales says more than 70 per cent of people in Wales are worried about the price of energy rising further.
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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.