She said there should be increasing fine spells for coastal areas such as Wairoa, Napier, Hastings, but the clouds will come back later in the evening on Saturday.
Temperatures on Christmas Day are expected to be average for this time of year, with a high of about 23C for Napier and Hastings.
"With that cloud around, temperatures won't have as much time to increase."
"The cloud that comes back in the evening on Christmas will be around early morning, but then should clear quite quickly to a nice day."
Temperatures are expected to be 26C for Napier and 27C for Hastings.
Boxing Day on Sunday may be better for barbecues, with hotter temperatures and showers less likely.