Overnight, a front was expected to pass over the region, bringing some showers to the Bay.
"We expect conditions to be showery for the majority of the day."
The southerly change will drop temperatures by about 10C from yesterday's.
When the front passed over Invercargill earlier in the week, the city went from 21C to 11C in the space of an hour.
The Bay could also see a mild hail storm today.
"Hawke's Bay is one of the high-risk areas for possible hail showers today.
"There will also be some wind about the region but nothing notable," Mr Doolin said.
Heading into tomorrow, things are set to pick back up to 16C, with sunny skies and light winds.
The weekend will be much the same, with 20C forecast for Sunday.