Lewis said the heavy rain warning was forecast to end at 11am today with the rest of the rain looking to clear out of Bay of Plenty shortly after.
"Saturday is off to a dry start but the next weather feature is due to move in from the west towards the end of the day.
"This front brings some rain to the region on Sunday, not too much for the main centres but the eastern ranges will see larger accumulations, as is common for weather systems passing from the west," he said.
Lewis said next week looked to be off to a settled start.
"But by Wednesday we're seeing a substantial difference in how the weather models handle a low-pressure system near the country."