MetService meteorologist Andrew James said the pattern would continue through the weekend, with more fronts bringing rain mainly to the west, while the east coast of both islands should remain a little drier.
A southwesterly flow of wind meant temperatures would stay low in the south for the next few days, James said.
Aucklanders got a shock to the system on Friday when the unseasonably warm May temperatures dropped suddenly.
While it's set to be reasonably wet for the rest of the weekend and early next week in Auckland, it won't be cold.
The temperature is forecast to sit at about 19C.
Today's outlook
• Auckland: Fine spells. A few showers, mainly in the evening. Westerlies. 19C high, 13C overnight.
• Hamilton: Fine spells but chance of showers. Westerlies. 18 and 10.
• Tauranga: Mainly fine, but a chance of a shower or two from afternoon. Westerlies. 18 and 12.
• Wellington: Mainly fine, but a few showers at night. Northwesterlies rising to gale in exposed places in the afternoon. 16 and 12.