It comes at a time when the region is becoming increasingly dry, with Napier receiving only a fifth of the average expected rainfall in January.
There will also be strong south-easterly winds on Tuesday.
In Central Hawke's Bay and Wairoa, the southeasterlies on Tuesday are forecast to become strong in exposed places in the morning.
Temperatures throughout the region at this time are expected to be in the low 20s.
On Monday Napier, Hastings and Wairoa is predicted to be 23C and 24C in Waipukurau.
Tuesday will be 20C in Napier and Hastings, 19C in Wairoa and 18C in Waipukurau.
Lu said that later on Wednesday a ridge of high pressure over the South Island will spread over the North Island and push away the low pressure system causing rain.
The later part of the week is expected to be dry.
Thursday will start to become fine and southeasterlies will die out in the morning before a fine Friday and Saturday.