Metservice has issued a severe weather watch for the Bay of Plenty west of Te Puke for tomorrow and Saturday.

Rain is expected to become heavy at times early evening Friday through to late Saturday.

Rainfall amounts could approach warning criteria during this time, especially about the Kaimai Range.

MetService forecasters will continue to monitor the situation and advise people in these areas to remain up to date with the latest forecasts in case parts of this watch are upgraded to a full warning.