Environment Southland has issued a flood warning due to heavy rain that has caused some rivers in the region to start rising.
"After a period of heavy rain last night and into this morning, a number of rivers have started rising so we have activated the flood warning on our website," it advised today.
It has stopped raining in the west, but there was still some rain affecting the headwaters of northern and eastern Southland, it said.
MetService said the rain in Southland was expected to clear in the morning and fine spells to increase.
Environment Southland advises the following river information as at 9.54am today:
The Waikaia River at Piano Flat was 1.82m above normal and falling 124 mm/hour.
The Oreti River at Lumsden Cableway was 2.35m above normal and rising 209 mm/hour.
The Irthing Stream at Ellis Rd was 1.69m above normal and rising 236 mm/hour.
The Winton Dam at Winton Dam (Benmore) was 2.17m above normal and steady.
The Makarewa River at Counsell Rd was 2.15m above normal and rising 319 mm/hour.
The Otautau Stream at Otautau was 1.64m above normal and rising 45 mm/hour.
The Waiau River Fishing Camp Rd was 0.38m above normal and rising 308 mm/hour.
The Waiau River Te Waewae Lagoon was 1.32m above normal and rising 308 mm/hour.
Cooler weather to come
Further north, the weather is set to cool today in Canterbury as holidaymakers journey back home.
Metservice is forecasting a high of 19C in the Garden City with a low of 7C.
Rain is expected to develop this morning with cool southwesterlies throughout the day.
The total rainfall forecast for today is 4.6mm.
A heavy rain warning is in place for parts of Canterbury as well.
The warning is for the headwaters of the Canterbury lakes and rivers south of Arthurs Pass between 8am and 8pm today.
"Expect a further 100 to 150mm to accumulate about the main divide, and 50 to 75mm within 15km further east. Peak intensities of 10 to 20 mm per hour are possible this morning," the warning said.
The cooler weather is coming from a front, preceded by strong and moist northwesterlies, which is hanging over the South Island and expected to move north today.