A string of bushfires continue to burn across northern South Australia but are not causing concern.

The fires, including some which have been burning since Christmas, are in remote areas and are just being left to burn.

The Country Fire Service says they pose no threat to people or property and are being monitored by satellite.

A number of other fires to the south are contained and are still being monitored by small CFS crews.

They include a fire at Finniss, south of Adelaide, at Penola, in the state's south-east and at Sevenhill in the Clare Valley.

Milder conditions across much of South Australia on Tuesday eased the fire danger with Adelaide's forecast top just 31 degrees.

The Bureau of Meteorology expects even cooler conditions in the city and in coastal areas of the state on Wednesday.

However, some far north districts continued to swelter with Oodnadatta among the hottest with 43.5 degrees at 11.35am (CDT).