At this time of year, there is still a build-up of dead grass and heather left over from last year which can dry very quickly as temperatures increase and pose a heightened risk of fire.
People who live, work or visit rural areas are being urged to exercise caution over the next few days.
The very high warning – released in conjunction with the Scottish Wildfire Forum (SWF) – remains in place until Monday, 29 May. This covers East, Central and Southern Scotland.
SFRS Group Commander, Niall MacLennan said: "Numerous wildfires across Scotland this Spring – including a wildfire at Kinlochmoidart which spanned the course of three days – have shown how real the danger of fire is in the countryside and how damaging it can be to the environment, wildlife and nearby communities.
"With rising temperatures this weekend and further dry conditions into next week, wildfires could burn and spread with very high intensity in high-risk areas.
"Therefore, it is crucial that people act responsibly when enjoying the outdoors and please think twice before using anything involving a naked flame."