The warning starts today, Sunday 20 March, and lasts until Wednesday 23 March.
• West and North-East Scotland EXTREME
• Rest of Scotland HIGH to VERY HIGH
At this time of year, in mid-March, there is a lot of dead grass and heather left over from last year which can dry very quickly.
People who live, work or visit rural areas are being urged to exercise caution.
Deputy Assistant Chief Officer Bruce Farquharson, the SFRS Wildfire Lead, said:
"Over the next few days in high risk areas, fires could burn and spread with very high intensity due to the weather conditions.
"We know how damaging wildfires can be to the environment, wildlife and nearby communities.
"We are asking people to act responsibly when enjoying the outdoors and please think twice before using anything involving a naked flame."