Smoke haze will remain across the Harbour City today, as fires continue to burn over northeastern parts of New South Wales.

The synoptic pattern will remain largely unchanged today, meaning the winds are still directing the bushfire smoke southwards across the Sydney area.

According the Environment NSW, the air quality in the Sydney area is forecast to be "Poor due to Ozone and Particles".

Poor air quality is particularly problematic for individuals who suffer from heart or lung related diseases.

The air quality in Sydney should improve significantly from Sunday afternoon, as rain arrives with a front and trough pushing in from the southwest.

The expected rains will eventually douse many of the ongoing fires, but also result in more efficient dispersal and fallout of the pollutants, as the atmosphere becomes better mixed.