SINGAPORE - Winds blowing from the south carried the haze away from Singapore on Monday (Aug 29), and they are predicted to continue in a similar direction until Tuesday.

"For the rest of today and tomorrow, the prevailing winds are forecast to blow from the south-east or south," said the National Environment Agency (NEA) said in an advisory at 6pm.

The Pollutant Standards Index (PSI) for the next 24 hours is forecast to be in the moderate range.

As at 6pm, the 24-hour Pollutant Standards Index (PSI) was 65-93, which is in the moderate range.

The three-hour PSI, which is to be phased out by the end of this year, was 53.

The one-hour PM2.5 concentration, between 12 to 20, was within the normal range.

The one-hour PM2.5 concentration over the next 24 hours is expected to stay in the normal range, which is below 55.

One hot spot was detected in Sumatra but the low count was due to cloud cover, said NEA.

"Showers over parts of central Sumatra today have helped to reduce the extent of the haze there," the agency said. "Some haze was still observed over the Strait of Malacca."

Thundery showers are expected on Tuesday morning in Singapore.

Given the air quality forecast, everyone can continue with normal activities, NEA said.

Persons who are not feeling well, especially the elderly and children, and those with chronic heart or lung conditions, should seek medical attention.

For updates, visit the NEA website, Meteorological Service Singapore website, the haze microsite, or use mobile apps myEnv and Weather@SG.

You can also refer to the NEA Facebook page and Twitter account @NEAsg.

The 24-hour PSI entered the unhealthy range for the first time this year last Friday. It improved on Saturday and Sunday, but inched back into the unhealthy range in the north on Monday morning before falling back to moderate after 3pm.