Electricity tariffs will rise for the next three months on higher natural gas costs.

From today to Sept 30, "electricity tariffs will increase by an average of 9.2 per cent or 1.59 cents per kWh compared to the previous quarter", SP services said yesterday in a statement.

For households, the electricity tariff will increase from 17.68 cents to 19.27 cents per kWh. Tariffs in the first quarter of 2016 were 19.5 cents per kWh.

The average monthly electricity bill for families living in four-room HDB flats will increase by $6.79.

The increase is largely due to the cost of natural gas for electricity generation, which rose by 26 per cent compared to the second quarter of the year, SP said.

This was partly offset by lower non-fuel costs, it added.