IEA forecasts higher oil supply after OPEC+ hike

World oil supply will rise more rapidly than expected this year as OPEC+ members increase output further and supply from outside the group grows.

The International Energy Agency (IEA) disclosed this via a report on Thursday, September 11, 2025.

The IEA said supply will rise by 2.7 million barrels per day (bpd) in 2025, up from 2.5 million bpd previously forecast, and a further 2.1 million bpd in 2026.

OPEC+ is adding more crude to the market after the Organization of the Petroleum Exporting Countries, Russia and other allies decided to unwind its second layer of output cuts more rapidly than earlier scheduled.

The extra supply has raised concern of a surplus and weighed on oil prices this year, Reuters reported.

Supply is rising far faster than demand in the IEA’s view, even though it upwardly revised its forecast for growth in world demand this year to 740,000 bpd, up 60,000 bpd from the previous forecast, citing resilient deliveries in advanced economies.

Oil prices rise over OPEC+ output hike

“Oil markets are being pulled in different directions by a range of forces, with the potential for supply losses stemming from new sanctions on Russia and Iran coming against a backdrop of higher OPEC+ supply and the prospect of increasingly bloated oil balances,” the IEA said in the report.

IEA demand forecasts are at the lower end of the industry range, as the agency expects a faster transition to renewable energy sources than some other forecasters. OPEC, which sees demand rising by more than the IEA, updates its forecasts later on Thursday.

The IEA has been saying the world market looks oversupplied, and Thursday’s report implied that supply may exceed demand by about 3.3 million bpd next year, driven by growth from outside the wider OPEC+ group and a limited expansion in demand.

Last month’s report implied a surplus of almost 3 million bpd for 2026.

The Star