Global oil demand will rebound more slowly in 2021 than previously thought because of the lingering impact of the coronavirus pandemic, OPEC said on Dec. 14, hampering efforts by the group and its allies to support the market.

Demand will rise by 5.90 million bbl/d next year to 95.89 million bbl/d, OPEC said in a monthly report. The growth forecast is 350,000 bbl/d less than expected a month ago.

The prospect of a weaker demand recovery has already prompted OPEC and its allies, a group known as OPEC+, to slow the pace of its scheduled oil-output boost in 2021. An OPEC+ panel gathers on Dec. 16 to review the market.

Oil has rallied above $50/bbl, its highest since March, supported by hopes that a rollout of vaccines will lift demand, despite major European countries remaining in lockdown mode. Germany is imposing stricter measures from Dec. 16.

OPEC said that, while fourth-quarter growth was forecast to slow as lockdowns are re-implemented and it was possible some of these measures may be extended into 2021, vaccine developments had brightened the economic outlook.

"While the 2021 forecast remains at 4.4%, recent positive news about faster-than-anticipated vaccination programs in major economies provides potential upside for next year's growth forecast," OPEC said in the report.

The group has lowered its 2021 demand growth forecast from an initial 7 million bbl/d in July. OPEC also in the report left its estimate of this year's historic contraction in oil use steady at 9.77 million bbl/d.

The report showed rising output too, another headwind for OPEC+, despite continued strong OPEC compliance with pledged supply curbs made this year as the pandemic hit demand.

OPEC said its output rose by 710,000 bbl/d to 25.11 million bbl/d in November, driven by a rebound in Libya, an OPEC member exempted from making cuts.

The group forecast demand for its crude will be 200,000 bbl/d lower than expected next year at 27.2 million bbl/d. That would still allow for higher average OPEC production in 2021.