Icelandic citizens defied strong winds and rain today to vote in a parliamentary election with polls showing the opposition led by the anti-establishment Pirate Party could topple the ruling centre-right coalition.

Icelanders' faith in their political and financial establishment was shaken after the 2008 financial crisis and further eroded this year when several senior government figures were named in the Panama Papers on offshore tax havens.

The biggest protests in Icelandic history ultimately led to the resignation of Prime Minister Sigmundur David Gunnlaugsson of the Progressive Party and the early election this weekend.

Founded by Internet activists and led by poet Birgitta Jonsdottir, the Pirates promise to clean up corruption, look into granting asylum to ex-US spy contractor Edward Snowden and involve people more directly in lawmaking.

Polls closed at 10pm GMT (9pm Irish time) with first results expected soon afterward, though bad weather could delay matters.

Turnout in Iceland is normally high at about 80%, but as in most countries, young voters are less likely to cast their ballots, which could hit support for the Pirates.