"In continuation of our peaceful movement, we call on the people of Kuwait to take part in a sleep-in (protest) at Erada Square on Saturday, December 15," in a notice posted overnight on the activists' Twitter account.
It said the action would be kept up overnight until Sunday when Emir Sheikh Sabah al-Ahmad Al-Sabah is due to inaugurate the first session of parliament.
Erada ('Will' in Arabic), is the name given by activists to the square opposite the parliament building, which has been the site for scores of opposition rallies over the past two years.
The new parliament, almost entirely dominated by pro-government MPs, was elected on December 1 amid a massive boycott by the opposition in protest at the government's amendment of Kuwait's electoral law.
Following the election, the Islamist, nationalist and liberal opposition has called for the new parliament to be abolished, describing it as "illegitimate" because it was elected on the basis of the amendment.
It was not immediately known if the interior ministry would authorise the new protest but organisers said they have alternative plans.
Thousands of opposition supporters demonstrated on Saturday, demanding fresh elections on the basis of the previous law followed by dialogue with the government on reforms.