The Friday rally was the second mass anti-government demonstration organized by al-Wefaq since the heavy mid-March government crackdown on protesters.
Witnesses say regime forces were closely monitoring the rally and a military helicopter was hovering over the city. But there were no reports of clashes or arrests.
The first protest rally was hold last Saturday under the banner “Bahrain, homeland for all” in the village of Sar 10 days after a state of emergency was lifted.
Al-Wefaq leader cleric Sheikh Ali Salman told protesters on Friday that the opposition was not against dialogue with the government if rights interlocutor and officials were involved.
“The success of dialogue, reform and transition to democracy need officials that believe in it. One of the problems of the past was that many officials did not believe in democracy and reform,” AFP quoted Salman as saying to the crowds.
Similar protest rallies were also held in some other Bahraini villages and towns. Witnesses say regime forces fired teargas at protesters in Karzakan village, west of the country.
Bahraini opposition demands the release of detained anti-government protesters, the suspension of trials against opposition activist and a halt to the dismissal of students and workers before the beginning of the national dialogue set for July 1.
Thousands of anti-government protesters have been staging demonstrations in Bahrain since mid-February, demanding political reforms and a constitutional monarchy, a demand that later changed to an outright call for the ouster of the ruling Al Khalifa family following its brutal crackdown on popular protests.
Scores of people have been killed and hundreds, including doctors and journalists, were arrested in the Saudi-backed crackdown on peaceful protesters in Bahrain.
Human rights groups and the families of protesters arrested during the crackdown say that most detainees have been physically and mentally abused, while the whereabouts of many of them still remains unknown.
Amnesty International and Human Rights Watch have bitterly criticized Manama for its brutal crackdown on civilians.