More than 1000 people have gathered at a park in Sydney to voice their support for Israel and the country's "fight against terrorism".

The pro-Israeli rally follows protests across Australia denouncing Israel's killing of nine people aboard Turkish aid ships bound for Gaza earlier this month.

Demonstrators in Sydney and Perth, as well as internationally, have also expressed their outrage over Israel's blockade of Gaza.

Others have come out in support of Israel, and "for peace of democracy in the Middle East".

Speaking in North Bondi on Monday, protest organiser Natalie Green said about 1200 people had gathered at Barracluff Park to show "the Australian community stands in solidarity with Israel".