The red warning is triggered when there's a greater than 2 percent chance of getting sick from swimming at a beach.
St Heliers, Herne Bay, Browns Bay, Cockle Bay and Beach Haven are all on a short-term high-risk warning.
Further south, Glenbrook Beach and southern Manukau's Sandspit have also been labelled high-risk.
A huge number of high-risk swimming warnings are in place for Auckland beaches.
Photo credit: Safeswim
The warnings come after wastewater systems were overwhelmed by heavy rain during the weekend. The Council's Safeswim website has issued 12 beaches with a heightened long-term warning, advising people: "Do not swim."
Long-term high-risk areas