The Health Protection Surveillance Centre says it has also been informed that three more people with Covid-19 have died bringing the total number of deaths in Ireland to 1,787.
It means the current restrictions will be in place for another three weeks.
The government has published its new roadmap for living alongside COVID.
Taoiseach Mr Martin last night denied that the Government is acting too slowly on introducing Nphet's recommendations for the capital.
Of the 357 new cases notified nationally today 185 are men and 172 are women with 63% being under 45 years of age.
One senior source pointed out that the rate of infection was at 200 per 100,000 people when the measure was introduced for Kildare.
Dubliners are also being "encouraged" to limit travel outside the county.
Most counties will be put on level two for the moment, with Dublin likely to be level three with greater restrictions on home visits after a spike in cases.
"As a result, we will have a high visibility presence throughout Dublin".
We are effectively in level two of restrictions now. But in Dublin this will be limited to 100 people.
The five levels in the plan set out what's allowed in nearly every sector of life over the next six months with one the loosest and five the tightest.
It is being widely reported today that the so-called "wet pubs", those which don't serve food, will remain closed in the capital, while those in other counties will be allowed to open.
In level one of the plan 500 people would be allowed at sporting ventures with capacity for 5,000.
The aim is to keep schools, creches and businesses open in as numerous scenarios as possible, with the government hoping these rules will allow people to have a life while also saving lives.