Portland is 5 hours behind São Paulo
Best overlap: 1:00 PM to 6:00 PM in São Paulo is 8:00 AM to 1:00 PM in Portland.
Aim for 1:00 PM to 6:00 PM São Paulo time — that's 8:00 AM to 1:00 PM over in Portland. Portland is 5 hours behind São Paulo, leaving about 5 hours of daily overlap — enough for most meetings if you don't leave them too late in the day. These times hold for most of the year, but Portland's daylight saving (which São Paulo doesn't use) shifts them by an hour twice annually.