There were 350 cases in the seven days to December 21.
The infection rate in the district is now 200.6 cases per 100,000 people - up from 116 on Friday.
The number of weekly cases is up by 186 (or 113.4%) compared to the seven days to December 14.
There were three deaths in the district in the seven days to December 18 – one more than the previous week.
The worst affected are in the district is now Clacton Central, which saw 46 cases in the week to December 16 - an increase of 38 (475%) on the previous week.
Increase - Clacton central is the worst affected area in Tendring
The area still has one of the lowest infection rates in Essex. Colchester's infection rate is 222.9 cases per 100,000 people.