The 18 confirmed new cases of COVID-19 take the total since the start of the pandemic to 1,360 on Wednesday.
No additional deaths were recorded, the fatality toll standing at 33.
The Disease Prevention and Control Center (SPKC) said 2,290 tests had been conducted during the previous 24-hour period.
In total 242,823 tests have been carried out since February 29.
So far 1,135 patients have recovered from infection.
Three patients are in hospital, all described as having moderate symptoms of the disease.
Pēdējās 24h veikti 2290 COVID-19 testi, reģistrēti 18 jauni saslimšanas gadījumi. Latvijā kopā veikti 242 823 izmeklējumi, saslimušas 1360 personas un 1135 izveseļojušās, 33 mirušas.— SPKC.gov.lv (@SPKCentrs) August 26, 2020
SPKC said 11 of the new cases appeared to come from contact with other known cases, two were arrivals from other countries and the other cases were still being investigated.
Responding to the double-digit rise on Twitter, Health Minister Ilze Viņķele said:
"After such a long time with small statistics, 18 seems like a lot. This makes us aware that we must continue to be responsible and cautious. But this does not mean that restrictions need to be strengthened. This will be decided by the figures for the coming days. Only public cooperation can limit COVID."
The last time 18 cases of COVID-19 were recorded in Latvia was August 6. Prior to that such a large daily increase was seen as far back as May 16.
A useful summary in English of the latest COVID-19 situation including restrictions in place and rules on public assembly is available at this special government website.
Cīņa ar #COVID19 izplatību nav noslēgusies - iepazīsties ar noteikumiem, kurus nepieciešams ievērot savas un sabiedrības veselības saglabāšanas nolūkā arī pēc ārkārtējās situācijas noslēguma! ☝🏼— Valdības māja (@Brivibas36) June 10, 2020
🇷🇺: https://t.co/0kkd2fjtMd pic.twitter.com/4Olb79FUkr
The number for medical emergencies is 113, the number for enquiring about a COVID-19 test if you have developed some potential symptoms after returning from overseas or being in contact with someone confirmed as having coronavirus is 8303 and the SPKC COVID-19 advice helpline is 67387661.
The SPKC has information in English about the approved methods of protecting yourself from the virus, symptoms and medical procedures and an interactive map plotting the incidence and distribution of the disease in Latvia.
See our other story about the latest list of countries which require self-isolation for people arriving in Latvia. The list is revised every Friday.