Broadband speeds are falling in many European countries as well as North America.

According to data from Speedtest, this is especially visible in the past week, amid an unprecedented lockdown in many countries due to the coronavirus outbreak.

In the U.S., mean fixed broadband download speed decreased from roughly 140 to 133Mbps in the week of March 16, compared to the week of March 9. Over that same period, mobile broadband download speed went from about 75 to 72Mbps.

Image: speedtest

Canada experienced a similar slowdown in that period, from roughly 129 to 121Mbps, while Mexico's broadband speeds remained flat.

Numerous European countries experienced a similar slowdown, too. For example, mean fixed broadband download speed went from about 103 to 93Mbps in Germany, and from 130 to 126Mbps in Italy.

Image: speedtest

Mobile broadband performance was similarly affected in most European countries, with the notable exception of the Netherlands where it went sharply up.

Asian countries are following a different pattern; in China, where the coronavirus outbreak started much earlier and has already peaked, broadband performance decreased in mid-January but has been steadily improving since.

Image: speedtest

Decreased broadband performance is a serious issue at a time when numerous countries around the world are in partial or full lockdown due to the outbreak. The European Commissioner for internal market and services Thierry Breton recently warned that, as people increasingly move to working from home, streaming services are causing additional strain on broadband networks.

Important phone conversation with @ReedHastings, CEO of @Netflix



To beat #COVID19, we #StayAtHome



Teleworking & streaming help a lot but infrastructures might be in strain.



To secure Internet access for all, let’s #SwitchToStandard definition when HD is not necessary. — Thierry Breton (@ThierryBreton) March 18, 2020

Several streaming companies, including Apple TV+, Disney+, YouTube and Netflix, have already reacted to the issue by downgrading streaming video quality in Europe.

Disclosure: Speedtest and Mashable are owned by the same parent company, J2.