Today's weather in Cancun and Quintana Roo is expected to be hot, similar to previous days, with potential for isolated showers. A mid-level anticyclonic circulation will continue the second heatwave across a large portion of the country, with temperatures exceeding 45 °C in regions such as Tamaulipas, San Luis Potosi, Veracruz, Tabasco, Campeche, and Yucatan.

By the end of the day, this anticyclonic circulation is expected to move towards the Gulf of Mexico, concluding the second heatwave over the northern, central, and western states. However, these regions will continue to experience hot to very hot seasonal temperatures.

In the southeastern states of Mexico and the Yucatan Peninsula, the heatwave is predicted to gradually weaken over the next 72 hours. Front No. 50 will maintain its stationary position over the north and northeast of Mexico. It will interact with a low-pressure channel over the north and center of the country, and with moisture influx from both oceans, leading to showers and heavy rains. These may be accompanied by electrical discharges and hail in the northeast of Mexico.

Low-pressure channels over the center, east, and southeast of Mexico will likely cause afternoon rains and showers, including in the Valley of Mexico. These may also be accompanied by electrical discharges.

In the Yucatan Peninsula, a cool to warm morning is expected. The afternoon will bring very hot to extremely hot conditions. The sky over Yucatan and Quintana Roo will be partly cloudy, with isolated showers in Quintana Roo. Winds from the east and southeast will range from 15 to 30 km/h, with gusts of 40 to 60 km/h in the region.

In summary, today's weather in Cancun and Quintana Roo will be hot, with a chance of isolated showers.