England are stepping into unfamiliar territory at the 2026 FIFA World Cup when they meet Norway in Miami on Saturday — a quarter-final encounter that could be played in conditions experts consider borderline dangerous.

What the weather holds

Miami's forecast at kick-off (22:00 BST) points to air temperatures of around 33°C (91°F), but once humidity is factored in, the perceived temperature could climb to approximately 41°C (106°F). The US National Weather Service has issued a heat advisory for the area and warns of a hazardous heat threat with a heightened risk of heat-related illness.

The global players' union Fifpro states that a Wet Bulb Globe Temperature (WBGT) — an index accounting for heat, humidity, and solar radiation — above 28°C should trigger a delay or postponement. Estimates place Miami's WBGT at kick-off between 28°C and 30°C. There is no suggestion the match will be called off.

Thunderstorms are possible, particularly near kick-off, but sunny spells are otherwise expected. The Hard Rock Stadium's enclosed design, unlike many open-air World Cup venues, means spectators are shielded but there is no breeze on the pitch.

Contrasting heat exposure

England's tournament so far has been relatively heat-free. Two group-stage matches were held in the climate-controlled confines of indoor arenas in Dallas and Atlanta, maintained at a comfortable 21°C. Their three outdoor games — in Boston, New Jersey, and Mexico City — were played in cooler, overcast, or wet conditions. The warmest England have faced was 25°C, with cloud cover helping.

Norway, by contrast, have spent far more time in the heat. Their opener against Iraq was played under clear skies at 25°C, and their dramatic 2-1 victory over Brazil in New Jersey came while the area was under an NWS extreme heat warning, with shade temperatures hitting 31°C and the pitch feeling considerably hotter. Their only indoor match was the last-32 win over Ivory Coast in Dallas.

Acclimatisation and preparation

England based themselves in Florida for ten days before the tournament, playing warm-up matches against New Zealand in Tampa and Costa Rica in Orlando. Their tournament training base in Kansas also offers daily temperatures of 32–34°C, which experts say is valuable preparation.

Dr Lee Taylor of Loughborough University, an authority on elite performance in heat and altitude, told BBC Sport that England's dual exposure to hot bases gave them a meaningful physiological advantage.