Wimbledon is set to experience a heatwave during the second week of the Championships, raising the possibility that matches could be suspended under the tournament's Extreme Heat Policy. The policy is designed to protect players when temperatures and humidity climb to dangerous levels.
How the Heat Rule Works
The heat rule is not based solely on air temperature. It is activated when the Heat Stress Index, measured using the Wet Bulb Globe Temperature (WBGT), reaches or exceeds 30.1°C (86.2°F). This index accounts for air temperature, humidity, wind speed, and the heat radiating off the grass surface. Officials take readings 30 minutes before play begins, at 2pm, and at 5pm.
Once the threshold is crossed, a player can request a structured break to escape the heat. Only one player needs to request it, but the break is granted to both opponents. In best-of-three matches (women's singles), a 10-minute break is allowed between the second and third sets. In best-of-five matches (men's singles), a 10-minute break is allowed between the third and fourth sets. In wheelchair events, the break is extended to 15 minutes.
Rules During the Break
During these mid-match heat breaks, strict guidelines apply to ensure fairness. Players can leave the court, use the restroom, take a shower, or change their grass-court attire. However, they cannot receive medical treatment or tactical coaching during this time.
When the Rule Does Not Apply
The heat rule does not apply to matches played under a closed roof on Centre Court or No. 1 Court, as the roof provides shade and a controlled environment. It also does not apply to doubles matches, which are deemed less physically taxing than singles. Matches that were suspended overnight and are being completed the next day are also exempt.
Suspension of Play
If conditions worsen drastically and the heat stress index exceeds 32.2°C, tournament officials have the authority to suspend play on outdoor courts entirely until conditions become safe. This measure ensures the well-being of players, officials, and spectators.
