Wimbledon is set to experience record-breaking temperatures on Monday - the start of the 2025 Championships. The opening-day record of 29.3C - set in 2001 - is expected to be beaten. To help keep players safe, Wimbledon has a heat rule for all singles matches when deemed necessary. Wimbledon uses the Wet Bulb Globe Temperature (WBGT) scale to determine whether the heat rule should be enforced. The WBGT's heat index is a measure which pulls together air temperature, humidity and surface temperature and is measured by a heat stress monitor If the WBGT is at 30.1C or higher, players will be permitted 10-minute breaks during a match. For those played under roofs, the heat rule is not utilised. Send us your questions Temperatures are set to surpass 30C across the first two days of Wimbledon The heat rule applies to all matches in singles competitions, even if they have already started when the WBGT surpasses 30.1C. Only one player needs to request the permitted 10-minute break for it to be enforced. For best-of-five-set matches - in the men's singles - the 10-minute break will be taken at the end of the third set. In best-of-three-set matches, this is taken at the end of the second set. During breaks, players are allowed to leave the court but are not permitted to receive coaching or medical treatment. WBGT readings at Wimbledon are measured 30 minutes prior to the start of play, at 14:00 BST and at 17:00 BST. Where a match is carried over to the following day with the heat rule in place, it will not apply to a best-of-three-set match that has completed one set. It will also not be applied to any best-of-five-set matches that have completed two sets. Should there be a match in progress during which the heat rule is lifted, it will remain in place until completion of that match. The temperature at Wimbledon on Monday is expected to reach 33C, and possibly 34C. That will make it easily the hottest opening day to the Championships - exceeding the previous record of 29.3C set in 2001. The hot weather will stick around on Tuesday, with temperatures once again getting into the low 30s. While 33C or 34C is the maximum air temperature, if you add in the humidity, the players and spectators will experience a heat index - or 'feels-like temperature' - closer to 37C. It may even feel hotter on court, where there is more restricted airflow. However, we're not expecting to reach the highest recorded temperature during the Wimbledon fortnight of 35.7C, which was on 1 July 2015. Cooler weather will move in for the rest of the week with some rain expected on Wednesday and maybe the weekend. This article is the latest from BBC Sport'sAsk Me Anythingteam. Ask Me Anything is a service dedicated to answering your questions. We want to reward your time by telling you things you do not know and reminding you of things you do. The team will find out everything you need to know and be able to call upon a network of contacts including our experts and pundits. We will be answering your questions from the heart of the BBC Sport newsroom, and going behind the scenes at some of the world's biggest sporting events. Our coverage will span the BBC Sport website, app, social media and YouTube accounts, plus BBC TV and radio. Will there be line judges at Wimbledon 2025? Could I qualify for Wimbledon? How are Wimbledon wildcards decided? Why do athletes take pickle juice?
What are the heat rules at Wimbledon?
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"Wimbledon Implements Heat Rules as Record Temperatures Expected for 2025 Championships"
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Wimbledon is anticipating record-breaking heat as it opens the 2025 Championships, with temperatures expected to exceed the previous opening-day record of 29.3°C set in 2001. In light of these soaring temperatures, Wimbledon has established specific heat rules designed to protect the players' health during matches. The tournament utilizes the Wet Bulb Globe Temperature (WBGT) scale to assess whether the heat rule should be activated. When the WBGT reaches 30.1°C or higher, players are entitled to a 10-minute break during matches. This rule applies to all singles matches regardless of their progress, but it does not impact matches played under roofs. Notably, only one player needs to request a break for it to be enforced, and the timing of the breaks varies according to the match format, with the breaks occurring at the end of the third set for men's best-of-five matches and at the end of the second set for best-of-three matches.
The weather forecast indicates that Monday will see temperatures soaring to around 33°C to 34°C, resulting in what could be the hottest opening day in Wimbledon history. The combination of high temperatures and humidity will likely create a heat index that feels closer to 37°C for both players and spectators. While the maximum air temperature is expected to be significant, the conditions on the court may feel even hotter due to restricted airflow. Despite the oppressive heat, it is unlikely that the record temperature of 35.7°C, set on July 1, 2015, will be surpassed during this fortnight. Following the initial hot days, cooler weather is forecasted for the remainder of the week, with potential rain on Wednesday and possibly into the weekend. As Wimbledon continues to adapt to changing weather conditions, it remains committed to ensuring the safety and well-being of all participants.
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