Hot weather at work: What employers should consider during a heatwave

When the sun comes out, most people welcome it. Longer days, warmer temperatures and the prospect of summer holidays can all help boost morale.

However, periods of hot weather can also create challenges for employers. From reduced productivity and increased absence to dress code questions and requests for greater flexibility, managers often find themselves balancing employee wellbeing with the practical needs of the business.

While there is no one-size-fits-all approach, taking a proactive and people-focused view can help organisations navigate hot weather more effectively and minimise disruption.

How hot weather can affect workplace performance

Anyone who has spent a day working in an uncomfortably warm office knows that concentration can quickly become a challenge.

As temperatures rise, employees may feel more fatigued, find it harder to focus or simply become less productive than they would under normal working conditions. Add in the distractions of summer activities and upcoming holidays, and it’s not unusual for engagement levels to dip.

Rather than expecting employees to perform exactly as they would on a cooler day, employers may find it more effective to make small adjustments that help teams remain comfortable and focused.

Simple measures such as improving ventilation, using fans, closing blinds and encouraging regular breaks can make a noticeable difference.

Some organisations may also choose to prioritise key tasks during particularly warm periods, adjust workloads where appropriate or introduce small morale-boosting initiatives to help maintain motivation.

In some workplaces, even minor changes to the working day, such as holding informal meetings or allowing employees to work from a different area of the office, can help people reset and maintain concentration.

Managing sickness absence during hot weather

Many employers report seeing an increase in short-term absence during periods of particularly warm weather.

While it’s important not to jump to conclusions, managers should remain alert to any recurring patterns, particularly where absences consistently coincide with hot weather or weekends.

The most effective approach is usually the same one that applies throughout the rest of the year: consistency.

Employers should ensure absence management procedures are followed fairly, return-to-work meetings are carried out after each period of absence and communication remains open and constructive.

A workplace culture that promotes engagement and trust can also play an important role. Employees who feel valued and connected to their organisation are generally less likely to misuse absence arrangements.

Where operationally possible, temporary flexibility such as adjusted working hours or occasional homeworking may also help reduce unauthorised absence during periods of extreme heat.

When an absence raises concerns

If there are genuine reasons to question an absence, employers should take a measured approach.

Look for patterns or evidence before making assumptions, discuss any concerns professionally during return-to-work conversations and give employees an opportunity to explain the circumstances.

Where evidence suggests misconduct may have occurred, organisations should follow their normal disciplinary procedures and ensure any action taken is fair and proportionate.

Hot weather and workplace dress codes

Dress code questions tend to become more common whenever temperatures rise.

Employees naturally want to feel comfortable, and some may ask whether existing workplace standards can be relaxed during warmer periods.

While employers are not legally required to amend dress codes during hot weather, many organisations choose to introduce temporary adjustments where appropriate.

The key is ensuring any expectations remain suitable for the working environment, particularly where employees interact with customers or work in safety-critical roles.

If changes are made, employers should clearly communicate what is acceptable and ensure standards are applied consistently across the workforce.

In most situations, concerns around clothing choices can be resolved through a straightforward conversation rather than formal action.

Avoiding discrimination risks

When reviewing dress code expectations, employers should also be mindful of potential discrimination risks.

Dress standards do not need to be identical for every employee group, but they should be equivalent in overall standard and applied fairly.

Organisations should avoid creating situations where one group is given significantly greater flexibility than another without a legitimate reason.

Focusing on professional appearance and suitability for the role, rather than prescribing specific clothing items, often provides a more balanced approach.

Responding to requests for greater flexibility

Hot weather can often prompt requests for temporary flexibility.

Employees may ask to start earlier, finish earlier or work from home for a short period while temperatures remain high.

These requests are often informal and differ from formal flexible working applications.

Although employers are under no automatic obligation to agree, considering requests pragmatically can often benefit both parties.

Temporary flexibility may help employees remain comfortable, improve concentration and reduce the likelihood of short-term absence. It can also demonstrate that managers are responsive to employee needs and willing to take a practical approach when circumstances change.

Where temporary arrangements are agreed, they should be communicated clearly, applied consistently and reviewed regularly to ensure they continue to meet business needs.

Taking a practical, people-focused approach

Hot weather can put pressure on workplace policies, management decisions and day-to-day operations.

The organisations that tend to navigate these challenges most successfully are those that focus on practical solutions, clear communication and employee wellbeing.

By planning ahead and being willing to make reasonable adjustments where appropriate, employers can help their people remain comfortable and productive while reducing potential risks to attendance, performance and workplace safety.

After all, managing people effectively during a heatwave isn’t about having a separate set of rules for summer. It’s about applying good people management principles in a way that reflects the circumstances your employees are experiencing.

If you’re reviewing workplace policies, considering temporary adjustments or looking for advice on managing people issues consistently and fairly during periods of hot weather, the Vero HR team is here to help. Get in touch to find out how we can support your business.