Keeping Hamsters Cool in Hot Weather

Q: What temperature is too hot for a hamster?

Hamsters are generally most comfortable between 18°C and 24°C. Temperatures above this range can increase the risk of overheating, especially if cooling measures are not provided. Extra precautions should be taken during heatwaves and periods of prolonged hot weather.

June 23, 2026

During hot weather, help keep your hamster cool by:

Using chilled ceramic items, sand baths and coco soil
Providing fresh water twice daily
Offering small pieces of hydrating vegetables
Keeping the enclosure out of direct sunlight
Maintaining good airflow
Providing deep bedding for cooler burrows

Increased burrowing and changes in sleeping patterns can be normal responses to warmer temperatures.

Hamsters are very sensitive to high temperatures, making it important to help them stay cool during warm weather. The ideal temperature range for most pet hamsters is generally between 18°C and 24°C. Once temperatures begin to climb above this range, hamsters can become uncomfortable and may be at risk of overheating.

Fortunately, there are several simple steps you can take to help keep your hamster comfortable during warmer days. From providing cool resting areas to ensuring fresh water and good airflow, small changes can make a big difference to your hamster's wellbeing.

Top Tip: If your room temperature regularly exceeds 24°C during hot weather, take extra precautions to provide cooling options and closely monitor your hamster's comfort.

Use Chilled Cooling Items

Ceramic hides, sand baths and coco soil can all be placed in the fridge for a short time before being returned to the enclosure. These provide cool areas for your hamster to rest and help regulate their temperature.

Adding extra ceramic hides during hot weather is also a great idea. Even simple ceramic kitchen tiles can provide a cool surface for your hamster to lie on.

Roborovski hamster in ceramic hide

Chilled ceramic items and sand baths can provide cool resting spots during warm weather.

Keep Water Fresh

Change your hamster's water at least twice a day to help keep it cool and fresh. Avoid adding ice directly to the water, as sudden temperature changes are not recommended.

Syrian hamster with water bowl

Offer fresh water and consider multiple water sources during hot weather.

Providing multiple water sources, such as a bottle and a bowl where appropriate, can help ensure your hamster always has access to water.

Water Bottle Holder Water Bottle Holder for Bucatstate RoseLark Pet Products

Offer Hydrating Foods

Small ear-sized pieces of cucumber and leafy greens can help support hydration during warmer weather. These should be offered as part of a balanced diet and not replace their regular food.

syrian hamster with spinach leaf

Hydrating foods such as cucumber and leafy greens can help support hydration.

Manage the Room Temperature

Keep blinds or curtains closed during the hottest parts of the day and ensure the enclosure is never placed in direct sunlight.

A fan can be used to circulate air around the room, but it should never be pointed directly at the enclosure. Good ventilation and airflow can help keep the room cooler and more comfortable.

Keep Bedding Deep

Deep bedding can help your hamster stay cool during warm weather. The lower layers of bedding are often cooler than the surrounding room, allowing your hamster to create comfortable burrows away from the heat.

Make sure your hamster has plenty of bedding available so they can dig and adjust their burrows as needed. You may notice your hamster spending more time underground during hot weather, which is completely normal.

hamster burrow asleep

Burrows often remain cooler than the surrounding environment.

Understand Normal Behaviour Changes

It is normal for sleeping patterns to change during periods of warmer weather. Your hamster may become active at different times while adapting to the temperature.

As long as your hamster is eating, drinking and behaving normally otherwise, changes in activity patterns can simply be their way of coping with warmer conditions.

Signs Your Hamster May Be Too Hot

If your hamster becomes overheated, they may show signs such as:

Spreading out flat on a cool surface for long periods
Rapid or heavy breathing
Lethargy or reduced activity
Difficulty moving normally
Loss of appetite

If you are concerned that your hamster may be suffering from heat stress or heatstroke, contact an exotic or small animal veterinarian immediately.

Keeping Your Hamster Comfortable

By providing cool resting areas, fresh water, deep bedding and good airflow, you can help your hamster stay comfortable throughout the warmer months while supporting their natural behaviours.

Frequently Asked Questions about Keeping Hamsters Cool During Hot Weather

What temperature is too hot for a hamster?

Hamsters are generally most comfortable between 18°C and 24°C. Temperatures above this range can increase the risk of overheating, especially if cooling measures are not provided. Extra precautions should be taken during heatwaves and periods of prolonged hot weather.

Can I put a hamster's sand bath in the fridge?

Yes. Hamster-safe sand, ceramic hides and coco soil can be placed in the fridge for a short period before being returned to the enclosure. This creates cool resting areas that can help your hamster stay comfortable during warmer weather.

Should I put ice in my hamster's water bottle?

No. Ice should not be added directly to your hamster's water. Instead, provide fresh cool water and change it at least twice daily. Offering multiple water sources can also help ensure your hamster always has access to water.

What foods can help keep a hamster hydrated in hot weather?

Small ear-sized pieces of cucumber and leafy greens can help support hydration during hot weather. These should be offered in moderation as part of a balanced diet alongside your hamster's normal food.

Is it normal for my hamster to sleep more during hot weather?

Yes. Many hamsters adjust their sleeping and activity patterns when temperatures rise. They may become active later in the evening, spend more time in burrows or rest for longer periods during the warmest parts of the day.

Why is deep bedding important during hot weather?

Deep bedding allows hamsters to create burrows where temperatures are often cooler than the surface. Providing plenty of bedding helps your hamster regulate their temperature naturally and can make a significant difference during warm weather.