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Staying Safe in the Sun with Diabetes
Warm weather is a great time to get outside and enjoy yourself. If you have diabetes, it just means taking a few extra steps to stay safe. Hot temperatures can affect both your blood sugar levels and how your body responds to insulin, so it’s important to be prepared.
How heat can affect blood sugar
Hot weather can affect your diabetes in different ways:
- Higher blood sugar levels: Relaxing in the sun often means less activity, which can cause your levels to rise.
- Lower blood sugar (hypos): Heat can make insulin absorb faster into your body, increasing the risk of low blood sugar.
Top tips for managing diabetes in hot weather
1. Check Your Blood Sugar More Often
- Test your levels more frequently, as heat can cause them to change quickly.
- Be ready to adjust your food or medication if needed.
- If you’re planning to be active (like swimming or walking), have a snack beforehand and carry something sugary with you in case of a hypo.
2. Keep Medication and Equipment Cool
- Insulin: Store insulin in the fridge where possible, or use a cool bag when you’re out. Do not use it if it looks unusual (for example, cloudy when it should be clear, or grainy).
- Glucose meters and test strips: Keep them out of direct sunlight and at room temperature. Avoid putting them in the fridge.
- Pumps and sensors: Make sure your skin is clean and free from sunscreen before applying. Keep devices covered when in the sun.
3. Stay Hydrated
- Drink plenty of water or sugar-free drinks.
- Try to avoid alcohol and too much caffeine.
- Pale yellow urine is a good sign you are well hydrated.
Dehydration can be more serious if you have diabetes, so drinking enough fluids is very important.
4. Look After Your Feet
- Avoid walking barefoot, especially on hot surfaces.
- Wear well-fitting shoes or sandals.
- Check your feet regularly, particularly if you have reduced sensation.
5. Know the Warning Signs
Symptoms of heat exhaustion (such as dizziness, headache, nausea, or sweating) can feel similar to changes in blood sugar levels.
- If you feel unwell, check your blood sugar.
- If it’s heat-related, move to a cooler place, rest, and drink water.
- Seek urgent medical help if symptoms worsen.
Enjoy the summer safely
Spending time outdoors and staying active is great for both your physical and mental health. With a bit of extra care—such as staying in the shade during the hottest part of the day (11am to 3pm), keeping cool, and checking your levels - you can enjoy the summer safely.
For more tailored guidance or real-life support stories, visit the Diabetes UK website.
Published: Jun 24, 2026