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Writer's pictureDr. Simon Luk

Do We Need to Use Sunscreen in Winter?




When we think of sunscreen, our minds often conjure up images of sunny beaches and hot summer days. However, the importance of sunscreen extends well beyond the warm months. Winter might not bring the heat, but it doesn’t mean you’re off the hook when it comes to sun protection. Here's why sunscreen remains essential even when the temperature drops, specifically in places like Adelaide.



The Persistent Threat of UV Radiation

Ultraviolet (UV) radiation from the sun is the main cause of skin damage, and it is present year-round. There are two types of UV radiation that impact our skin: UVA and UVB. UVA rays penetrate deeply into the skin, leading to premature aging and long-term damage. UVB rays, on the other hand, are responsible for sunburn. Both types can contribute to skin cancer.



Winter Conditions and UV Exposure in Adelaide

  1. Moderate Climate: Adelaide enjoys a Mediterranean climate, which means mild, wet winters. While it doesn't get extremely cold, the UV index can still be high, even on cooler days.

  2. Reflection off Surfaces: Even without snow, UV rays can reflect off various surfaces, such as water, sand, and buildings. This reflection can increase UV exposure, making sunscreen necessary even in urban environments.

  3. Cloud Cover: It’s a common misconception that cloudy days eliminate the need for sunscreen. Up to 80% of UV rays can penetrate through clouds, causing skin damage even when the sky is overcast. Adelaide experiences its fair share of cloudy days during winter, but this doesn’t reduce the need for sun protection.



Sun Protection in Winter

Given these factors, it’s clear that sunscreen is a year-round necessity. Dermatologists recommend using a broad-spectrum sunscreen with an SPF of at least 30, which protects against both UVA and UVB rays. Application should be generous and frequent, especially when spending extended periods outdoors.



The SunSmart App: Your Winter Sun Protection Guide

To make sun protection easier, consider using the SunSmart app. Developed by Cancer Council Victoria, this app provides real-time information on UV levels and sun protection times based on your location. Here’s how it can help:

  1. UV Alerts: The app provides daily UV alerts, notifying you when UV levels are high enough to require sun protection.

  2. Sun Protection Times: It offers specific sun protection times, indicating when sun protection is necessary during the day. This is particularly useful in winter when UV levels can fluctuate.

  3. Personalized Notifications: You can set up personalized notifications to remind you to apply sunscreen or take other sun protection measures at the right times.



Winter may bring cooler temperatures and shorter days, but the risk of UV damage remains. Using sunscreen during winter, especially when engaging in outdoor activities, is crucial for maintaining healthy skin and preventing long-term damage. The SunSmart app can be a valuable tool in ensuring you’re protected no matter the season. So, don’t stash away your sunscreen with your summer gear—keep it handy and stay sun safe all year long.

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