UV Index
UV Index
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Today's UV index in Portsmouth, United Kingdom 
will be up to 0.7, indicating low risk of harm from the sun's UV rays for the average person. Check our tips for today to make sure you're safe in the sun.
Today, the UV index suggests low sun danger (0-2) in Portsmouth, reaching up to 0.7. Remember sunglasses and SPF 30+ on sunny days, and be cautious around reflective surfaces like sand, water, and snow for increased UV exposure.
Read more here about the climate and sun exposure in and around Portsmouth.
The UV index in Portsmouth, United Kingdom varies throughout the year. In summer months like July and August, the UV index reaches higher levels, typically ranging from 6 to 8 (high to very high). It is advisable to protect your skin by wearing sunscreen, a hat, and sunglasses to reduce the risk of sunburn and skin damage.
Portsmouth experiences distinct weather seasons. During winter months from December to February, temperatures can drop to an average of 4-8 °C (39-46 °F). Spring and autumn bring milder weather, with temperatures ranging from 10-15 °C (50-59 °F). Summers are relatively warm, with temperatures averaging around 18-22 °C (64-72 °F). However, weather patterns can be unpredictable, so it is wise to be prepared for changes in temperature and bring appropriate clothing when visiting.
Compared to surrounding regions, Portsmouth enjoys a moderate climate due to its coastal location. While it receives mild winters and relatively warm summers like the rest of southern England, its proximity to the sea brings lower temperature extremes. Additionally, the city experiences a slightly higher amount of sunshine throughout the year, providing locals and visitors with ample opportunities to enjoy outdoor activities and explore the beautiful coastline.
The chart above displays the Shortwave Radiation Sum (MJ/m²) for each day of the last year in Portsmouth. It's designed to provide you with a better understanding of the yearly weather and sun exposure.