UV Index
UV Index
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Today's UV index in Portsmouth, United Kingdom 
will be up to 4.7, indicating a moderate level of sun exposure for the average person. Check the annual sun radiation in the city and our tips for today to make sure you're safe in the sun.
With a UV index reaching up to 4.7 in Portsmouth, stay shaded during midday when the sun is strongest; wear protective clothing, a wide-brimmed hat, UV-blocking sunglasses; apply SPF 30+ sunscreen every 2 hours, even on cloudy days; and be cautious of heightened UV on bright surfaces.
The UV index in Portsmouth, UK, is generally low due to its location in the northern hemisphere. The highest UV index is experienced during the summer months, but it rarely goes above 6, which is considered moderate.
Portsmouth experiences four distinct seasons. Spring (March to May) is mild and often wet, while summers (June to August) are typically cool and damp, with temperatures rarely exceeding 25°C. Autumn (September to November) is usually crisp and cool, and winters (December to February) are often cold and damp, with occasional snowfall.
Compared to its region and neighboring countries, Portsmouth is relatively mild due to its coastal location. It experiences less rainfall and cooler temperatures than northern parts of the UK, and warmer winters than many parts of continental Europe. However, it can be windier than inland areas and its neighboring countries, due to its coastal position.
The chart below displays the average Shortwave Radiation Sum (MJ/m²) for each month of the last year in Portsmouth. It's designed to provide you with a better understanding of the yearly weather and sun exposure.