Portsmouth is set to experience an exceptional warm spell this week, with temperatures expected to reach a peak of 30°C by Tuesday 26 May 2026. According to the Met Office, the city will see a steady increase in temperatures throughout the Bank Holiday weekend, rising from 23°C on Friday to 26°C on both Saturday and Sunday, and 28°C on Monday.
The Met Office advises that UV levels will remain high throughout the period. Residents are encouraged to seek shade during the middle of the day, cover up, and use sunscreen to protect themselves from the sun. Additionally, those with allergies should be aware that pollen levels will be high through Monday, increasing to very high by Tuesday.
While the weather will be warm, those heading to the coast should remain cautious. The Met Office has noted that sea surface temperatures around the UK remain cold, ranging between 9°C and 13°C, which can pose a risk of cold water shock for swimmers.
Across the country, the Met Office is forecasting temperatures to peak at 33°C in southern England and the Midlands on Monday. The UK Health Security Agency has issued amber heat health alerts for several regions in England, lasting until 27 May 2026, due to the potential impact on public health.
Looking ahead, the Met Office indicates that fine and warm weather is expected to continue for most of the country beyond the Bank Holiday. While temperatures may not reach the same highs seen at the start of the week, they are expected to remain above the seasonal average.
About this article: This story was put together with the help of AI tools and checked by a real person on our team. We're a small crew trying to cover as much of the UK as we can on a limited budget. We're getting better every day - but we're not perfect yet. If something looks off, let us know. You're part of the process.
