How are prayer times calculated for Portsmouth?
Portsmouth lies at a latitude of about 50.82°N, in Hampshire. Because prayer times depend on the position of the sun at a given location, the timings here are calculated specifically for these coordinates rather than borrowed from another town.
Today the sun rises at 07:43 and Maghrib falls at 17:52, giving 10h 8m between the two. As the year turns this daylight window lengthens and shortens, which is why Fajr (currently 05:53) and Isha (currently 19:36) shift gradually from week to week.
When praying in Portsmouth, the Qibla is faced towards the Kaaba in Makkah, which lies on a bearing of 117° from here, roughly to the south-east — a great-circle distance of about 4,817 km.
Prayer times in Portsmouth are very close to those in neighbouring towns, though they differ by a minute or two with distance. Nearby you can also check Southampton (24 km), Basingstoke (50 km) and Aldershot (53 km).