Tromsø sits at roughly 67° magnetic latitude, well inside the auroral oval, where even a mild Kp index reading can put a visible arc on the northern horizon. That is the reason almost every serious aurora itinerary in Norway starts here rather than further south. The city itself sits under light-polluted, city-centre skies, a suburban glow that hides all but the brightest displays, but you do not have to travel far to change that: thirty minutes gets you to Bortle 3-4, and ninety minutes gets you to Bortle 2.
The seven spots below are ranked for how well they turn that gradient into a real evening out, weighing sky darkness against how easily you can actually reach them. Some need nothing more than a city bus and a fixed return time. Others need a rental car, studded winter tyres, and a willingness to reposition when cloud moves in. Aurora season runs late September through late March, with October through February offering the longest dark windows and, in most years, the best odds against cloud.