Because the two hard parts — finding clear sky and nailing the settings under pressure — are handled for you. Every Golden Circle Day Tours departure checks the real-time vedur.is aurora and cloud forecast and drives 30-100 km from Reykjavik to a white (clear) patch, rather than hoping the lights appear over the city.
On the small-group minibus (max 19 guests) the guide helps set your camera or phone to the values above, you get free professional photos of your group under the aurora, plus hot chocolate and Icelandic snacks while you wait. Pickup from Reykjavik hotels is around 21:00, during the peak viewing hours of roughly 21:00-01:00. If the lights don't show, you get a free re-try — rebook any evening during your stay.
Solar Cycle 25 reached its maximum in October 2024 (NOAA), and the years around a solar maximum historically bring more frequent and stronger displays. Sightings are still never guaranteed; they need both solar activity and clear skies. Compare the three tour options or start at the Northern Lights hub.