Every dot is a real spot you could stand at to watch the total solar eclipse of 12 August 2026, when the Moon's shadow crosses northern Spain and the Balearics at sunset. The color rates how good the view is likely to be — green is better, red/orange is worse.
Weather is not in the base color. Tick “Shade by cloud climatology” to also factor in the typical chance of a clear sky in mid-August. That figure is a long-term seasonal average per climate region — not a weather forecast (a real forecast only becomes meaningful about a week out). Because it's regional, its boundaries can look like straight lines, and it can differ from finer cloud maps such as eclipsophile.com.
Either there are no mapped viewpoints there, or the terrain blocks the low western sun — common on the meseta, where mountains to the west hide the sunset unless you're on high ground.
Dots come from OpenStreetMap (peaks, viewpoints, passes, etc.), then filtered by terrain visibility — so they're denser where there are more mapped, unobstructed vantage points.