On 12 August 2026 in Sevilla (Andalucía) the eclipse will be partial: the Moon covers up to 94.6% of the Sun's disc around 20:37:31 (Spanish peninsular time). There will be a noticeable dimming, but not total darkness.
Because it happens right before sunset, the Sun will be very low (7.4°). That's why what matters is not just being in the right place, but having the west-northwest horizon clear of hills and buildings.
Data computed for the coordinates of Sevilla (37.3891, -5.9845). Verify with the IGN (Spain) before travelling.