Portugal will experience a total solar eclipse on August 12, 2026, marking the first time the phenomenon has been visible from the country’s mainland since 1912. Retailer Aldi has begun stocking ISO 12312-2 certified solar eclipse glasses for €0.99, providing a necessary safety measure for observers as demand for protective eyewear is expected to surge ahead of the event.
Why is the 2026 solar eclipse significant for Portugal?
The total solar eclipse on August 12, 2026, represents a rare astronomical event for the Iberian Peninsula. According to reporting on the event, the “path of totality”—the area where the Moon completely obscures the Sun—will cross the Arctic, Greenland, Iceland, and northern Spain, clipping the extreme northeast of Portugal near Bragança.
This event serves as the first total solar eclipse visible from continental Europe since 1999. For Portugal specifically, it is a once-in-a-generation occurrence, as the next total solar eclipse visible from the mainland is not projected to occur until 2144.
How much of the eclipse will be visible outside the path of totality?
Observers located outside the specific path of totality will still experience a significant partial eclipse. Data indicates that across almost all of mainland Portugal, the Moon will obscure between 92% and 99% of the Sun’s disk. In Lisbon, for example, approximately 94% of the Sun will be covered.
The maximum obscuration is expected to occur in the late afternoon, between 19:30 and 20:00. Because the Sun will be low on the horizon, observers may witness unique visual conditions compared to typical midday eclipses.
Why is ISO 12312-2 certification essential for eclipse glasses?
Looking directly at the Sun without specialized protection can cause permanent, irreversible eye damage within seconds, even during a partial eclipse. According to safety standards, standard sunglasses—regardless of how dark they appear—are insufficient because they fail to filter the radiation and give a false sense of security.
The glasses sold by Aldi are certified under the EN ISO 12312-2:2015 standard. This certification confirms the lenses are specifically engineered for direct solar observation.
What are the expected trends for eclipse safety gear?
Demand for certified eyewear typically spikes in the weeks leading up to such events. Similar past events in other countries have shown that supplies of certified glasses often sell out quickly, leading to price surges in secondary online markets. These secondary markets frequently feature counterfeit products that lack the required safety certifications, posing a significant risk to consumers.
Frequently Asked Questions
- Can I use regular sunglasses to watch the eclipse? No. Standard sunglasses do not provide the necessary protection to prevent permanent eye damage.
- What does the ISO 12312-2 standard mean? It is the safety standard for filters used in direct solar observation, ensuring they are designed for solar observation.
- When is the next total solar eclipse in Portugal after 2026? Based on current astronomical projections, the next total solar eclipse visible from mainland Portugal is not expected until the year 2144.
Are you planning to travel to the path of totality in Bragança, or will you be watching the partial eclipse from your local area? Share your plans in the comments below or subscribe to our newsletter for more updates on the upcoming “golden era” of Iberian eclipses.
