Castellar del Vallès
41.617°, 2.083° · 299 m a.s.l.
Marginal
Partial eclipse · 99.6% obscuration
Marginal: only 0.13° between the Sun and the local skyline at peak.
45/100Marginal
99.6%
Partial eclipse · 99.6% obscuration
See the eclipse from Castellar del Vallès minute by minute
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Photo: CC BY-SA 3.0 · Wikimedia Commons
About Castellar del Vallès
Castellar del Vallès is a municipality in the Vallès Occidental region, in the province of Barcelona, within the autonomous community of Catalonia. It sits at 299 metres altitude, on the foothills of the Sant Llorenç del Munt massif, northwest of the Barcelona metropolitan area. With nearly 24,000 inhabitants, the town combines a consolidated urban core with extensive forested areas, sheltered by the natural parks that surround it to the north and west.
For this eclipse
On 12 August 2026, Castellar del Vallès will experience a partial solar eclipse with its maximum occurring at 20:28 local time. At that moment, the Sun will be just 4.1° above the horizon, with an azimuth of 286°, corresponding to an almost pure west-northwest direction. The margin between the Sun's altitude and the local topographic horizon is only 0.1°, so any obstruction in that direction—trees, buildings, or terrain—can block the view.
The weather in August
According to AEMET data for the 1991-2020 period, August is the warmest month of the year in Castellar del Vallès: average temperature 24.3 °C, highs reaching 30.3 °C and lows of 18.1 °C. Average monthly precipitation stands at 44.7 mm, with a storm risk classified as high. August afternoons often see the development of cumulonimbus clouds over the nearby massifs, so the evolution of the sky in the hours before the eclipse will be decisive for observing conditions.
Past eclipses
The last total eclipse visible from Castellar del Vallès occurred on 8 July 1842, 184 years ago, with a totality phase of barely 59 seconds. Decades later, on 11 November 1901, an annular eclipse covered just over 82% of the solar disc with an annular duration of 4 minutes and 24 seconds. After the eclipses of the 2026-2028 cycle, the next significant annular eclipse over this area will not occur until 13 July 2075.
Direction and altitude of the Sun
At the moment of maximum eclipse, the Sun will occupy an azimuth of 286° and an altitude of 4.1° above the horizon. This position corresponds to looking toward the west-northwest, almost in the direction of sunset with a slight inclination to the north. Given that the Sun will be so close to the horizon, it is advisable to find a location with clear horizon toward that direction—without tree canopies, rooftops, or terrain elevations blocking the last few degrees above the horizon line.
Editorial text by eclipses.app · Data: Wikidata, AEMET, NASA and astronomy-engine.
Eclipse schedule in Castellar del Vallès
| Phase | UTC | Local time | Sun alt. | Sun az. |
|---|---|---|---|---|
| C1 — Partial begins | 17:34 UTC | 19:34 | +13.9° | 277.6° |
| Maximum | 18:28 UTC | 20:28 | +4.1° | 286.3° |
| C4 — Partial ends | 19:19 UTC | 21:19 | -4.4° | 294.9° |
Sun direction and altitude at C4
Look toward WNW (294.9°)
Azimuth at C4
294.9° WNW
Sun altitude at C4
-4.40°
Terrain horizon
4.24°
Sun−terrain margin
-0.13°
What the contact points (C1-C4) mean
A solar eclipse is described by four key moments, the contact points between the discs of the Sun and the Moon:
- C1First contact: the Moon touches the edge of the Sun and the partial eclipse begins.
- C2Second contact: the Moon fully covers the Sun and totality begins.
- C3Third contact: the Sun reappears and totality ends.
- C4Fourth contact: the Moon leaves the Sun's disc and the eclipse ends.
Where the eclipse is only partial, the Moon never fully covers the Sun: only C1 and C4 occur, with no totality in between.
Peaks near Castellar del Vallès
| Peak | Elevation | Distance | Azimuth |
|---|---|---|---|
| Sant Jeroni | 1237.6 m | 22.6 km | 267° W |
| l'Eco Superior | 1223.1 m | 23.0 km | 267° W |
| Miranda dels Ecos | 1222.7 m | 23.1 km | 267° W |
| Eco d'en Nubiola | 1219.3 m | 23.1 km | 267° W |
| Agulla Lluís Estasen | 1209 m | 23.1 km | 267° W |
| el Moro | 1206.2 m | 22.3 km | 266° W |
| Eco Occidental | 1200.2 m | 23.1 km | 267° W |
| Roca 311 | 1197.5 m | 22.7 km | 267° W |
Weather in Castellar del Vallès in August
Avg. temp.
24.3°C
Max / min
30.3° / 18.1°
Precipitation
44.7 mm
Storm risk
High
Station CALDES DE MONTBUI, 7 km away · Period 1991-2020 · Source: AEMET
Historical cloud cover
P25 — clearer days
5%
Median cloud cover
16%
P75 — cloudier days
35%
Source: ERA5 (ECMWF), 10-year average at the eclipse hour.
Other eclipses seen from Castellar del Vallès
- Last total eclipseJuly 8, 1842184 years ago
- Last annular eclipseNovember 11, 1901125 years ago
- Next annular eclipseJuly 13, 2075
Solar eclipses computed from astronomical ephemerides for the city's coordinates.
Frequently asked questions about the eclipse in Castellar del Vallès
Will the eclipse of August 12, 2026 be visible from Castellar del Vallès?
Yes, but marginally: with 99.6% obscuration, the topographic horizon from Castellar del Vallès is very close to the Sun's altitude at the end.
What time is the eclipse maximum in Castellar del Vallès?
Maximum occurs at 20:28 local time (18:28 UTC) in Castellar del Vallès.
Which direction to look to watch the eclipse from Castellar del Vallès?
Look WNW (azimuth 286°); the Sun will be 4° above the horizon at maximum from Castellar del Vallès.
Is Castellar del Vallès a good place to watch the eclipse?
Castellar del Vallès can see the eclipse with limitations (score 45/100): terrain, geometry, or climatology add risk. Consider moving to a higher-scored viewpoint.
Do I need special glasses to watch the eclipse?
Yes, you need ISO 12312-2 certified eclipse glasses during every partial phase. Regular sunglasses do NOT protect. Glasses can only be removed during the totality phase (when the Sun is fully covered); never during annular or partial eclipses. Pages flagged "visible" assume a clear horizon, not a viewing recommendation.
Nearby cities
All cities in Catalonia →Where to stay in Castellar del Vallès
For the August 12 eclipse. Recommended stay: Aug 10–14, 2026.
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