Castelldefels
41.278°, 1.970° · 14 m a.s.l.
Hidden by terrain
Partial eclipse · 99.9% obscuration
Local terrain rises 3.61° above the Sun at peak.
45/100Marginal
99.9%
Partial eclipse · 99.9% obscuration
See the eclipse from Castelldefels minute by minute
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Photo: Year of the dragon · CC BY-SA 3.0 · Wikimedia Commons
About Castelldefels
Castelldefels is a coastal municipality in the province of Barcelona, Catalonia, with approximately 66,000 inhabitants. It sits just 14 metres above sea level, nestled between the Garraf massif and the Mediterranean Sea. Its kilometres-long beaches and proximity to Barcelona—about 20 kilometres to the southwest—make it a city with a distinctly residential and tourist character within the metropolitan area.
For this eclipse
On 12 August 2026, Castelldefels will experience a partial solar eclipse with maximum at 20:29 local time. At that moment, the Sun will be just 4° above the horizon, and topographic horizon calculations indicate it will dip below the horizon line: the terrain will obstruct the view of maximum from ground level. Finding an elevated vantage point with a clear western to northwestern horizon will be essential to observe the phenomenon.
The weather in August
August is the sunniest month of the year in Castelldefels: AEMET's reference station (1991–2020 series) records an average of 272 hours of sunshine monthly and a 66% probability of clear skies. Temperatures are warm, averaging 25 °C, with highs around 29 °C and lows of 21 °C. The month's average precipitation is 51 mm, concentrated mainly in convective thunderstorms, with a moderate thunderstorm risk classification.
Past eclipses
The last total solar eclipse visible from Castelldefels occurred on 12 May 1706, 320 years ago, with a totality duration of 3 minutes and 55 seconds. More recently, on 11 November 1901, an annular eclipse reached 82% obscuration over the city. After the eclipses of 2026 and 2028, one must wait until 13 July 2075 for another annular eclipse to pass over Castelldefels.
Direction and altitude of the Sun
At the moment of maximum eclipse, at 20:29 on 12 August 2026, the Sun will be positioned at azimuth 286°—towards the west-northwest, very close to sunset. Its altitude above the geometric horizon will be just 4°, equivalent to less than four solar diameters above the horizon line. This low position means any obstacle—a building, hill, or trees—could completely block the view.
Editorial text by eclipses.app · Data: Wikidata, AEMET, NASA and astronomy-engine.
Eclipse schedule in Castelldefels
| Phase | UTC | Local time | Sun alt. | Sun az. |
|---|---|---|---|---|
| C1 — Partial begins | 17:35 UTC | 19:35 | +13.8° | 277.7° |
| Maximum | 18:29 UTC | 20:29 | +4.0° | 286.4° |
| C4 — Partial ends | 19:20 UTC | 21:20 | -4.6° | 294.9° |
Sun direction and altitude at C4
Look toward WNW (294.9°)
Azimuth at C4
294.9° WNW
Sun altitude at C4
-4.55°
Terrain horizon
7.62°
Sun−terrain margin
-3.61°
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 Castelldefels
| Peak | Elevation | Distance | Azimuth |
|---|---|---|---|
| Montau | 658 m | 10.4 km | 317° NW |
| Puig d'Agulles | 652.9 m | 16.1 km | 334° NNW |
| el Montcau | 645.8 m | 17.2 km | 329° NNW |
| Roc de Forellac | 628.9 m | 16.7 km | 333° NNW |
| Puig Saiada | 621 m | 10.3 km | 323° NW |
| Puig de l'Osca | 614.9 m | 13.3 km | 329° NNW |
| Puig Bernat | 612 m | 12.9 km | 325° NW |
| Pujol de Migjorn | 600.6 m | 17.6 km | 337° NNW |
Weather in Castelldefels in August
Avg. temp.
25.1°C
Max / min
28.9° / 21.3°
Precipitation
51.2 mm
Storm risk
Medium
Station BARCELONA AEROPUERTO, 9 km away · Period 1991-2020 · Source: AEMET
Historical cloud cover
P25 — clearer days
6%
Median cloud cover
10%
P75 — cloudier days
11%
Source: ERA5 (ECMWF), 10-year average at the eclipse hour.
Other eclipses seen from Castelldefels
- Last total eclipseMay 12, 1706320 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 Castelldefels
Will the eclipse of August 12, 2026 be visible from Castelldefels?
Geometrically yes (99.9% obscuration) but the local terrain blocks the Sun before the eclipse ends from Castelldefels.
What time is the eclipse maximum in Castelldefels?
Maximum occurs at 20:29 local time (18:29 UTC) in Castelldefels.
Which direction to look to watch the eclipse from Castelldefels?
Look WNW (azimuth 286°); the Sun will be 4° above the horizon at maximum from Castelldefels.
Is Castelldefels a good place to watch the eclipse?
Castelldefels is not the best choice: local terrain blocks the Sun before the eclipse ends. Consider a nearby viewpoint with a clear horizon.
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.
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