Adarra Mountain
Basque Country mountain with scenic hiking routes
Adarra, a mountain near San Sebastián, draws hikers to ridges and paths with views over Gipuzkoa's countryside and the Bay of Biscay.
Adarra at a Glance#
Hours: Open year-round
Admission: Free (no standard admission)
Tips for Visiting Adarra#
- Start early on weekdays to beat the busiest stretches of local hikers from nearby towns - mornings usually offer clearer views and fewer people on the ridgeline.
- Look for clear days: from the summit you can often see stretches of the Gipuzkoa coastline and surrounding Basque hills that many day-trippers miss, so time the climb for good visibility.
Best Time to Visit Adarra#
Best visited from late spring through early autumn (May-September) for the most comfortable hiking weather and clear views.
Late spring to early autumn
May-September · 10-25°C
Best time for hiking and panoramic views-warmer, drier days and long daylight.
Winter
December-February · 5-12°C
Cooler and wetter; trails can be muddy and visibility limited on bad-weather days.
Weather & Climate near Adarra#
Climate
Adarra's climate is classified as Oceanic - Oceanic climate with mild summers (peaking in August) and cold winters (coldest in January). Temperatures range from 2°C to 22°C. Abundant rainfall (1286 mm/year), wettest in November.
Air Quality:
AQI 35
Good
Best Time to Visit
AugustJulySeptember
Temperature & Rainfall
Temperature Range
38°
Warmest Month
-9°
Coldest Month
Monthly Conditions
| Month | Comfort | Temp | Feels | Rain | Sky | Humidity | Wind | UV | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | Poor | 2° - 8° | 2° | 125 mm | overcast | 90% | 4.3 m/s | 0.2 low | 9.2h |
| February | Acceptable | 3° - 9° | 3° | 106 mm | overcast | 86% | 4.4 m/s | 0.3 low | 10.3h |
| March | Acceptable | 3° - 11° | 4° | 97 mm | overcast | 82% | 4.3 m/s | 0.7 moderate | 11.8h |
| April | Poor | 4° - 12° | 5° | 129 mm | overcast | 81% | 4.5 m/s | 1.1 high | 13.3h |
| May | Good | 7° - 16° | 11° | 120 mm | overcast | 80% | 4.0 m/s | 1.4 high | 14.5h |
| June | Good | 10° - 18° | 14° | 85 mm | partly cloudy | 78% | 3.8 m/s | 1.7 very high | 15.2h |
| July | Very Good | 13° - 22° | 17° | 72 mm | partly cloudy | 77% | 3.6 m/s | 1.8 very high | 14.9h |
| August | Very Good | 13° - 22° | 18° | 86 mm | partly cloudy | 75% | 3.5 m/s | 1.5 very high | 13.8h |
| September | Good | 12° - 20° | 16° | 86 mm | partly cloudy | 76% | 3.5 m/s | 1.1 high | 12.4h |
| October | Good | 9° - 16° | 12° | 121 mm | partly cloudy | 80% | 4.1 m/s | 0.6 moderate | 10.9h |
| November | Poor | 5° - 12° | 6° | 136 mm | overcast | 87% | 4.2 m/s | 0.2 low | 9.5h |
| December | Acceptable | 4° - 9° | 3° | 123 mm | overcast | 89% | 4.5 m/s | 0.1 low | 8.8h |