When to walk the GR 10 (Hendaye → Banyuls‑sur‑Mer)

The GR 10, the Grande Traversée des Pyrénées, crosses a long mountain chain where weather flips with both coast and altitude. For most walkers, starting in April to May, or late August to September gives the best conditions on the GR 10: cooler air, steadier days, and fewer heat‑and‑thunder hassles than high summer. Expect the Atlantic west to be cloudier and wetter, the Mediterranean east drier and sunnier, and the high cols to stay a grade colder than the valleys.

April–May: Spring window (best if you like cool, lively mountains)

• Why it’s good: Fresh temperatures, long daylight, blooming valleys, and (especially toward the Mediterranean) more frequent bright spells.
• What to expect: Regular showers in the west, clearer breaks between fronts, and the odd burst of heavier rain. Higher passes can keep snowfields and may even see a fresh dusting during cold snaps.
• How to plan: Build in flexibility for detours or a shorter stage over the big cols, and carry warm layers for chilly mornings. The farther east you go, the more settled it tends to feel.

Late August–September: Late‑summer into early autumn (best all‑round bet)

• Why it’s good: Heat eases, afternoon storms calm down, and air feels clearer. The east is often pleasantly dry and sunny; the west still sees passing showers but with longer bright windows.
• What to expect: Comfortable walking temperatures, cool nights at altitude, and occasionally a lively front rolling through. By late September, the highest ground can catch an early flurry.
• How to plan: Start early for calm mornings, keep an eye on fronts in the Atlantic half, and pack an extra layer for crisp evenings.

June to mid‑August: Usable, but hotter and more thundery

• Pros: Long days and open trails; snow has retreated from most cols by late June.
• Cons: Humidity and cloud build‑ups in the west, hot valleys toward the east, and frequent passing showers or short thunderstorms on the high ground.
• Tips: Early starts, generous water stops, and flexible stage lengths help. Expect mixed sun‑and‑shower days rather than wall‑to‑wall blue.

October to March: Often wintry, better for short lower sections

• What it’s like: Frequent Atlantic systems, plenty of cloud and rain in the west, and regular snow on the higher chain from November through spring. Clear windows do occur but are short.
• Takeaway: Feels like a mountaineer’s season on the crests rather than a full thru‑hiking window. If you go, pick lower stretches and be ready for cold, wet, and windy days.

Of course, while these recommendations provide a solid starting point, everyone's preferences and circumstances are unique. For example, if you prefer walking in the cooler morning hours to avoid midday heat, you might prioritize dates with drier conditions. On the other hand, if you are more accustomed to colder climates, you may choose to avoid hotter periods - even if it means encountering more rain. Our search tool allows you to customize your journey to align with your specific needs and preferences, ensuring the best possible experience on the trail.

Furthermore, if your plan differs from walking the standard stages from Hendaye to Banyuls-sur-Mer, then you can edit the Search Settings below accordingly.