June to early September on the Atlantic coast. July and August are warmest and most settled; late August gives you dark evenings again, quieter roads and the first autumn colour.
Effectively endless in June; still around fifteen hours in late August, when darkness returns and the sky gets colour again.
Atlantic weather crosses the coast in bands. The wind can turn within a day — check the forecast each morning rather than the week.
Sealed throughout, with exposed bridge and causeway sections where crosswind matters more than gradient.
Bare rock, bridges over open water, and weather that changes its mind.
The full route
GPX files, offline maps, the elevation profile, day-by-day notes and the planning tools for The Atlantic Road North all live on BicycleMovement. We keep only the season and the reason.
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Quiet routes in EuropeHow we read the seasonThis month's ten