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Live forecasts update automatically; written guidance last reviewed 16 June 2026 by the WordPatch weather desk. Data from national met services via Open-Meteo.
Live data from Open-Meteo · updates automatically ·
Arran’s weather is famously changeable, often bringing four seasons in one day, so the best time to visit for reliable warmth is May to September, though you should always pack for rain and wind regardless of the live forecast above.
What is the weather like on Arran month by month?
Spring (March–May) sees temperatures from 6–13°C, with increasing daylight and frequent showers. Summer (June–August) is the mildest and busiest period, averaging 14–18°C, but cloud and drizzle can still roll in from the Atlantic. Autumn (September–November) cools to 7–13°C, with October often the wettest. Winter (December–February) is cold and windy, with highs around 5–8°C and occasional snow on the higher peaks. For a detailed look at conditions across Scotland, see our Glasgow Weather page.
What should I pack for Arran?
Waterproof jacket and sturdy walking boots are essential year-round. In summer add layers and sun cream; in winter pack a warm hat, gloves and thermal base layers. Midges are active from May to September, so bring insect repellent. For a wider UK outlook, check the 10 Day Weather Forecast UK before you travel.
Frequently asked questions about Arran weather
Is the BBC Weather Arran forecast reliable?
Yes, the Met Office and BBC Weather provide reliable 14-day outlooks for Arran, though local topography means microclimates can shift quickly. Always check the live forecast above and the bbc weather arran 14 days page before planning hill walks.
What is the weather in the Isle of Arran 10 days from now?
For a medium-range view, consult the live forecast above or search for weather in isle of arran 10 days. Conditions typically remain unsettled, with showers and breezy intervals, so plan flexible itineraries.
When is the best time for a family holiday on Arran?
Late May to early September offers the warmest weather and longest days, but July and August coincide with Scottish school holidays, so book accommodation early. For quieter visits, consider June or early September.