Argyll and Loch Lomond
Sunday 30 August 2026 · The Arrochar Alps, Crianlarich and Argyll hills
Why: Thunderstorm timing is inherently uncertain and may shift by several hours.
Thunderstorms are the main concern, especially on exposed summits and ridges. Light southeasterly wind and Persistent rain.
High-ground wind (900 m)
Southeasterly around 10 mph at 900 m. Gusts reaching around 15 mph at 900 m, with locally higher values possible on the most exposed tops. Temporarily strongest around midday, near 10 mph.
Walking impact
Little effect on walking, although exposed tops may still feel chilly.
Thunderstorms
A moderate thunderstorm risk is indicated from the morning into the evening. Avoid committing to exposed summits or ridges while storms are building or nearby.
Spate risk
High spate risk based on forecast rainfall. Burns and unbridged crossings may become difficult or impassable. The heaviest rain is expected around the middle of the day. Crossing risk is expected throughout the day, continuing overnight and easing after around 03:00 the following morning. Turn back if a crossing looks unsafe.
Rain and showers
Persistent rain for much of the day. The heaviest rain is expected around the middle of the day.
Cloud-free summits
Around 20%.
Cloud and visibility
Cloud bases mostly around 400-1200 m. Bases should tend to lift as the day goes on. Most higher summits are likely to be in cloud for much of the day, with only brief or isolated breaks.
Temperature and wind chill
Around 9°C at 900 m, feeling like 7°C in the wind.
Freezing level
Above the summits.
Daylight
Sunrise 06:17 — Sunset 20:20 — about 14.1 hours daylight.
Overnight · 6 p.m.–9 a.m.Wild campingBetaThunder risk is around 44% in parts of the area; avoid exposed pitches if storms develop. 39/100Poor · 600 m View detailsHide details
Full regional overnight outlook
Across representative hills, open-hillside camping looks poor around 600 m (39/100). A wet night is likely, with around 17 mm indicated between pitching and packing up.
Elevation reference (open ground)
- Wind / gust
- 5 / 11 mph
- Coldest
- 11.8°C
- In cloud
- Unlikely
- Condensation
- High
- Wind / gust
- 5 / 13 mph
- Coldest
- 10.9°C
- In cloud
- 56% of night
- Condensation
- High
- Wind / gust
- 6 / 15 mph
- Coldest
- 9.0°C
- In cloud
- 56% of night
- Condensation
- High
Open-hillside guidance across representative hills. Local shelter, ridges, tent design and the exact pitch can change conditions substantially. How to use the wild-camping forecast.
Daytime · exposed rockClimbing & scramblingBetaThunder risk is around 38% in parts of the area; exposed scrambling may be a poor choice. 19/100Poor · Very poor View detailsHide details
Full regional climbing & scrambling outlook
Conditions for exposed scrambling across the area look very poor (19/100). Rain is likely to leave rock wet; polished slabs, vegetation and drainage lines may be notably worse. Mapped summit-point geology across the representative hills includes psammite, pelite or semipelite, granite, gneiss or gabbro and volcanic rock; moisture response can therefore vary substantially between crags and routes.
Representative summit-point samples across the region; individual crags and routes may differ.
Generic exposed hands-on-rock terrain across representative summits; mapped summit-point geology is a broad regional sample, not a named-route survey. Contains British Geological Survey materials © UKRI 2026. How to use the climbing and scrambling forecast.
Updated 30 August 2026 at 04:40 UTC. See typical weekly and monthly conditions for Argyll and Loch Lomond.