Ben Tirran weather forecast.

Forecast confidence: A low thunderstorm risk remains difficult to time precisely.

Cloud-free timing: Around 0% early, improving to around 40% later.

A mixed day on Ben Tirran: summit wind broadly 15-30 mph, with gusts 30-40 mph around midday (strong winds). Much calmer lower down - generally 5-15 mph in the valley, rising towards the tops. Cloud base around 500–800 m in the morning, then around 1000–1300 m around midday and 800–1100 m by late afternoon. The top is likely to drift in and out of cloud, with the best chance of a view from midday into the afternoon. Little or no rain expected.

Forecast confidence: Thunderstorm timing is inherently uncertain and may shift by several hours.

Cloud-free timing: Around 100% early, falling to around 0% later.

A mixed day on Ben Tirran: summit wind broadly 5-25 mph, with gusts 20-30 mph early in the morning (fresh and blowy). A meaningful thunderstorm risk is indicated from the morning into the evening. Avoid committing to exposed ridges if storms begin to build. Much calmer lower down - generally 0-10 mph in the valley, rising towards the tops. Cloud base around 1900–2200 m in the morning, lowering to 1400–1700 m around midday and 500–800 m by late afternoon. The top is likely to drift in and out of cloud, with the best chance of a view during the morning. Little or no rain expected.

Forecast confidence: Rain is possible, but forecast models differ by about 8 hours on when it arrives.

A grey, cloudy day on Ben Tirran: summit wind broadly 20-35 mph, with gusts 35-45 mph during the evening (strong winds). Much calmer lower down - generally 5-15 mph in the valley, rising towards the tops. Cloud base around 400-700 m in the morning, lifting to 600-900 m around midday. Expect the top to stay in cloud for most or all of daylight, with no dependable break. Cloud is likely to hang lowest on northern slopes; the southern side should see somewhat higher bases and better breaks. Little or no rain expected. Confidence moderate (Summit wind could be roughly 20-37 mph, which changes how difficult exposed walking may feel) - the summit peak could reasonably be 20-37 mph, so treat the headline as mid-range.

Forecast confidence: Rain is possible, but forecast models differ by about 14 hours on when it arrives.

Cloud-free timing: Around 0% early, improving to around 60% later.

A mixed day on Ben Tirran: summit wind broadly 5-25 mph, with gusts 25-35 mph early in the morning (fresh and blowy). Much calmer lower down - generally 0-10 mph in the valley, rising towards the tops. Cloud base around 800-1100 m in the morning, lifting to 1300-1600 m around midday. The top is likely to drift in and out of cloud, with the best chance of a view from the morning into the evening. Some rain is likely, with up to around 2 mm indicated; timing and local totals remain uncertain. Confidence moderate (Summit wind could be roughly 13-26 mph, which changes how difficult exposed walking may feel) - the summit peak could reasonably be 13-26 mph, so treat the headline as mid-range.

Forecast confidence: Thunderstorm timing is inherently uncertain and may shift by several hours.

Cloud-free timing: Cloudy early, clearing later.

A wild day on Ben Tirran: summit wind broadly 5-15 mph, with gusts 10-20 mph during the afternoon (a moderate breeze). A meaningful thunderstorm risk is indicated from the morning into the evening. Avoid committing to exposed ridges if storms begin to build. There could be a spate risk based on forecast rainfall. Burns and unbridged crossings may rise quickly. Most likely from around 00:00 until around 23:00. Cloud base around 400-700 m in the morning, lifting to 1300-1600 m around midday. Summit cloud should lift later, bringing a better chance of clear views. A persistently wet day is possible, with around 5-10 mm indicated; local totals could vary considerably. Cloud base is the least certain part of this - the models are only moderately agreed, so it could sit a couple of hundred metres either way.

Forecast confidence: A low thunderstorm risk remains difficult to time precisely.

Cloud-free timing: Around 0% early, improving to around 20% later.

A rough, clagged-in day on Ben Tirran: summit wind broadly 5-25 mph, with gusts 25-35 mph during the evening (strong winds). Thunderstorms are possible from early morning into the evening. Keep an escape route from exposed ridges and descend if thunder develops. The ground is likely to be wet after recent rain. There could be a spate risk based on forecast rainfall. Burns and unbridged crossings may rise quickly. Most likely from around 14:00 until around 23:00. Much calmer lower down - generally 0-10 mph in the valley, rising towards the tops. Cloud base around 400–700 m in the morning, lifting to 600–900 m around midday and 800–1100 m by late afternoon. The top is likely to drift in and out of cloud, with the best chance of a view during the afternoon. A persistently wet day is possible, with around 10-20 mm indicated; local totals could vary considerably. Confidence moderate (Summit wind could be roughly 13-31 mph, which changes how difficult exposed walking may feel) - the summit peak could reasonably be 13-31 mph, so treat the headline as mid-range.