Sguman Coinntich weather forecast.

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

Cloud-free timing: Cloudy early, clearing later.

A mixed day on Sguman Coinntich: summit wind broadly 10-30 mph, with gusts 25-35 mph early in the morning (strong winds). Thunder watch from late afternoon into the evening: a small but credible risk is present. Watch for growing clouds and leave exposed tops if thunder develops. Much calmer lower down - generally 0-10 mph in the valley, rising towards the tops. Little or no rain expected.

Forecast confidence: Rain is possible, but forecast models differ by about 12 hours on when it arrives.

A grey, cloudy day on Sguman Coinntich: summit wind broadly 10-25 mph, with gusts 25-35 mph during the morning (fresh and blowy). Much calmer lower down - generally 0-10 mph in the valley, rising towards the tops. Cloud base around 400–700 m in the morning, then around 600–900 m around midday and 400–700 m by late afternoon. Expect the top to stay in cloud for most or all of daylight, with no dependable break. Cloud is likely to hang lowest on northeastern slopes; the southwestern side should see somewhat higher bases and better breaks. Some rain is likely, with around 2-5 mm indicated; timing and local totals remain uncertain. Confidence moderate (forecast models agree on the walking impact of the wind) - the summit peak could reasonably be 17-27 mph, so treat the headline as mid-range.

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

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

A grey, cloudy day on Sguman Coinntich: summit wind broadly 0-10 mph, with gusts 5-15 mph during the afternoon (a moderate breeze). Thunderstorms are possible from the morning into the afternoon. Keep an escape route from exposed ridges and descend if thunder develops. Cloud base around 400–700 m through the morning, lifting to 600–900 m by late afternoon. Expect clag for much of the day, though a brief clearance is possible during the afternoon. Some rain is likely, with up to around 2 mm indicated; timing and local totals remain uncertain. 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: Thunderstorm timing is inherently uncertain and may shift by several hours.

A rough, clagged-in day on Sguman Coinntich: summit wind broadly 5-20 mph, with gusts 20-30 mph during the afternoon (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 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 southern slopes; the northern side should see somewhat higher bases and better breaks. A persistently wet day is possible, with around 5-10 mm indicated; local totals could vary considerably.

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

Cloud-free timing: Best around midday at about 75%; around 0% early and 0% later.

A grey, cloudy day on Sguman Coinntich: summit wind broadly 5-20 mph, with gusts 20-30 mph during the evening (fresh and blowy). A meaningful thunderstorm risk is indicated from early morning into the evening. Avoid committing to exposed ridges if storms begin to build. Cloud base around 500–800 m in the morning, then around 1200–1500 m around midday and 300–600 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. Some rain is likely, with around 5-10 mm indicated; timing and local totals remain uncertain. Confidence moderate (Summit wind could be roughly 11-31 mph, which changes how difficult exposed walking may feel) - the summit peak could reasonably be 11-31 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 100% later.

A grey, cloudy day on Sguman Coinntich: summit wind broadly 15-30 mph, with gusts 30-40 mph around midday (strong winds). 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 00:00 until around 17:00. 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 700–1000 m around midday and 900–1200 m by late afternoon. The top is likely to drift in and out of cloud, with the best chance of a view from late afternoon into the evening. Cloud is likely to hang lowest on northern slopes; the southern side should see somewhat higher bases and better breaks. Some rain is likely, with around 5-10 mm indicated; timing and local totals remain uncertain. Cold on top: air temperature broadly 4 to 8°C, feeling around -2 to 2°C in the wind - wrap up. Confidence moderate (Summit wind could be roughly 18-33 mph, which changes how difficult exposed walking may feel) - the summit peak could reasonably be 18-33 mph, so treat the headline as mid-range.