Creigiau Gleision weather forecast.

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

A fine day on Creigiau Gleision: summit wind broadly 10-25 mph, with gusts 25-35 mph early in the morning (fresh and blowy). Cloud base around 600-900 m in the morning, lifting to 1000-1300 m around midday and 1400-1700 m by late afternoon. The top is likely to drift in and out of cloud; views may come and go. Cloud is likely to hang lowest on western slopes; the eastern side should see somewhat higher bases and better breaks. Little or no rain expected.

Cloud-free timing: Around 50% early, improving to around 100% later.

A fine day on Creigiau Gleision: summit wind broadly 5-25 mph, with gusts 20-30 mph around midday (fresh and blowy). Any cloud sits well above the tops (base 800-1600 m) - clear summits. Little or no rain expected.

A fine day on Creigiau Gleision: summit wind broadly 10-25 mph, with gusts 20-30 mph during the afternoon (fresh and blowy). Any cloud sits well above the tops (base 1500-1800 m) - clear summits. Little or no rain expected. Bright spells with UV up to 5 - sunscreen on exposed skin. Low confidence (ensemble members are widely spread) - the summit peak could be anywhere from 13 to 25 mph; check again nearer the time. Treat the cloud base with caution - the models disagree on humidity, so it could be well above or below the figure given.

A fine day on Creigiau Gleision: summit wind broadly 5-15 mph, with gusts 10-20 mph early in the morning (a moderate breeze). Any cloud sits well above the tops (base 1400-1800 m) - clear summits. Little or no rain expected. Bright spells with UV up to 6 - sunscreen on exposed skin. Low confidence (ensemble members are widely spread) - the summit peak could be anywhere from 8 to 18 mph; check again nearer the time. 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.

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

A mixed day on Creigiau Gleision: summit wind broadly 5-15 mph, with gusts 10-20 mph early in the morning (a moderate breeze). Cloud base around 500-800 m in the morning, lifting to 1400-1700 m around midday and 1400-1700 m by late afternoon. The top is likely to drift in and out of cloud; views may come and go. Little or no rain expected. Bright spells with UV up to 5 - sunscreen on exposed skin. Low confidence (ensemble members are widely spread) - the summit peak could be anywhere from 9 to 22 mph; check again nearer the time.

A fine day on Creigiau Gleision: summit wind broadly 10-20 mph, with gusts 20-30 mph early in the morning (fresh and blowy). Any cloud sits well above the tops (base 1500-1900 m) - clear summits. Little or no rain expected. Bright spells with UV up to 6 - sunscreen on exposed skin. Low confidence (ensemble members are widely spread) - the summit peak could be anywhere from 9 to 26 mph; check again nearer the time.

A fine day on Creigiau Gleision: summit wind broadly 10-25 mph, with gusts 20-30 mph early in the morning (fresh and blowy). Thunder watch from the afternoon into overnight: a small but credible risk is present. Watch for growing clouds and leave exposed tops if thunder develops. Any cloud sits well above the tops (base 1500-1900 m) - clear summits. Little or no rain expected. Bright spells with UV up to 6 - sunscreen on exposed skin. Low confidence (ensemble members are widely spread) - the summit peak could be anywhere from 10 to 25 mph; check again nearer the time. 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.