Mynydd Llysiau weather forecast.

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

A fine day on Mynydd Llysiau: summit wind broadly 10-25 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. Any cloud sits well above the tops (base 1000-2100 m) - clear summits. Little or no rain expected.

A fine day on Mynydd Llysiau: summit wind broadly 5-15 mph, with gusts 10-20 mph during the afternoon (a moderate breeze). Any cloud sits well above the tops (base 1500-2200 m) - clear summits. Little or no rain expected. Confidence moderate (ensemble members show a moderate spread) - the summit peak could reasonably be 8-12 mph, so treat the headline as mid-range. 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.

A fine day on Mynydd Llysiau: summit wind broadly 10-20 mph, with gusts 15-25 mph around midday (fresh and blowy). Any cloud sits well above the tops (base 2400-2700 m) - clear summits. Little or no rain expected. Bright spells with UV up to 5 - sunscreen on exposed skin. Confidence moderate (ensemble members show a moderate spread) - the summit peak could reasonably be 12-20 mph, so treat the headline as mid-range. 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.

A fine day on Mynydd Llysiau: summit wind broadly 5-20 mph, with gusts 20-30 mph during the evening (fresh and blowy). Any cloud sits well above the tops (base 2000-2300 m) - clear summits. Little or no rain expected. Bright spells with UV up to 6 - sunscreen on exposed skin. Confidence moderate (ensemble members show a moderate spread) - the summit peak could reasonably be 13-21 mph, so treat the headline as mid-range. Treat the cloud base with caution - the models disagree on humidity, so it could be well above or below the figure given.

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

A fine day on Mynydd Llysiau: summit wind broadly 5-20 mph, with gusts 20-30 mph early in the morning (fresh and blowy). Cloud base around 500-800 m in the morning, lifting to 1900-2200 m around midday and 2000-2300 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 6 - sunscreen on exposed skin. Confidence moderate (ensemble members show a moderate spread) - the summit peak could reasonably be 12-22 mph, so treat the headline as mid-range. 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.

A fine day on Mynydd Llysiau: summit wind broadly 10-25 mph, with gusts 25-35 mph early in the morning (fresh and blowy). Much calmer lower down - generally 5-15 mph in the valley, rising towards the tops. Any cloud sits well above the tops (base 1500-1800 m) - clear summits. Little or no rain expected. Bright spells with UV up to 6 - sunscreen on exposed skin. Confidence moderate (ensemble members show a moderate spread) - the summit peak could reasonably be 16-27 mph, so treat the headline as mid-range.

A mixed day on Mynydd Llysiau: summit wind broadly 10-25 mph, with gusts 25-35 mph early in the morning (strong winds). Much calmer lower down - generally 0-10 mph in the valley, rising towards the tops. Any cloud sits well above the tops (base 1800-2200 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 15 to 32 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.