A wild day on Moel Sych: summit wind broadly 15-40 mph, with gusts 40-50 mph early in the morning (gale-force winds). Much calmer lower down - generally 5-15 mph in the valley, rising towards the tops. Cloud base 600-1300 m - 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 will be lowest on the NW slopes, down to about 500-800 m; the SE side should be clearer, lifting to around 700-1000 m. Some rain is likely, with up to around 2 mm indicated; timing and local totals remain uncertain. Cold on top: air temperature broadly 6 to 10°C, feeling around 0 to 4°C in the wind - wrap up.
Moel Sych weather forecast.
827 m summit forecast for wind, cloud, rain and temperature. Updated from the Thursday 6 August 2026 model run.
Seven-day Moel Sych forecast.
Conditions can change quickly with height. Use the day-by-day summit detail below, then check again close to departure.
A fine day on Moel Sych: 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 1000-1600 m) - clear summits. Little or no rain expected. 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 Moel Sych: summit wind broadly 10-25 mph, with gusts 20-30 mph during the evening (fresh and blowy). Any cloud sits well above the tops (base 1200-3200 m) - clear summits. Little or no rain expected. Bright spells with UV up to 7 - sunscreen on exposed skin. Confidence moderate (ensemble members show a moderate spread) - the summit peak could reasonably be 14-22 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 mixed day on Moel Sych: summit wind broadly 10-30 mph, with gusts 30-40 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 3000-3300 m) - clear summits. Little or no rain expected. Bright spells with UV up to 7 - sunscreen on exposed skin. Low confidence (ensemble members are widely spread) - the summit peak could be anywhere from 16 to 33 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 mixed day on Moel Sych: summit wind broadly 5-15 mph, with gusts 10-20 mph early in the morning (a moderate breeze). Cloud base 800-1600 m - the top is likely to drift in and out of cloud, with the best chance of a view from around midday into the evening. The cloud base is very changeable today - it could sit much higher or lower than that at times, so read the sky. Little or no rain expected. Bright spells with UV up to 7 - sunscreen on exposed skin. Low confidence (ensemble members are widely spread) - the summit peak could be anywhere from 8 to 15 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 mixed day on Moel Sych: summit wind broadly 20-30 mph, with gusts 30-40 mph early in the morning (strong winds). Much calmer lower down - generally 5-15 mph in the valley, rising towards the tops. Any cloud sits well above the tops (base 800-2000 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 14 to 37 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 mixed day on Moel Sych: summit wind broadly 15-35 mph, with gusts 30-40 mph during the evening (strong winds). Much calmer lower down - generally 5-15 mph in the valley, rising towards the tops. Any cloud sits well above the tops (base 800-1800 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 20 to 45 mph; check again nearer the time.
Forecast run: 2026-08-06
A forecast is part of the decision.
Mountain weather can differ sharply from conditions in the valley. Check official warnings, carry appropriate navigation and clothing, and be ready to change the plan.