228 m summit forecast for wind, cloud, rain and temperature. Updated from the Thursday 6 August 2026 model run.
Conditions can change quickly with height. Use the day-by-day summit detail below, then check again close to departure.
A fine day on Carn Brea: summit wind broadly 5-15 mph, with gusts 10-20 mph during the morning (a moderate breeze). Any cloud sits well above the tops (base 1000-1600 m) - clear summits. Little or no rain expected.
A fine day on Carn Brea: summit wind broadly 0-15 mph, with gusts 5-15 mph around midday (a moderate breeze). Any cloud sits well above the tops (base 1000-1600 m) - clear summits. Little or no rain expected. Confidence moderate (ensemble members show a moderate spread) - the summit peak could reasonably be 6-10 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 Carn Brea: summit wind broadly 5-20 mph, with gusts 15-25 mph around midday (a moderate breeze). Any cloud sits well above the tops (base 800-1200 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. 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 Carn Brea: summit wind broadly 5-20 mph, with gusts 15-25 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. Low confidence (ensemble members are widely spread) - the summit peak could be anywhere from 12 to 22 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 Carn Brea: 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 500-1200 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 7 to 16 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 Carn Brea: summit wind broadly 5-15 mph, with gusts 10-20 mph during the afternoon (a moderate breeze). Summits should stay clear of cloud - good visibility on top. 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 6 to 15 mph; check again nearer the time.
A fine day on Carn Brea: summit wind broadly 5-15 mph, with gusts 10-20 mph around midday (a moderate breeze). Any cloud sits well above the tops (base 200-900 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 7 to 14 mph; check again nearer the time.
Forecast run: 2026-08-06
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.