150 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 Box Hill: summit wind broadly 5-15 mph, with gusts 10-20 mph during the evening (a moderate breeze). Any cloud sits well above the tops (base 800-2100 m) - clear summits. Little or no rain expected.
A fine day on Box Hill: summit wind broadly 0-15 mph, with gusts 5-15 mph during the afternoon (a moderate breeze). Any cloud sits well above the tops (base 2000-2300 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 6-11 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 Box Hill: summit wind broadly 0-15 mph, with gusts 10-20 mph during the afternoon (a moderate breeze). Any cloud sits well above the tops (base 2100-2700 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 7-12 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 Box Hill: summit wind broadly 0-15 mph, with gusts 10-20 mph during the afternoon (a moderate breeze). Any cloud sits well above the tops (base 700-1000 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 8-14 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 Box Hill: summit wind broadly 0-10 mph, with gusts 5-15 mph during the morning (a moderate breeze). Any cloud sits well above the tops (base 600-1700 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 6 to 10 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.
A fine day on Box Hill: 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 400-2000 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 8 to 14 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.
A fine day on Box Hill: 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 2200-3200 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 5 to 15 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.
Forecast run: 2026-08-06
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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.