Base Brown weather forecast.

646 m summit forecast for wind, cloud, rain and temperature. Updated from the Thursday 6 August 2026 model run.

Seven-day Base Brown forecast.

Conditions can change quickly with height. Use the day-by-day summit detail below, then check again close to departure.

High confidence
Wind32 mph NW Gusts45 mph Feels3°C Rain0.6 mm Cloud base628 m Freezing level2,130 m

A rough, clagged-in day on Base Brown: summit wind broadly 20-35 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 500-900 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. Little or no rain expected.

High confidence
Wind25 mph W Gusts35 mph Feels6°C Rain0.0 mm Cloud base839 m Freezing level2,040 m

A mixed day on Base Brown: summit wind broadly 15-30 mph, with gusts 30-40 mph around midday (strong winds). Much calmer lower down - generally 5-15 mph in the valley, rising towards the tops. Cloud base 600-1100 m - the top is likely to drift in and out of cloud, with the best chance of a view from the morning into the evening. Cloud will be lowest on the W slopes, down to about 700-1000 m; the E side should be clearer, lifting to around 900-1200 m. Little or no rain expected.

Medium confidence
Wind29 mph SW Gusts40 mph Feels8°C Rain0.0 mm Cloud base814 m Freezing level3,250 m

A mixed day on Base Brown: summit wind broadly 20-35 mph, with gusts 35-45 mph around midday (strong winds). Much calmer lower down - generally 5-15 mph in the valley, rising towards the tops. Cloud base 500-1100 m - the top is likely to drift in and out of cloud, with the best chance of a view from the morning into the evening. Little or no rain expected. Bright spells with UV up to 5 - sunscreen on exposed skin. Confidence moderate - the forecast models differ somewhat (the forecast models show a moderate spread), so treat the numbers as a guide.

Medium confidence
Wind23 mph W Gusts32 mph Feels11°C Rain4.1 mm Cloud base555 m Freezing level10,000 m

A grey, cloudy day on Base Brown: summit wind broadly 10-30 mph, with gusts 25-35 mph during the morning (strong winds). Much calmer lower down - generally 5-15 mph in the valley, rising towards the tops. Cloud base 500-800 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 W slopes, down to about 400-700 m; the E side should be clearer, lifting to around 600-900 m. Some rain is likely, with around 2-5 mm indicated; timing and local totals remain uncertain. Confidence moderate - the forecast models differ somewhat (the forecast models show a moderate spread), so treat the numbers as a guide.

Low confidence
Wind10 mph N Gusts14 mph Feels8°C Rain2.2 mm Cloud base1,248 m Freezing level10,000 m

A mixed day on Base Brown: summit wind broadly 5-15 mph, with gusts 10-20 mph around midday (a moderate breeze). Cloud base 500-1400 m - the top is likely to drift in and out of cloud, with the best chance of a view from the morning 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. Some rain is likely, with around 2-5 mm indicated; timing and local totals remain uncertain. Bright spells with UV up to 6 - sunscreen on exposed skin. Low confidence - the models disagree markedly (the forecast models are widely spread); 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.

Medium confidence
Wind22 mph SE Gusts30 mph Feels9°C Rain0.0 mm Cloud base1,075 m Freezing level10,000 m

A mixed day on Base Brown: summit wind broadly 15-25 mph, with gusts 25-35 mph around midday (strong winds). Little or no rain expected. Bright spells with UV up to 6 - sunscreen on exposed skin. Confidence moderate - the forecast models differ somewhat (the forecast models show a moderate spread), so treat the numbers as a guide. Treat the cloud base with caution - the models disagree on humidity, so it could be well above or below the figure given.

Low confidence
Wind26 mph S Gusts36 mph Feels14°C Rain1.0 mm Cloud base1,072 m Freezing level10,000 m

A mixed day on Base Brown: summit wind broadly 20-30 mph, with gusts 30-40 mph around midday (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 1000-1300 m) - clear summits. Some rain is likely, with up to around 2 mm indicated; timing and local totals remain uncertain. Bright spells with UV up to 5 - sunscreen on exposed skin. Low confidence - the models disagree markedly (the forecast models are widely spread); 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

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.