Leith Hill weather forecast.

295 m summit in Bannau Brycheiniog (Brecon Beacons). Seven-day wind, cloud, rain and temperature forecast, updated 27 August 2026 at 04:40 UTC.

At a glance

Today on Leith Hill.

Leith Hill on Thursday 27 August 2026: summit wind around 11 mph S, gusting 16 mph; modelled cloud-free summit for 92% of daylight; feels like 18°C; 3.9 mm rain.

Medium confidenceHow the forecast works

Seven-day Leith Hill forecast.

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

Medium confidence
Wind11 mph S Gusts16 mph Feels18°C Rain3.9 mm Cloud-free summit92% Cloud base1,310 m Freezing level3,110 m Daylight06:06–19:59 · 13.9 h

Forecast confidence: Thunderstorm timing is inherently uncertain and may shift by several hours.

Thunder risk: likely

from early morning into the evening. Leave exposed summits and ridges if thunder develops.

Cloud-free timing: Around 67% early, improving to around 100% later.

A mixed day on Leith Hill: summit wind broadly 5-15 mph, with gusts 10-20 mph during the afternoon (a moderate breeze). Thunderstorms are forecast from early morning into the evening. Avoid exposed summits and ridges during the risk period. Any cloud sits well above the tops (base 500-1800 m) - clear summits. Some rain is likely, with around 2-5 mm indicated; timing and local totals remain uncertain.

Medium confidence
Wind21 mph SW Gusts29 mph Feels15°C Rain0.2 mm Cloud-free summit100% Cloud base1,035 m Freezing level2,660 m Daylight06:07–19:56 · 13.8 h

Forecast confidence: Thunderstorm timing is inherently uncertain and may shift by several hours.

Thunder risk: moderate

from the morning into the evening. Leave exposed summits and ridges if thunder develops.

A fine day on Leith Hill: summit wind broadly 10-25 mph, with gusts 25-35 mph during the afternoon (fresh and blowy). A meaningful thunderstorm risk is indicated from the morning into the evening. Avoid committing to exposed ridges if storms begin to build. The ground is likely to be saturated after recent rain. Expect boggy paths and rapid runoff if more rain arrives. Any cloud sits well above the tops (base 900-1500 m) - clear summits. Cloud is likely to hang lowest on southwestern slopes; the northeastern side should see somewhat higher bases and better breaks. Little or no rain expected.

Medium confidence
Wind18 mph SW Gusts26 mph Feels15°C Rain5.1 mm Cloud-free summit100% Cloud base510 m Freezing level3,102 m Daylight06:09–19:54 · 13.8 h

Forecast confidence: Thunderstorm timing is inherently uncertain and may shift by several hours.

Thunder risk: moderate

from around midday into the evening. Leave exposed summits and ridges if thunder develops.

A mixed day on Leith Hill: summit wind broadly 10-25 mph, with gusts 20-30 mph around midday (fresh and blowy). A meaningful thunderstorm risk is indicated from around midday into the evening. Avoid committing to exposed ridges if storms begin to build. The ground is likely to be wet after recent rain. Any cloud sits well above the tops (base 500-1000 m) - clear summits. Cloud is likely to hang lowest on southwestern slopes; the northeastern side should see somewhat higher bases and better breaks. Some rain is likely, with around 5-10 mm indicated; timing and local totals remain uncertain.

Medium confidence
Wind14 mph SW Gusts20 mph Feels14°C Rain1.5 mm Cloud-free summit100% Cloud base518 m Freezing level3,130 m Daylight06:10–19:52 · 13.7 h

Forecast confidence: Thunderstorm timing is inherently uncertain and may shift by several hours.

Thunder risk: moderate

from late afternoon into the evening. Leave exposed summits and ridges if thunder develops.

Spate watch

Burns and unbridged crossings may rise quickly. Assess them at the water and turn back if unsure.

A mixed day on Leith Hill: summit wind broadly 10-20 mph, with gusts 15-25 mph around midday (fresh and blowy). A meaningful thunderstorm risk is indicated from late afternoon into the evening. Avoid committing to exposed ridges if storms begin to build. The ground is likely to be wet after recent rain. There could be a spate risk based on forecast rainfall. Burns and unbridged crossings may rise quickly. Most likely from around 17:00 until around 02:00 the following day. Any cloud sits well above the tops (base 400-700 m) - clear summits. Cloud is likely to hang lowest on southwestern slopes; the northeastern side should see somewhat higher bases and better breaks. Some rain is likely, with up to around 2 mm indicated; timing and local totals remain uncertain.

Medium confidence
Wind22 mph W Gusts31 mph Feels12°C Rain0.0 mm Cloud-free summit100% Cloud base1,560 m Freezing level2,275 m Daylight06:12–19:50 · 13.6 h

Forecast confidence: The broad weather pattern is useful, although some detail may change.

A mixed day on Leith Hill: summit wind broadly 15-25 mph, with gusts 25-35 mph during the afternoon (strong winds). Any cloud sits well above the tops (base 900-1800 m) - clear summits. Little or no rain expected. Confidence moderate (forecast models agree on the walking impact of the wind) - the summit peak could reasonably be 19-26 mph, so treat the headline as mid-range.

High confidence
Wind18 mph SW Gusts25 mph Feels11°C Rain0.6 mm Cloud-free summit100% Cloud base1,481 m Freezing level2,523 m Daylight06:13–19:48 · 13.6 h

A fine day on Leith Hill: summit wind broadly 10-25 mph, with gusts 20-30 mph around midday (fresh and blowy). Any cloud sits well above the tops (base 1100-1500 m) - clear summits. Cloud is likely to hang lowest on southwestern slopes; the northeastern side should see somewhat higher bases and better breaks. Little or no rain expected.

Forecast run: 2026-08-27

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Selected from our cottage catalogue for practical access to routes around Leith Hill. Prices and availability must be confirmed with the provider.

Byre Cottage near Leith Hill Cottages.com

Byre Cottage

Arundel Sleeps 4 27 min drive to Leith Hill route · 22.9 km Indicative price £377 for 7 nights
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The Hive near Leith Hill Cottages.com

The Hive

Arundel Sleeps 2 36 min drive to Leith Hill route · 27.1 km Indicative price £343 for 7 nights
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Farmhouse Garden Shepherds Hut near Leith Hill Cottages.com

Farmhouse Garden Shepherds Hut

All Surrey Sleeps 2 51 min drive to Leith Hill route · 44.8 km Indicative price £373 for 7 nights
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Accommodation links may be affiliate links. Prices and availability must be rechecked with the provider. Catalogue updated 26 August 2026 at 13:05 UTC.

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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. Read how Mountain Weather forecasts are produced and where their limits lie.