St Agnes Beacon weather forecast.

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

A fine day on St Agnes Beacon: summit wind broadly 5-20 mph, with gusts 15-25 mph during the afternoon (a moderate breeze). Thunderstorms are a significant hazard from early morning into the evening. Exposed summits and ridges are a poor choice while storms are nearby. Any cloud sits well above the tops (base 400-700 m) - clear summits. Little or no rain expected. Bright spells with UV up to 5 - sunscreen on exposed skin.

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

A wild day on St Agnes Beacon: summit wind broadly 15-30 mph, with gusts 30-40 mph during the morning (strong winds). A meaningful thunderstorm risk is indicated from early morning into the evening. Avoid committing to exposed ridges if storms begin to build. Severe spate risk based on forecast rainfall. Burns and unbridged crossings may become unsafe or impassable. Most likely from around 07:00 until around 22:00. Any cloud sits well above the tops (base 400-700 m) - clear summits. Cloud is likely to hang lowest on western slopes; the eastern side should see somewhat higher bases and better breaks. A persistently wet day is possible, with around 20-40 mm indicated; local totals could vary considerably. Confidence moderate (forecast models agree on the walking impact of the wind) - the summit peak could reasonably be 24-30 mph, so treat the headline as mid-range.

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

A mixed day on St Agnes Beacon: summit wind broadly 15-30 mph, with gusts 30-40 mph early in the morning (strong winds). A meaningful thunderstorm risk is indicated from early morning into the afternoon. 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 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 around 2-5 mm indicated; timing and local totals remain uncertain. Confidence moderate (forecast models agree on the walking impact of the wind) - the summit peak could reasonably be 20-28 mph, so treat the headline as mid-range.

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

A mixed day on St Agnes Beacon: summit wind broadly 15-30 mph, with gusts 25-35 mph during the evening (strong winds). Thunderstorms are a significant hazard from early morning into the evening. Exposed summits and ridges are a poor choice while storms are nearby. 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 400-800 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. Bright spells with UV up to 5 - sunscreen on exposed skin.

Forecast confidence: A low thunderstorm risk remains difficult to time precisely.

A mixed day on St Agnes Beacon: summit wind broadly 15-30 mph, with gusts 25-35 mph early in the morning (strong winds). Thunderstorms are possible during the morning. Keep an escape route from exposed ridges and descend if thunder develops. The ground is likely to be wet after recent rain. Any cloud sits well above the tops (base 900-1200 m) - clear summits. Cloud is likely to hang lowest on western slopes; the eastern side should see somewhat higher bases and better breaks. Little or no rain expected. Confidence moderate (forecast models agree on the walking impact of the wind) - the summit peak could reasonably be 19-28 mph, so treat the headline as mid-range.

Forecast confidence: A low thunderstorm risk remains difficult to time precisely.

A wild day on St Agnes Beacon: summit wind broadly 10-25 mph, with gusts 20-30 mph during the morning (fresh and blowy). Thunderstorms are possible from early morning into the evening. Keep an escape route from exposed ridges and descend if thunder develops. Any cloud sits well above the tops (base 500-800 m) - clear summits. Cloud is likely to hang lowest on western slopes; the eastern side should see somewhat higher bases and better breaks. A persistently wet day is possible, with around 5-10 mm indicated; local totals could vary considerably. Bright spells with UV up to 5 - sunscreen on exposed skin.