Great Rhos weather forecast.

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

Cloud-free timing: Around 0% early, improving to around 40% later.

A rough, clagged-in day on Great Rhos: summit wind broadly 10-25 mph, with gusts 20-30 mph early in the morning (fresh and blowy). Thunderstorms are forecast from the morning into the evening. Avoid exposed summits and ridges during the risk period. High spate risk based on forecast rainfall. Burns and unbridged crossings may become difficult or impassable. Most likely from around 05:00 until around 00:00 the following day. Cloud base mostly around 500–800 m through daylight. The top is likely to drift in and out of cloud, with the best chance of a view during the afternoon. A persistently wet day is possible, with around 20-40 mm indicated; local totals could vary considerably.

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

Cloud-free timing: Cloudy early, clearing later.

A mixed day on Great Rhos: summit wind broadly 10-25 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 wet after recent rain. Cloud base around 400–700 m in the morning, lifting to 600–900 m around midday and 700–1000 m by late afternoon. Summit cloud should lift later, bringing a better chance of clear views. Cloud is likely to hang lowest on western slopes; the eastern 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. Confidence moderate (forecast models agree on the walking impact of the wind) - the summit peak could reasonably be 20-25 mph, so treat the headline as mid-range.

Forecast confidence: Summit wind could be roughly 17-36 mph, which changes how difficult exposed walking may feel.

Cloud-free timing: Around 0% early, improving to around 80% later.

A grey, cloudy day on Great Rhos: summit wind broadly 15-30 mph, with gusts 30-40 mph during the afternoon (strong winds). Much calmer lower down - generally 5-15 mph in the valley, rising towards the tops. Cloud base around 400–700 m through the morning, lifting to 700–1000 m by late afternoon. 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 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 (Summit wind could be roughly 17-36 mph, which changes how difficult exposed walking may feel) - the summit peak could reasonably be 17-36 mph, so treat the headline as mid-range.

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

Cloud-free timing: Cloudy early, clearing later.

A mixed day on Great Rhos: summit wind broadly 15-30 mph, with gusts 25-35 mph during the evening (strong winds). Thunderstorms are a significant hazard from around midday into the evening. Exposed summits and ridges are a poor choice while storms are nearby. The ground is likely to be wet after recent rain. Cloud base around 400–700 m in the morning, then around 1900–2200 m around midday and 1100–1400 m by late afternoon. Summit cloud should lift later, bringing a better chance of clear views. 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 17-26 mph, so treat the headline as mid-range.

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

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

A wild day on Great Rhos: summit wind broadly 25-40 mph, with gusts 45-55 mph around midday (gale-force winds). Much calmer lower down - generally 15-25 mph in the valley, rising towards the tops. Any cloud sits well above the tops (base 900-1500 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 28-38 mph, so treat the headline as mid-range.

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

Cloud-free timing: Cloudy early, clearing later.

A mixed day on Great Rhos: summit wind broadly 15-30 mph, with gusts 35-45 mph early in the morning (strong winds). Much calmer lower down - generally 10-20 mph in the valley, rising towards the tops. Any cloud sits well above the tops (base 700-1500 m) - clear summits. Cloud is likely to hang lowest on western slopes; the eastern 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. Bright spells with UV up to 5 - sunscreen on exposed skin. Confidence moderate (forecast models agree on the walking impact of the wind) - the summit peak could reasonably be 20-32 mph, so treat the headline as mid-range.