Carnedd Llewelyn weather forecast.

Forecast confidence: Rain could reach the main walking period or hold off until later; forecast models disagree on the timing.

Cloud-free timing: Around 10% early, improving to around 50% later.

A wild day on Carnedd Llewelyn: summit wind broadly 20-45 mph, with gusts 50-60 mph at times (strong winds). The ground is likely to be wet after recent rain. Much calmer lower down - generally 10-20 mph in the valley, rising towards the tops. Cloud base around 1000–1300 m through the morning, lifting to 1700–2000 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 height is close to summit level at times, so small local changes could put the top in or out of cloud. about 5 hours of sunshine is indicated, with a greater share of sunshine later in the day. Little or no rain is indicated. Confidence moderate (forecast models agree on the walking impact of the wind) - walker-height summit wind could reasonably be 33-42 mph, with gusts 47-59 mph. Cloud height remains uncertain, especially where it is close to summit level.

Forecast confidence: Forecast models differ on whether meaningful rain reaches the hills during the morning.

Cloud-free timing: Around 15% early, falling to around 0% later.

A wet day with extensive summit cloud on Carnedd Llewelyn: summit wind broadly 20-30 mph, with gusts 35-45 mph at times (strong winds). Cloud base around 900–1200 m in the morning, lowering to 700–1000 m around midday and 500–800 m by late afternoon. The forecast indicates clag for much of the day, though a brief clearance is possible early in the morning. Cloud height is close to summit level at times, so small local changes could put the top in or out of cloud. Cloud may hang lower on western slopes and lift somewhat on the eastern side, but local terrain can differ. about 11 hours of sunshine is indicated, with a smaller share of sunshine later in the day. Rain is forecast through much of daylight, with around 5-10 mm indicated; local totals could vary. Cold on top: air temperature broadly 2 to 6°C, feeling around -4 to 0°C in the wind - wrap up. Confidence moderate (forecast models agree on the walking impact of the wind) - walker-height summit wind could reasonably be 24-30 mph, with gusts 33-42 mph. Cloud height remains uncertain, especially where it is close to summit level.

Forecast confidence: Cloud height is close to summit level at times, so small local changes could put the top in or out of cloud.

A grey, cloudy day on Carnedd Llewelyn: summit wind broadly 10-30 mph, with gusts 30-40 mph at times (fresh and blowy). Much calmer lower down - generally 5-15 mph in the valley, rising towards the tops. Cloud base around 500–800 m in the morning, lifting to 700–1000 m around midday and 1000–1300 m by late afternoon. The forecast indicates cloud on the top for most or all of daylight, with no dependable break apparent. Cloud height is close to summit level at times, so small local changes could put the top in or out of cloud. Cloud may hang lower on western slopes and lift somewhat on the eastern side, but local terrain can differ. Sunshine is indicated for much of daylight, totalling about 12 hours. Some rain is indicated, with up to around 2 mm forecast; timing and local totals remain uncertain. Cold on top: air temperature broadly 2 to 6°C, feeling around -2 to 2°C in the wind - wrap up. Confidence moderate (forecast models agree on the walking impact of the wind) - walker-height summit wind could reasonably be 19-27 mph, with gusts 27-38 mph. Cloud height remains uncertain, especially where it is close to summit level.

Forecast confidence: Forecast models differ on whether meaningful rain reaches the hills during the afternoon and evening.

Cloud-free timing: Around 50% early, falling to around 10% later.

A mixed day on Carnedd Llewelyn: summit wind broadly 10-25 mph, with gusts 25-35 mph at times (fresh and blowy). Cloud base around 1200–1500 m in the morning, then around 1900–2200 m around midday and 900–1200 m by late afternoon. The top is likely to drift in and out of cloud, with the best chance of a view from early morning into around midday. Cloud height is close to summit level at times, so small local changes could put the top in or out of cloud. Cloud may hang lower on southwestern slopes and lift somewhat on the northeastern side, but local terrain can differ. about 4 hours of sunshine is indicated, but amounts vary between the morning, midday and later periods. Little or no rain is indicated. Cold on top: air temperature broadly 4 to 8°C, feeling around 0 to 4°C in the wind - wrap up. Confidence moderate (Summit wind could be roughly 15-32 mph, which changes how difficult exposed walking may feel) - walker-height summit wind could reasonably be 15-32 mph, with gusts 21-45 mph. Cloud height remains uncertain, especially where it is close to summit level.

Forecast confidence: Overall confidence is unavailable: insufficient comparable wind, rain guidance.

Cloud-free timing: Around 20% early, improving to around 60% later.

A grey, cloudy day on Carnedd Llewelyn: summit wind broadly 10-25 mph, with gusts 25-35 mph at times (fresh and blowy). Cloud base around 500–800 m through the morning, lifting to 1200–1500 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 height is close to summit level at times, so small local changes could put the top in or out of cloud. Cloud may hang lower on western slopes and lift somewhat on the eastern side, but local terrain can differ. Sunshine is indicated for much of daylight, totalling about 12 hours. Some rain is indicated, with around 2-5 mm forecast; timing and local totals remain uncertain.