Compare all 15 summits over 3,000 feet in Eryri before committing to this long and serious mountain challenge.
Every summit is shown side by side. The combined grade gives extra weight to the weakest forecast.
A grey, cloudy day on Snowdon - Yr Wyddfa: summit wind broadly 20-35 mph, with gusts 40-50 mph during the evening (gale-force winds).
A grey, cloudy day on Crib y Ddysgl: summit wind broadly 20-35 mph, with gusts 40-50 mph during the evening (gale-force winds).
A mixed day on Crib Goch: summit wind broadly 20-35 mph, with gusts 40-50 mph during the evening (gale-force winds).
A mixed day on Elidir Fawr: summit wind broadly 20-35 mph, with gusts 40-50 mph during the evening (gale-force winds).
A mixed day on Y Garn: summit wind broadly 20-35 mph, with gusts 40-50 mph during the evening (gale-force winds).
A mixed day on Glyder Fawr: summit wind broadly 20-35 mph, with gusts 40-50 mph during the evening (gale-force winds).
A mixed day on Glyder Fach: summit wind broadly 20-35 mph, with gusts 40-50 mph during the evening (gale-force winds).
A wild day on Tryfan: summit wind broadly 25-40 mph, with gusts 40-50 mph during the evening (gale-force winds).
A wild day on Pen yr Ole Wen: summit wind broadly 25-40 mph, with gusts 40-50 mph during the evening (gale-force winds).
A wild day on Carnedd Dafydd: summit wind broadly 25-40 mph, with gusts 40-50 mph during the evening (gale-force winds).
A rough, clagged-in day on Carnedd Llewelyn: summit wind broadly 25-40 mph, with gusts 40-50 mph during the evening (gale-force winds).
A wild day on Yr Elen: summit wind broadly 25-40 mph, with gusts 40-50 mph during the evening (gale-force winds).
A wild day on Foel Grach: summit wind broadly 20-40 mph, with gusts 40-50 mph during the evening (gale-force winds).
A mixed day on Garnedd Uchaf: summit wind broadly 20-35 mph, with gusts 40-50 mph during the evening (gale-force winds).
A mixed day on Foel-fras: summit wind broadly 20-35 mph, with gusts 40-50 mph during the evening (gale-force winds).
Weather data: Open-Meteo (CC BY 4.0). Adapted by Mountain Weather.
The Welsh 3000s crosses the Yr Wyddfa, Glyderau and Carneddau ranges, taking in 15 summits above 3,000 feet. Its length, exposed scrambling and repeated high ground make a single valley forecast inadequate for choosing a day.
The combined grade is deliberately conservative and gives extra weight to the weakest summit. Review every row, especially Crib Goch and Tryfan, and use the full peak pages for timing and hazard detail.
Read BMC Welsh 3000s guide