EuroVelo 2 – Capitals Route (United Kingdom), stage 1: Holyhead → Porthmadog
On stage 1 (Holyhead → Porthmadog, 110 km) the best month is June: 69% of days were dry with highs of 10–30 °C; the wind barely favours either direction (1.1 km/h on average; ERA5 2006–2025, 9:00–18:00).
← EuroVelo 2 – Capitals Route (United Kingdom) (Whole route)
Weather by month
| Month | Good days | Rain days ≥ 1 mm | Rain, mm | Avg high | Days ≥ 30 °C | Days < 10 °C | Daylight, h |
|---|---|---|---|---|---|---|---|
| January | 8% | 36% | 129 | 7 °C | 0% | 82% | 8.1 † |
| February | 9% | 34% | 100 | 8 °C | 0% | 84% | 9.8 † |
| March | 22% | 32% | 94 | 9 °C | 0% | 70% | 11.7 |
| April | 51% | 31% | 68 | 11 °C | 0% | 33% | 13.9 |
| May | 65% | 32% | 82 | 14 °C | 0% | 6% | 15.8 |
| June | 69% | 31% | 88 | 16 °C | 0% | 0% | 16.9 |
| July | 62% | 37% | 100 | 18 °C | 0% | 0% | 16.5 |
| August | 63% | 37% | 106 | 17 °C | 0% | 0% | 14.8 |
| September | 65% | 35% | 115 | 16 °C | 0% | 0% | 12.6 |
| October | 61% | 35% | 136 | 14 °C | 0% | 5% | 10.5 † |
| November | 30% | 40% | 145 | 10 °C | 0% | 43% | 8.6 † |
| December | 13% | 41% | 159 | 8 °C | 0% | 66% | 7.6 † |
Best months are all months within 3 percentage points of the best one. † less than 11 hours of daylight — long stages get tight.
Wind by month
| Month | Wind Holyhead → Porthmadog, km/h | Headwind > 15 km/h, Holyhead → Porthmadog | Headwind > 15 km/h, Porthmadog → Holyhead | Better way |
|---|---|---|---|---|
| January | +0.7 | 16% | 20% | either |
| February | −0.7 | 18% | 17% | either |
| March | −0.2 | 16% | 15% | either |
| April | +0.3 | 13% | 12% | either |
| May | +0.7 | 12% | 12% | either |
| June | +1.1 | 10% | 10% | either |
| July | +1.6 | 11% | 11% | either |
| August | +1.0 | 13% | 14% | either |
| September | +1.0 | 13% | 15% | either |
| October | −1.0 | 18% | 15% | either |
| November | +0.8 | 15% | 19% | either |
| December | 0.0 | 17% | 19% | either |
Along the route (sections of about 25 km)
| km | Heading | Tailwind in June, km/h |
|---|---|---|
| 0–25 | SE | +2.2 |
| 25–50 | E | +5.2 |
| 50–75 | S | −6.2 |
| 75–100 | SE | +1.9 |
| 100–110 | SE | +4.1 |
Other stages
- Holyhead → Porthmadog 110 km
- Porthmadog → Llanidloes 112 km
- Llanidloes → Abergavenny 122 km
- Abergavenny → Trowbridge 116 km
- Trowbridge → Reading 112 km
- Reading → London 102 km
- London → Harwich 182 km
How to read the numbers
Wind is the 10 m wind of a 25-km grid cell, daytime hours 9:00–18:00 local solar time; at saddle height in a sheltered valley it is weaker, on a coast or ridge stronger. A positive value is a tailwind. ERA5 slightly over-counts days with ≥ 1 mm of rain (by about 5–7 percentage points) and underestimates daily highs by 1–2 °C. Good day = less than 1 mm of rain between 9:00 and 18:00 (riding hours, local solar time) and a high between 10 and 30 °C; rain at night or in the evening does not spoil it.