EuroVelo 1 - Atlantic Coast Route - part St George's Channel: which way and when to ride
The best month for EuroVelo 1 - Atlantic Coast Route - part St George's Channel is June: 71% of days were dry with highs of 10–30 °C. In June, riding Rosslare → Fishguard meant an average tailwind of 5.7 km/h (ERA5 2006–2025, daytime 9:00–18:00).
Weather by month
| Month | Good days | Rain days ≥ 1 mm | Rain, mm | Avg high | Days ≥ 30 °C | Days < 10 °C | Daylight, h |
|---|---|---|---|---|---|---|---|
| January | 13% | 33% | 116 | 8 °C | 0% | 72% | 8.2 † |
| February | 13% | 29% | 88 | 8 °C | 0% | 77% | 9.8 † |
| March | 24% | 29% | 83 | 9 °C | 0% | 64% | 11.7 |
| April | 58% | 24% | 64 | 11 °C | 0% | 28% | 13.8 |
| May | 69% | 29% | 79 | 14 °C | 0% | 3% | 15.7 |
| June | 71% | 29% | 81 | 16 °C | 0% | 0% | 16.7 |
| July | 68% | 32% | 89 | 17 °C | 0% | 0% | 16.3 |
| August | 67% | 33% | 94 | 17 °C | 0% | 0% | 14.6 |
| September | 69% | 31% | 100 | 16 °C | 0% | 0% | 12.6 |
| October | 66% | 33% | 122 | 14 °C | 0% | 2% | 10.5 † |
| November | 37% | 42% | 133 | 11 °C | 0% | 30% | 8.7 † |
| December | 20% | 40% | 143 | 9 °C | 0% | 54% | 7.8 † |
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 Rosslare → Fishguard, km/h | Headwind > 15 km/h, Rosslare → Fishguard | Headwind > 15 km/h, Fishguard → Rosslare | Better way |
|---|---|---|---|---|
| January | +6.1 | 11% | 33% | Rosslare → Fishguard |
| February | +4.6 | 13% | 31% | Rosslare → Fishguard |
| March | +3.0 | 13% | 22% | Rosslare → Fishguard |
| April | +2.0 | 11% | 16% | Rosslare → Fishguard |
| May | +4.7 | 7% | 20% | Rosslare → Fishguard |
| June | +5.7 | 4% | 18% | Rosslare → Fishguard |
| July | +7.6 | 3% | 22% | Rosslare → Fishguard |
| August | +7.8 | 5% | 28% | Rosslare → Fishguard |
| September | +5.2 | 7% | 25% | Rosslare → Fishguard |
| October | +3.4 | 13% | 24% | Rosslare → Fishguard |
| November | +5.3 | 12% | 30% | Rosslare → Fishguard |
| December | +6.5 | 11% | 33% | Rosslare → Fishguard |
Along the route (sections of about 25 km)
| km | Heading | Tailwind in June, km/h |
|---|---|---|
| 0–98 | E | +6.2 |
| 98–103 | SW | −4.1 |
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.