EuroVelo 1 - Atlantic Coast Route - part Ireland, stage 18: Ballyshannon → Gweedore
On stage 18 (Ballyshannon → Gweedore, 121 km) the best month is September: 62% of days were dry with highs of 10–30 °C, and riding Ballyshannon → Gweedore meant an average tailwind of 3.7 km/h (ERA5 2006–2025, 9:00–18:00).
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Weather by month
| Month | Good days | Rain days ≥ 1 mm | Rain, mm | Avg high | Days ≥ 30 °C | Days < 10 °C | Daylight, h |
|---|---|---|---|---|---|---|---|
| January | 7% | 40% | 124 | 7 °C | 0% | 83% | 7.8 † |
| February | 11% | 40% | 109 | 8 °C | 0% | 79% | 9.6 † |
| March | 22% | 41% | 98 | 9 °C | 0% | 67% | 11.7 |
| April | 48% | 34% | 76 | 11 °C | 0% | 34% | 14.0 |
| May | 56% | 41% | 95 | 14 °C | 0% | 8% | 16.1 |
| June | 59% | 41% | 97 | 16 °C | 0% | 0% | 17.3 |
| July | 52% | 48% | 116 | 17 °C | 0% | 0% | 16.8 |
| August | 52% | 48% | 129 | 17 °C | 0% | 0% | 14.9 |
| September | 62% | 38% | 106 | 15 °C | 0% | 0% | 12.6 |
| October | 54% | 42% | 130 | 13 °C | 0% | 8% | 10.4 † |
| November | 24% | 44% | 131 | 10 °C | 0% | 55% | 8.3 † |
| December | 10% | 46% | 138 | 8 °C | 0% | 74% | 7.2 † |
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 Ballyshannon → Gweedore, km/h | Headwind > 15 km/h, Ballyshannon → Gweedore | Headwind > 15 km/h, Gweedore → Ballyshannon | Better way |
|---|---|---|---|---|
| January | +6.6 | 8% | 28% | Ballyshannon → Gweedore |
| February | +6.8 | 8% | 30% | Ballyshannon → Gweedore |
| March | +3.6 | 11% | 23% | Ballyshannon → Gweedore |
| April | +1.5 | 12% | 18% | either |
| May | +1.2 | 12% | 18% | either |
| June | +0.4 | 11% | 15% | either |
| July | +1.1 | 9% | 14% | either |
| August | +2.8 | 9% | 19% | Ballyshannon → Gweedore |
| September | +3.7 | 10% | 22% | Ballyshannon → Gweedore |
| October | +5.8 | 7% | 26% | Ballyshannon → Gweedore |
| November | +4.4 | 10% | 24% | Ballyshannon → Gweedore |
| December | +6.8 | 8% | 29% | Ballyshannon → Gweedore |
Along the route (sections of about 25 km)
| km | Heading | Tailwind in September, km/h |
|---|---|---|
| 2,065–2,090 | N | +5.6 |
| 2,090–2,116 | NW | −0.4 |
| 2,116–2,141 | NW | −0.3 |
| 2,141–2,166 | N | +5.1 |
| 2,166–2,186 | NE | +9.4 |
Other stages
- Ballygerry → Trá Mhór 130 km
- Trá Mhór → Midleton 129 km
- Midleton → Clonakilty 137 km
- Clonakilty → near Schull 122 km
- near Schull → Castletownbere 122 km
- Castletownbere → near Killorglin 122 km
- near Killorglin → Killorglin 115 km
- Killorglin → Tralee 109 km
- Tralee → Limerick 120 km
- Limerick → Kilrush 110 km
- Kilrush → Lehinch 120 km
- Lehinch → Galway 127 km
- Galway → near Clifden 121 km
- near Clifden → Westport 109 km
- Westport → near Knocknalower 122 km
- near Knocknalower → near Ballina 121 km
- near Ballina → Ballyshannon 137 km
- Ballyshannon → Gweedore 121 km
- Gweedore → Londonderry County Borough 139 km
- Londonderry County Borough → Cookstown 112 km
- Cookstown → Belfast 96 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.