EuroVelo 1 – Atlantic Coast Route (Portugal), stage 4: Vieira de Leiria → Lourinhã
On stage 4 (Vieira de Leiria → Lourinhã, 128 km) the best month is July: 95% of days were dry with highs of 10–30 °C, and riding Vieira de Leiria → Lourinhã meant an average tailwind of 6.3 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 | 76% | 21% | 79 | 14 °C | 0% | 4% | 9.7 † |
| February | 77% | 22% | 67 | 15 °C | 0% | 2% | 10.7 † |
| March | 75% | 25% | 76 | 16 °C | 0% | 0% | 11.8 |
| April | 76% | 24% | 71 | 18 °C | 0% | 0% | 13.2 |
| May | 86% | 13% | 42 | 20 °C | 1% | 0% | 14.3 |
| June | 92% | 7% | 18 | 21 °C | 2% | 0% | 14.9 |
| July | 95% | 2% | 4 | 23 °C | 3% | 0% | 14.7 |
| August | 95% | 2% | 4 | 23 °C | 4% | 0% | 13.7 |
| September | 89% | 10% | 32 | 23 °C | 2% | 0% | 12.4 |
| October | 78% | 21% | 83 | 21 °C | 1% | 0% | 11.1 |
| November | 76% | 24% | 98 | 17 °C | 0% | 0% | 9.9 † |
| December | 79% | 19% | 85 | 15 °C | 0% | 1% | 9.4 † |
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 Vieira de Leiria → Lourinhã, km/h | Headwind > 15 km/h, Vieira de Leiria → Lourinhã | Headwind > 15 km/h, Lourinhã → Vieira de Leiria | Better way |
|---|---|---|---|---|
| January | +0.7 | 14% | 15% | either |
| February | +0.7 | 16% | 17% | either |
| March | +1.3 | 16% | 20% | either |
| April | +0.7 | 15% | 16% | either |
| May | +3.2 | 15% | 25% | Vieira de Leiria → Lourinhã |
| June | +4.2 | 13% | 27% | Vieira de Leiria → Lourinhã |
| July | +6.3 | 12% | 32% | Vieira de Leiria → Lourinhã |
| August | +6.5 | 11% | 31% | Vieira de Leiria → Lourinhã |
| September | +3.1 | 10% | 19% | Vieira de Leiria → Lourinhã |
| October | −0.5 | 16% | 12% | either |
| November | +0.9 | 15% | 17% | either |
| December | +0.2 | 15% | 14% | either |
Along the route (sections of about 25 km)
| km | Heading | Tailwind in July, km/h |
|---|---|---|
| 355–371 | SW | +11.5 |
| 371–396 | S | +14.0 |
| 396–421 | SW | +9.2 |
| 421–446 | NW | −14.7 |
| 446–471 | SW | +7.5 |
| 471–484 | S | +18.2 |
Other stages
- Valença → Matosinhos 126 km
- Matosinhos → Gafanha da Encarnação 94 km
- Gafanha da Encarnação → Vieira de Leiria 134 km
- Vieira de Leiria → Lourinhã 128 km
- Lourinhã → Lisbon 142 km
- Lisbon → Sines 103 km
- Sines → Aljezur 114 km
- Aljezur → Albufeira 120 km
- Albufeira → Vila Real de Santo António 124 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.