Véloroute Les Sables d’Olonne - Bressuire: which way and when to ride
The best month for Véloroute Les Sables d’Olonne - Bressuire is September: 80% of days were dry with highs of 10–30 °C. In September the wind barely favours either direction — on average 1.5 km/h along the route (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 | 28% | 24% | 79 | 9 °C | 0% | 56% | 8.9 † |
| February | 43% | 23% | 64 | 10 °C | 0% | 41% | 10.2 † |
| March | 61% | 26% | 65 | 13 °C | 0% | 19% | 11.8 |
| April | 77% | 22% | 53 | 16 °C | 0% | 3% | 13.5 |
| May | 74% | 25% | 65 | 19 °C | 0% | 0% | 15.0 |
| June | 73% | 22% | 56 | 23 °C | 6% | 0% | 15.8 |
| July | 75% | 14% | 38 | 25 °C | 11% | 0% | 15.5 |
| August | 75% | 14% | 38 | 24 °C | 11% | 0% | 14.2 |
| September | 80% | 17% | 49 | 22 °C | 4% | 0% | 12.5 |
| October | 77% | 22% | 78 | 18 °C | 0% | 1% | 10.8 † |
| November | 58% | 27% | 86 | 13 °C | 0% | 18% | 9.3 † |
| December | 35% | 25% | 83 | 10 °C | 0% | 46% | 8.6 † |
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 Les Sables d’Olonne → Bressuire, km/h | Headwind > 15 km/h, Les Sables d’Olonne → Bressuire | Headwind > 15 km/h, Bressuire → Les Sables d’Olonne | Better way |
|---|---|---|---|---|
| January | +3.1 | 7% | 20% | Les Sables d’Olonne → Bressuire |
| February | +2.9 | 9% | 20% | Les Sables d’Olonne → Bressuire |
| March | +2.0 | 10% | 19% | Les Sables d’Olonne → Bressuire |
| April | +0.7 | 10% | 13% | either |
| May | +2.6 | 8% | 18% | Les Sables d’Olonne → Bressuire |
| June | +2.9 | 5% | 15% | Les Sables d’Olonne → Bressuire |
| July | +5.1 | 5% | 21% | Les Sables d’Olonne → Bressuire |
| August | +4.4 | 4% | 16% | Les Sables d’Olonne → Bressuire |
| September | +1.5 | 7% | 13% | either |
| October | +1.5 | 7% | 14% | either |
| November | +3.1 | 6% | 18% | Les Sables d’Olonne → Bressuire |
| December | +3.2 | 8% | 20% | Les Sables d’Olonne → Bressuire |
Along the route (sections of about 25 km)
| km | Heading | Tailwind in September, km/h |
|---|---|---|
| 0–25 | N | −2.9 |
| 25–51 | E | +3.9 |
| 51–76 | E | +3.1 |
| 76–101 | NE | +1.3 |
| 101–126 | E | +2.0 |
| 126–152 | SE | +2.2 |
| 152–177 | E | +2.1 |
| 177–202 | E | +1.6 |
| 202–222 | NE | +0.2 |
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.