La Littorale : Pointe du Raz - Concarneau: which way and when to ride
The best month for La Littorale : Pointe du Raz - Concarneau is August: 83% of days were dry with highs of 10–30 °C. In August, riding Plogoff → Concarneau meant an average tailwind of 7.1 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 | 27% | 31% | 108 | 10 °C | 0% | 50% | 8.8 † |
| February | 32% | 28% | 89 | 10 °C | 0% | 50% | 10.2 † |
| March | 50% | 27% | 74 | 11 °C | 0% | 31% | 11.8 |
| April | 75% | 19% | 56 | 13 °C | 0% | 7% | 13.6 |
| May | 78% | 22% | 56 | 15 °C | 0% | 0% | 15.1 |
| June | 79% | 21% | 52 | 18 °C | 0% | 0% | 16.0 |
| July | 81% | 19% | 49 | 19 °C | 0% | 0% | 15.7 |
| August | 83% | 16% | 50 | 19 °C | 0% | 0% | 14.3 |
| September | 82% | 18% | 51 | 18 °C | 0% | 0% | 12.5 |
| October | 73% | 26% | 100 | 16 °C | 0% | 1% | 10.7 † |
| November | 56% | 36% | 121 | 13 °C | 0% | 10% | 9.2 † |
| December | 37% | 34% | 124 | 11 °C | 0% | 34% | 8.4 † |
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 Plogoff → Concarneau, km/h | Headwind > 15 km/h, Plogoff → Concarneau | Headwind > 15 km/h, Concarneau → Plogoff | Better way |
|---|---|---|---|---|
| January | +5.5 | 11% | 29% | Plogoff → Concarneau |
| February | +4.4 | 14% | 28% | Plogoff → Concarneau |
| March | +3.2 | 14% | 26% | Plogoff → Concarneau |
| April | +2.4 | 12% | 20% | Plogoff → Concarneau |
| May | +4.9 | 8% | 24% | Plogoff → Concarneau |
| June | +5.5 | 6% | 23% | Plogoff → Concarneau |
| July | +7.9 | 3% | 29% | Plogoff → Concarneau |
| August | +7.1 | 4% | 25% | Plogoff → Concarneau |
| September | +4.0 | 8% | 21% | Plogoff → Concarneau |
| October | +2.6 | 12% | 21% | Plogoff → Concarneau |
| November | +5.4 | 12% | 30% | Plogoff → Concarneau |
| December | +5.6 | 13% | 31% | Plogoff → Concarneau |
Along the route (sections of about 25 km)
| km | Heading | Tailwind in August, km/h |
|---|---|---|
| 0–25 | E | +9.9 |
| 25–50 | SE | +6.8 |
| 50–75 | SE | +5.0 |
| 75–100 | NE | +4.4 |
| 100–126 | E | +8.2 |
| 126–153 | E | +8.1 |
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.