Tailwind Atlas

EuroVelo 1 – Atlantic Coast Route (Portugal), stage 3: Gafanha da Encarnação → Vieira de Leiria

On stage 3 (Gafanha da Encarnação → Vieira de Leiria, 134 km) the best month is August: 92% of days were dry with highs of 10–30 °C, and riding Gafanha da Encarnação → Vieira de Leiria meant an average tailwind of 10.3 km/h (ERA5 2006–2025, 9:00–18:00).

ERA5 2006–2025 · OpenStreetMap · Methodology and sources

← EuroVelo 1 – Atlantic Coast Route (Portugal) (Whole route)

134 kmLength
July–August (peak August)Best months
Gafanha da Encarnação → Vieira de LeiriaBetter direction in the best month
10.3 km/hAverage tailwind in the best month
92%Dry days with 10–30 °C
August · 92%Best summer month
Start: Gafanha da Encarnação · Finish: Vieira de Leiria · Route geometry: OpenStreetMap / Waymarked Trails

Weather by month

MonthGood daysRain days ≥ 1 mmRain, mmAvg highDays ≥ 30 °CDays < 10 °CDaylight, h
January71%26%10414 °C0%4%9.6 †
February74%25%8615 °C0%2%10.6 †
March74%26%9216 °C0%0%11.8
April72%28%9118 °C0%0%13.2
May82%17%5420 °C1%0%14.4
June88%9%2622 °C2%0%15.0
July92%2%624 °C6%0%14.8
August92%2%625 °C6%0%13.8
September86%12%4324 °C2%0%12.4
October75%25%11621 °C0%0%11.1
November72%28%12717 °C0%0%9.9 †
December76%23%11115 °C0%2%9.3 †

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

MonthWind Gafanha da Encarnação → Vieira de Leiria, km/hHeadwind > 15 km/h, Gafanha da Encarnação → Vieira de LeiriaHeadwind > 15 km/h, Vieira de Leiria → Gafanha da EncarnaçãoBetter way
January+1.113%14%either
February+1.613%16%either
March+3.012%19%Gafanha da Encarnação → Vieira de Leiria
April+3.19%17%Gafanha da Encarnação → Vieira de Leiria
May+6.57%27%Gafanha da Encarnação → Vieira de Leiria
June+8.14%29%Gafanha da Encarnação → Vieira de Leiria
July+10.41%35%Gafanha da Encarnação → Vieira de Leiria
August+10.31%34%Gafanha da Encarnação → Vieira de Leiria
September+5.85%20%Gafanha da Encarnação → Vieira de Leiria
October+0.215%11%either
November+1.613%15%either
December−0.616%11%either

Along the route (sections of about 25 km)

kmHeadingTailwind in August, km/h
221–246S+9.6
246–272S+9.9
272–297SE+15.3
297–322S+14.2
322–347SW+3.8
347–356SW+7.1

Other stages

  1. Valença → Matosinhos 126 km
  2. Matosinhos → Gafanha da Encarnação 94 km
  3. Gafanha da Encarnação → Vieira de Leiria 134 km
  4. Vieira de Leiria → Lourinhã 128 km
  5. Lourinhã → Lisbon 142 km
  6. Lisbon → Sines 103 km
  7. Sines → Aljezur 114 km
  8. Aljezur → Albufeira 120 km
  9. 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.