Tailwind Atlas

EuroVelo 2 – Capitals Route (United Kingdom), stage 7: London → Harwich

On stage 7 (London → Harwich, 182 km) the best month is September: 81% of days were dry with highs of 10–30 °C, and riding London → Harwich meant an average tailwind of 4.4 km/h (ERA5 2006–2025, 9:00–18:00).

ERA5 2006–2025 · OpenStreetMap · Methodology and sources

← EuroVelo 2 – Capitals Route (United Kingdom) (Whole route)

182 kmLength
June, September (peak September)Best months
London → HarwichBetter direction in the best month
4.4 km/hAverage tailwind in the best month
81%Dry days with 10–30 °C
June · 80%Best summer month
Start: London · Finish: Harwich · Route geometry: OpenStreetMap / Waymarked Trails

Weather by month

MonthGood daysRain days ≥ 1 mmRain, mmAvg highDays ≥ 30 °CDays < 10 °CDaylight, h
January14%20%567 °C0%79%8.3 †
February21%21%508 °C0%73%9.9 †
March43%21%4510 °C0%50%11.7
April68%20%3713 °C0%18%13.8
May74%25%5716 °C0%2%15.6
June80%20%5619 °C0%0%16.7
July76%23%6122 °C1%0%16.2
August77%22%6421 °C1%0%14.6
September81%19%4619 °C0%0%12.6
October76%22%6515 °C0%3%10.5 †
November47%21%6211 °C0%40%8.7 †
December22%20%618 °C0%67%7.8 †

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 London → Harwich, km/hHeadwind > 15 km/h, London → HarwichHeadwind > 15 km/h, Harwich → LondonBetter way
January+7.56%30%London → Harwich
February+5.711%29%London → Harwich
March+2.614%23%London → Harwich
April−0.115%16%either
May+1.213%18%either
June+2.79%20%London → Harwich
July+6.14%25%London → Harwich
August+6.64%26%London → Harwich
September+4.47%23%London → Harwich
October+5.77%26%London → Harwich
November+6.56%27%London → Harwich
December+8.46%34%London → Harwich

Along the route (sections of about 25 km)

kmHeadingTailwind in September, km/h
674–676SE+2.9
676–701N+2.7
701–726NE+5.3
726–752E+3.7
752–777E+4.5
777–802NE+5.0
802–827E+5.5
827–852E+5.5
852–856NW−2.4

Other stages

  1. Holyhead → Porthmadog 110 km
  2. Porthmadog → Llanidloes 112 km
  3. Llanidloes → Abergavenny 122 km
  4. Abergavenny → Trowbridge 116 km
  5. Trowbridge → Reading 112 km
  6. Reading → London 102 km
  7. London → Harwich 182 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.