Tailwind Atlas

Nasjonal sykkelrute 1 Etappe 6: which way and when to ride

The best month for Nasjonal sykkelrute 1 Etappe 6 is June: 74% of days were dry with highs of 10–30 °C. In June, riding Spangereid → Moss meant an average tailwind of 4.4 km/h (ERA5 2006–2025, daytime 9:00–18:00).

ERA5 2006–2025 · OpenStreetMap · Methodology and sources

470 kmLength
May–June, September (peak June)Best months
Spangereid → MossBetter direction in the best month
4.4 km/hAverage tailwind in the best month
74%Dry days with 10–30 °C
June · 74%Best summer month
Start: Spangereid · Finish: Moss · Route geometry: OpenStreetMap / Waymarked Trails

Weather by month

MonthGood daysRain days ≥ 1 mmRain, mmAvg highDays ≥ 30 °CDays < 10 °CDaylight, h
January0%30%1222 °C0%100%7.0 †
February1%27%912 °C0%99%9.2 †
March9%21%755 °C0%91%11.6
April42%20%5510 °C0%55%14.3
May71%23%7714 °C0%10%16.8
June74%26%8618 °C0%0%18.3
July70%30%10820 °C0%0%17.7
August67%33%12519 °C0%0%15.4
September71%28%12716 °C0%0%12.7
October47%31%13211 °C0%34%10.1 †
November9%32%1296 °C0%86%7.6 †
December1%31%1213 °C0%98%6.3 †

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 Spangereid → Moss, km/hHeadwind > 15 km/h, Spangereid → MossHeadwind > 15 km/h, Moss → SpangereidBetter way
January+1.214%19%either
February+1.014%17%either
March+1.214%16%either
April+1.010%13%either
May+2.19%15%Spangereid → Moss
June+4.45%18%Spangereid → Moss
July+4.74%18%Spangereid → Moss
August+4.46%18%Spangereid → Moss
September+3.010%20%Spangereid → Moss
October+2.213%20%Spangereid → Moss
November+0.717%19%either
December+2.411%21%Spangereid → Moss

Stages

The route is split into 4 stages of about 100–150 km between towns; each stage has its own page.

StagekmBest monthTailwind Spangereid → Moss in June, km/h
1. Spangereid → Birkeland116June+5.7
2. Birkeland → Risør120May+3.5
3. Risør → Larvik141June+3.5
4. Larvik → Moss93September+5.2

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.

OpenStreetMap · Waymarked Trails