Marginal conditions

Delémont — 825m

Jura · Orientation S
43%
Local flying
Best window: 6h — 8h
Local flying reaches 43% because launch wind and basic weather stay usable, but the day does not generate enough lift to feel easy or rewarding for long.
Local window 6h — 8hXC window No clear XC window
Forecast-based estimate — not a flight clearance. Always check live conditions and assess on site.
Save this forecast to your account for quick access later.
Send this forecast to a flying buddy.
Launch wind
13 km/h
W · 278°
Gust spread
31 km/h
rough launch feel
Lift quality
0.1 m/s
0/5 climb support
Cloud base
1518 m
41.3 km
Precipitation risk
Dry
no signal
Marginal conditions

Delémont — 825m

Jura · Orientation S

Save this forecast to your account for quick access later.
Send this forecast to a flying buddy.

Hourly windows

2026-08-18 · Local flying
6h
🌙
NIGHT
7h
☁️
GO
8h
☁️
GO
9h
⛅
MARGINAL
10h
⛅
MARGINAL
11h
⛅
MARGINAL
12h
☁️
MARGINAL
13h
☁️
MARGINAL
14h
☁️
MARGINAL
15h
☁️
MARGINAL
16h
☁️
MARGINAL
17h
☁️
MARGINAL
18h
☁️
MARGINAL
19h
☁️
MARGINAL
20h
☁️
MARGINAL
Best window: 6h — 8h
AI analysis
No analysis available for this day.

📊 Wind & thermals aloft

🎓 Full view
💡
Overview: colored arrows show wind speed and direction. Yellow to orange cells highlight the active thermal layer. The LAUNCH line marks the takeoff altitude.
Alt.6h7h8h9h10h11h12h13h14h15h16h17h18h
Top
BLH
——
875m
1210m
2370m
2450m
2570m
2655m
2640m
2710m
2760m
2630m
2155m
Base
clouds
——
1313m
1538m
1875m
2175m
2338m
2425m
2488m
2525m
2575m
2538m
2487m
3600m
↘
53
↘
52
↘
51
↘
47
↘
43
↘
40
↘
41
↘
44
↘
45
↘
46
↘
45
↘
45
↘
43
3400m
↘
48
↘
47
↘
48
↘
45
↘
41
↘
39
↘
39
↘
41
↘
43
↘
43
↘
43
↘
43
↘
42
3200m
↘
42
↘
42
↘
44
↘
42
↘
39
↘
37
↘
38
↘
39
↘
40
↘
40
↘
40
↘
41
↘
40
3000m
↘
38
↘
39
↘
42
↘
41
↘
38
↘
36
↘
36
↘
36
↘
36
↘
37
↘
37
↘
38
↘
37
2800m
↘
36
↘
36
↘
40
↘
39
↘
37
↘
35
↘
34
↘
33
↘
33
↘
34
→
34
→
35
→
33
2600m
↘
33
↘
33
↘
38
↘
38
↘
35
↘
33
↘
32
↘
30
↘
30
→
30
→
31
→
32
→
30
2400m
↘
30
↘
31
↘
36
↘
36
↘
34
↘
32
↘
30
→
27
→
26
→
27
→
28
→
29
→
26
2200m
↘
27
↘
28
↘
35
↘
35
↘
33
↘
31
→
28
→
24
→
23
→
23
↗
25
↗
26
↗
23
2000m
↘
25
↘
26
↘
33
↘
33
↘
31
↘
29
→
26
→
22
→
20
↗
20
↗
22
↗
23
↗
20
1800m
↘
26
→
27
↘
31
↘
30
↘
29
→
27
→
24
→
20
→
19
→
19
→
20
→
21
→
20
1600m
→
27
→
28
↘
29
→
28
→
26
→
24
→
21
→
19
→
18
→
18
→
18
→
19
→
20
1400m
→
25
→
27
→
27
→
26
→
24
→
22
→
20
→
18
→
17
→
17
→
18
→
19
→
19
1200m
→
22
→
24
→
25
→
25
→
23
→
22
→
20
→
18
→
17
→
17
→
18
→
19
→
19
1000m
→
18
→
20
→
22
→
22
→
22
→
21
→
20
→
17
→
16
→
17
→
18
→
19
→
18
800mLAUNCH
→
13
↗
14
→
14
→
15
→
18
→
20
→
19
→
17
→
15
→
16
→
17
→
18
→
17
600m
400m
200m
0m
0–56–1011–1516–2021–25>25km/hBLH topCloud baseThermals

💨 Wind at launch

🎓 Safety thresholds
💡
Mean wind is the constant speed. Gusts are sudden accelerations. Thresholds: 15 km/h = caution, 25 km/h = critical.

🌡 Temperature

🎓 Why it matters?
💡
Launch temperature affects your comfort and safety. Below 0°C, your fingers go numb and handling controls becomes difficult.

💧 Precipitation

🎓 Impact on the wing
⚠️
Golden rule: never fly in rain or snow. Water weighs down the wing (up to +5 kg), alters its aerodynamic profile and reduces lift. Snow can freeze on suspension lines.
Snow Rain/Showers
Updated 77h ago

Sources: Open-Meteo (AROME 1.3km, ICON-D2 2km) · 2026-08-18
⚠️ This report is informational only. The final decision to fly always rests with the pilot on site.