The wind must blow from within this arc. Direction is the same for both wings.
Ideal speed
5–12 mph
Ceiling · Paragliding
≤ 19 mph base · gusts ≤ 23
Top of the range for paragliding (any rating). Switch wings up top to compare. Hang gliders hold roughly 10 mph more than paragliders.
Mt Diablo CA, Juniper Launch (2850ft), Wings of Rogallo. Works SW-W. Major rotor/shear risk in N/NW winds (reserve deploys documented). HG to 25mph. H4/P4 + site intro + waiver required; no launch within 1hr of sunset.
Flyable 11am–6pm — best around 12pm: 7 mph SW, gusts 7. 7 clean hrs, the rest borderline.
🌅 Wonder windGlass-off possible 4pm–6pm — smooth, light SSW ~10 mph (a touch cross), clear evening sky, weak daytime heating.
✓ Light, smooth wind– Edge of the window– Wind dying off into evening✓ Clear skies (radiative cooling)– Day built a thermal layer
MondaySlim windowflyable 6pm🌅 sunset 6:34 PM
7a
10g17
NNE
8a
12g20
N
9a
14g21
N
10a
10g17
N
11a
9g15
NNW
12p
7g12
NNW
1p
7g9
NNW
2p
8g10
NW
3p
8g9
NW
4p
9g10
NNW
5p
8g12
NW
6p
9g11
WNW
Flyable 12pm–2pm — best around 6pm: 9 mph WNW, gusts 11. All borderline — fly it with a close eye.
🌅 Wonder windGlass-off possible 6pm — smooth, light WNW ~9 mph (a touch cross), clear evening sky, the day heated up well.
– Light, smooth wind– Edge of the window– Wind dying off into evening✓ Clear skies (radiative cooling)✓ Day built a thermal layer
TuesdayNot flyableno window🌅 sunset 6:32 PM
7a
12g18
N
8a
13g19
N
9a
13g20
N
10a
13g20
N
11a
12g20
N
12p
10g23
NNE
1p
8g21
N
2p
7g19
N
3p
7g18
NNW
4p
7g17
NNW
5p
7g16
NW
6p
6g17
WNW
Wind's out of the N most of the day — outside the working window, so cross/tail or rotor.
WednesdayFlyableflyable 7am–9am🌅 sunset 6:31 PM
7a
5g8
SW
8a
4g7
SW
9a
3g7
SW
10a
2g8
W
11a
2g9
NW
12p
2g10
NNW
1p
2g11
NNW
2p
2g11
NNW
3p
3g12
NW
4p
5g13
WNW
5p
6g14
WNW
6p
6g13
W
Flyable 7am–12pm — best around 7am: 5 mph SW, gusts 8. 3 clean hrs, the rest borderline.
🌅 Wonder windGlass-off possible 6pm — smooth, light W ~6 mph, clear evening sky, weak daytime heating.
– Light, smooth wind✓ Straight in the window– Wind dying off into evening✓ Clear skies (radiative cooling)– Day built a thermal layer
ThursdayCautionworkable 10am–1pm🌅 sunset 6:29 PM
7a
1g11
SSW
8a
0g11
S
9a
1g11
E
10a
3g10
ENE
11a
4g10
ENE
12p
5g11
ENE
1p
7g13
ENE
2p
7g13
ENE
3p
6g13
ENE
4p
4g12
E
5p
3g11
SE
6p
2g11
S
Borderline only 10am–1pm — best around 12pm: 5 mph ENE, gusts 11. All borderline — fly it with a close eye. Outside the window, light enough for a sledder.
FridayCautionworkable 7am–12pm🌅 sunset 6:28 PM
7a
5g11
SE
8a
5g11
ESE
9a
5g10
ESE
10a
6g10
E
11a
6g10
ENE
12p
6g12
ENE
1p
6g14
ENE
2p
4g15
ENE
3p
2g16
NE
4p
1g15
W
5p
4g15
WSW
6p
4g15
WSW
Borderline only 7am–12pm — best around 9am: 5 mph ESE, gusts 10. All borderline — fly it with a close eye. Outside the window, light enough for a sledder.
SaturdayCautionworkable 8am–11am🌅 sunset 6:27 PM
7a
1g10
ENE
8a
2g10
ENE
9a
3g10
ENE
10a
3g11
ENE
11a
4g11
NE
12p
3g11
NE
1p
3g12
NNE
2p
3g12
N
3p
3g13
NNW
4p
4g13
NW
5p
5g13
WNW
6p
5g14
WNW
Borderline only 8am–11am — best around 8am: 2 mph ENE, gusts 10. All borderline — fly it with a close eye. Outside the window, light enough for a sledder.
Diablo is a paragliding and hang gliding site in California. The launch faces west at 2,874 feet and works best in SW to W wind of about 5 to 12 mph. There are 10 more Wonderwind sites within 50 miles, and the closest is Channing hill - Benicia, 20 miles away. Read the site guide on wingsofrogallo.org for rules and access before you fly.
Conditions are an automated estimate from public forecast models, not a go/no-go call.
Always check the sky, talk to locals, and fly within your rating. You are responsible for your own safety.
