Your Flight
We analysed more than 15,500 data points along your route from San Francisco International Airport, San Francisco to Lajes Airport, Praia da Vitória.
Tap Air Portugal
SFO
TER
TP240
Tap Air Portugal · Live forecast
SFO
→
TER
87
Calm Score
"A smooth ride ahead — sit back and enjoy."
9h 50m
Duration
4,264 nm
Distance
39,000 ft
Cruise Altitude
HIGH
Confidence
Turbulence comfort along route
Comfort score combines turbulence probability with intensity, higher means rougher
Smooth
Light
Moderate
Severe
Set an alert before your flight
Beta
You still have 19 hours before departure. We'll notify you if this forecast changes.
We know turbulence can feel scary — especially on long flights.
This report is built for you: what bumps feel like, when they happen, and why you'll be completely safe. 1 in 3 passengers feel exactly like you.
Right now on your route
Live pilot reports from aircraft flying SFO → TER
9 pilot reports along this route
9 / 9
Reporting smooth
0 / 9
Light turbulence
0
Moderate or worse
Latest pilot reports
Smooth
ARP THY2AY 4656N05148W 0653 F350 4700N05000W 0702 4800N04000W MS49 334/26 KT TCLLD QXS YYT 170653 L32A
5m ago
Smooth
ARP AFR093 4720N05139W 0650 F370 4800N05000W 0700 4900N04000W MS56 210/37 KT FGSQJ QXS YYT 170650 F79A
8m ago
Smooth
ARP CMB552 4836N05147W 0649 F390 4900N05000W 0658 5000N04000W MS60 223/38 KT N819AX QXS YYT 170649 F26A
9m ago
Smooth
ARP AFR179 4636N05146W 0647 F390 4700N05000W 0657 4800N04000W MS58 233/28 KT FHTYC QXT AME 170648 J35A
11m ago
Smooth
ARP TSC232 4659N05136W 0642 F340 4700N05000W 0650 4700N04000W MS49 218/31 KT CGOIK QXS YYT 170642 J41A
16m ago
AI-powered flight briefing
15,500 data points analyzed
· HIGH confidence
Your Journey Beta
A brief bumpy patch may occur during cruise. It's nothing to worry about - just keep your seatbelt fastened.
Your route takes you over the Sierra Nevada, over the Rocky Mountains, over the Appalachian Mountains, and crossing the North Atlantic Ocean – these areas can sometimes cause turbulence.
Smooth Flight
We're expecting smooth conditions throughout your flight. You can sit back and relax.
Takeoff
Takeoff should feel smooth, with calm conditions around the airport.
Winds Aloft
Winds at cruising altitude are about 44 knots. These winds are favorable and may get you there up to 44 minutes early.
Landing
Landing should feel a bit bumpy on descent with typical approach conditions.
You're in Safe Hands
If you feel nervous at any point, remember that turbulence is expected, safe, and part of normal flying. The crew is monitoring everything, and the aircraft is built to handle far more than anything you will feel. Have a safe and calm flight.
Relaxation Exercises
ZeroTurb Index (ZTI): Powered by our turbulence prediction algorithm combining atmospheric Richardson Number, wind shear analysis, temperature gradients, and geomagnetic activity. Learn more
Flight Timeline 9h 50min
Maximum turbulence expected per segment
Takeoff
Smooth
0:30-1:00
Light
1:00-1:30
Light
1:30-2:00
Light
2:00-2:30
Light
2:30-3:00
Light
3:00-3:30
Light
3:30-4:00
Smooth
4:00-4:30
Light
4:30-4:59
Light
4:59-5:28
Smooth
5:28-5:57
Smooth
5:57-6:26
Light
6:26-6:55
Light
6:55-7:24
Light
7:24-7:53
Light
7:53-8:22
Light
8:22-8:51
Light
8:51-9:20
Light
Landing
Moderate
Smooth
Light
Moderate
Severe
Longer bars indicate higher turbulence intensity. Values shown are the maximum for each time segment.
Airport conditions
Live weather at departure and arrival
SFO
San Francisco International Airport — Departure
Wind
12 kt (270°)
Sky
Clear
Temperature
16°C
Conditions
VFR — Clear conditions, no delays expected
TER
Lajes Airport — Arrival
Wind
2 kt (200°)
Sky
Scattered
Temperature
21°C
Conditions
VFR — Clear conditions, no delays expected
Your flight details
Departure timing and aircraft information
Evening Flight Departure
Time of day
Evening Flight
Tip
Evening and night flights typically offer smoother conditions as thermal activity subsides and the atmosphere stabilizes after sunset.
When
Tomorrow — conditions may change
Data sources & our approach
ZeroTurb's Custom Algorithm: Our proprietary
ZeroTurb Index (ZTI) combines three meteorological indices weighted by their
predictive accuracy — giving you transparent, passenger-focused turbulence probability instead
of vague categories.
This forecast integrates data from:
- ECMWF Open Data — Global atmospheric model (wind/temperature at 13 flight levels)
- NOAA Aviation Weather Center — Pilot Reports (PIREPs), SIGMETs/AIRMETs, TAFs
- NOAA Space Weather Prediction Center — Aurora forecasts for polar routes
- AviationStack API — Flight schedules and airline operational data
Disclaimer: This forecast is for informational purposes only. Always consult official aviation weather sources and follow ATC guidance.