Latest news, May 28, 2026: BumpySkies had an outage between 3 and 9:40 AM Eastern time this morning, which affected its ability to provide some forecasts. I have found the cause, and fixed it so it won't happen again. I apologize if this affected your flight!

HVN99, SFO to SGN, departing 11:32 PM PDT, May 27

Turbulence forecast map for HVN99, SFO to SGN

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(Forecast data last collected at 11:00 AM PDT on May 28, 2026.)

  1. Takeoff from SFO at 11:32 PM PDT, May 27.
  2. 11:33 PM PDT: Calm skies for the next 4 hours and 40 minutes.
  3. 4:13 AM PDT: Light turbulence likely for the next 32 minutes.
  4. 4:45 AM PDT: Calm skies for the next 12 minutes.
  5. 4:57 AM PDT: Light turbulence likely for the next 2 hours and 55 minutes.
  6. 7:52 AM PDT: Moderate turbulence likely for the next 6 minutes.
  7. 7:58 AM PDT: Light turbulence likely for the next 3 minutes.
  8. 8:01 AM PDT: Moderate turbulence likely for the next 32 minutes.
  9. 8:33 AM PDT: Light turbulence likely for the next 33 minutes.
  10. 9:06 AM PDT: Calm skies for the next 27 minutes.
  11. 9:33 AM PDT: Light turbulence likely for the next 8 minutes.
  12. 9:41 AM PDT: Calm skies for the next 13 minutes.
  13. 9:54 AM PDT: Light turbulence likely for the next 7 minutes.
  14. 10:01 AM PDT: Calm skies for the next 32 minutes.
  15. 10:33 AM PDT: Light turbulence likely for the next 24 minutes.
  16. 10:57 AM PDT: Calm skies for the next 3 hours and 4 minutes.
  17. 2:01 PM PDT: Light turbulence likely until you land.
  18. Landing at SGN at 2:24 PM PDT.
Nelly

Nelly says: Bumpy skies can be scary, but they're not dangerous!

See our turbulence safety page for more information, including links to other resources for nervous fliers.

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