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✈️ Singapore (SIN) ⇄ Seattle (SEA): turbulence forecast

Checking whether your SIN–SEA flight will be bumpy? RideScore samples the live forecast winds at cruise altitude along the actual Singapore–Seattle route and scores every leg of the flight, in plain English.

Live forecast SIN → SEA SEA → SIN
Distance12,979 km / 8,060 mi
Est. flight time~15h 46m
Time difference15h time behind at SEA
AirportsSingapore Changi · Seattle Tacoma Intl

What makes this route bumpy (or not)

Part of this route runs through the tropics, where the main turbulence driver is convection — building storm clouds, especially in the afternoon and in the wet season. Crews routinely deviate around the buildups, so brief detours are normal.

How the forecast works

RideScore reads the same global weather models professionals use (NOAA GFS / ECMWF via Open-Meteo), computes wind shear, jet-stream strength and storm energy at up to 11 points along the SIN–SEA great-circle, and turns it into a simple 0–10 bumpiness score for each leg of your flight — plus recent pilot reports from aircraft that just flew nearby. It's free, with no account and no tracking, and works up to 16 days ahead.

Common questions

Is the SIN to SEA flight usually turbulent?
It varies day to day with the winds aloft. Part of this route runs through the tropics, where the main turbulence driver is convection — building storm clouds, especially in the afternoon and in the wet season. Crews routinely deviate around the buildups, so brief detours are normal. Check the live forecast on RideScore just before you fly — it samples the actual forecast winds along the Singapore–Seattle route at cruise altitude.
How long is the flight from Singapore to Seattle?
The great-circle distance is about 12,979 km (8,060 miles), which works out to roughly 15h 46m in the air depending on winds and routing.
Is turbulence on this route dangerous?
No — turbulence is uncomfortable, not dangerous to the aircraft. Modern jets are built for far worse than anything encountered in normal service, and pilots route around the roughest air. Keep your seatbelt fastened and it is a non-event.

More routes from Singapore (SIN) · More routes from Seattle (SEA)

This page shows typical route characteristics; conditions on your day will differ — run the live forecast. Estimates only, not an aviation weather briefing. © 2026 RideScore · made with ❤️ in Amsterdam · About · Terms