Traffic Predict
I-405 South Traffic in Seattle
As of 5:31 am PST, I-405 South in Seattle is averaging 61 mph across 61 sensors, about normal for this time. The slowest stretch is near Coal Creek Pkwy-, at 12 mph (usually 58 mph). 1 sensor reports stop-and-go traffic under 30 mph.
Open the live map of I-405 South →
Is I-405 South moving right now?
Slow stretches as of 5:31 am PST, and why:
- Near Coal Creek Pkwy-sb: 12 mph, likely rain (about 2.7 mm per hour on radar).
Best time to drive I-405 South
Traffic is usually worst on Tuesday around 8 am (about 50 mph). On weekdays the morning slowdown peaks around 8 am (50 mph on Tuesdays) and the evening slowdown around 5 pm (54 mph on Thursdays). Midday (10 am to 2 pm) averages 60 mph. On weekends it is slowest on Saturdays around 2 pm (60 mph).
| Day | 5am | 6am | 7am | 8am | 9am | 10am | 11am | 12pm | 1pm | 2pm | 3pm | 4pm | 5pm | 6pm | 7pm | 8pm | 9pm |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Mon | 62 | 58 | 54 | 53 | 56 | 60 | 61 | 61 | 60 | 59 | 57 | 56 | 57 | 60 | 62 | 62 | 62 |
| Tue | 61 | 57 | 52 | 50 | 52 | 58 | 61 | 61 | 60 | 57 | 57 | 56 | 55 | 58 | 61 | 62 | 62 |
| Wed | 61 | 57 | 53 | 51 | 54 | 58 | 61 | 61 | 59 | 57 | 57 | 55 | 54 | 57 | 61 | 62 | 62 |
| Thu | 62 | 58 | 53 | 52 | 54 | 58 | 60 | 61 | 59 | 57 | 56 | 55 | 54 | 56 | 60 | 62 | 62 |
| Fri | 62 | 59 | 58 | 57 | 58 | 59 | 59 | 58 | 57 | 56 | 55 | 55 | 55 | 58 | 60 | 61 | 62 |
| Sat | 61 | 62 | 62 | 62 | 61 | 61 | 61 | 60 | 60 | 60 | 60 | 60 | 60 | 61 | 61 | 62 | 62 |
| Sun | 61 | 61 | 62 | 62 | 62 | 61 | 61 | 60 | 60 | 60 | 61 | 61 | 61 | 61 | 62 | 62 | 62 |
Averages of every 5-minute reading we have recorded at this time of the week. Colors match the live map.
Questions
Why is I-405 South slow right now?
Near Coal Creek Pkwy-sb: 12 mph, likely rain (about 2.7 mm per hour on radar).
When is traffic worst on I-405 South in Seattle?
Traffic on I-405 South is usually worst on Tuesday around 8 am (about 50 mph).
What is the best time to drive I-405 South in Seattle?
On weekdays, avoid around 8 am (50 mph on Tuesdays) and around 5 pm (54 mph on Thursdays). Midday (10 am to 2 pm) averages 60 mph, and early mornings and late evenings are fastest.
Is I-405 South busy right now?
As of 5:31 am PST, I-405 South in Seattle is averaging 61 mph across 61 sensors, about normal for this time. The slowest stretch is near Coal Creek Pkwy-, at 12 mph (usually 58 mph). 1 sensor reports stop-and-go traffic under 30 mph.
Plan ahead: Seattle traffic tomorrow · Traffic estimator
Other freeways in Seattle
US-2 East · US-2 West · I-5 North · I-5 South · SR-9 North · SR-9 South · SR-16 East · SR-16 West · SR-18 East · SR-18 West · I-90 East · I-90 West · SR-99 North · SR-99 South · SR-167 North · SR-167 South · I-405 North · SR-509 North · SR-509 South · SR-512 East · SR-512 West · SR-520 East · SR-520 West · SR-522 East · SR-522 West · SR-525 North · SR-525 South