I-405 North Traffic in Seattle

As of 5:31 am PST, I-405 North in Seattle is averaging 62 mph across 64 sensors, about normal for this time.

Is I-405 North moving right now?

Yes. No stretch of I-405 North in Seattle is under 40 mph right now (as of 5:31 am PST).

Best time to drive I-405 North

Traffic is usually worst on Friday around 4 pm (about 50 mph). On weekdays the morning slowdown peaks around 8 am (56 mph on Wednesdays) and the evening slowdown around 4 pm (50 mph on Fridays). Midday (10 am to 2 pm) averages 59 mph. On weekends it is slowest on Saturdays around 2 pm (60 mph).

Typical average speed (mph) on I-405 North in Seattle, by day and hour (local time)
Day	5am	6am	7am	8am	9am	10am	11am	12pm	1pm	2pm	3pm	4pm	5pm	6pm	7pm	8pm	9pm
Mon	61	60	58	56	57	59	61	61	59	59	56	54	55	60	62	62	62
Tue	61	59	57	56	57	58	60	61	60	58	55	52	51	56	60	62	62
Wed	61	59	57	56	56	58	60	60	59	57	55	53	51	55	60	62	62
Thu	61	60	57	56	57	59	60	60	59	57	54	51	50	56	60	62	62
Fri	62	60	58	58	59	60	59	58	56	54	51	50	53	58	60	62	62
Sat	62	62	62	62	61	61	61	60	60	60	60	60	60	61	62	62	62
Sun	62	62	62	62	62	62	61	61	60	60	60	60	60	61	61	62	61

Averages of every 5-minute reading we have recorded at this time of the week. Colors match the live map.

Questions

When is traffic worst on I-405 North in Seattle?

Traffic on I-405 North is usually worst on Friday around 4 pm (about 50 mph).

What is the best time to drive I-405 North in Seattle?

On weekdays, avoid around 8 am (56 mph on Wednesdays) and around 4 pm (50 mph on Fridays). Midday (10 am to 2 pm) averages 59 mph, and early mornings and late evenings are fastest.

Is I-405 North busy right now?

As of 5:31 am PST, I-405 North in Seattle is averaging 62 mph across 64 sensors, about normal for this time.

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 South · 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

Day	5am	6am	7am	8am	9am	10am	11am	12pm	1pm	2pm	3pm	4pm	5pm	6pm	7pm	8pm	9pm
Mon	61	60	58	56	57	59	61	61	59	59	56	54	55	60	62	62	62
Tue	61	59	57	56	57	58	60	61	60	58	55	52	51	56	60	62	62
Wed	61	59	57	56	56	58	60	60	59	57	55	53	51	55	60	62	62
Thu	61	60	57	56	57	59	60	60	59	57	54	51	50	56	60	62	62
Fri	62	60	58	58	59	60	59	58	56	54	51	50	53	58	60	62	62
Sat	62	62	62	62	61	61	61	60	60	60	60	60	60	61	62	62	62
Sun	62	62	62	62	62	62	61	61	60	60	60	60	60	61	61	62	61

Day	5am	6am	7am	8am	9am	10am	11am	12pm	1pm	2pm	3pm	4pm	5pm	6pm	7pm	8pm	9pm
Mon	61	60	58	56	57	59	61	61	59	59	56	54	55	60	62	62	62
Tue	61	59	57	56	57	58	60	61	60	58	55	52	51	56	60	62	62
Wed	61	59	57	56	56	58	60	60	59	57	55	53	51	55	60	62	62
Thu	61	60	57	56	57	59	60	60	59	57	54	51	50	56	60	62	62
Fri	62	60	58	58	59	60	59	58	56	54	51	50	53	58	60	62	62
Sat	62	62	62	62	61	61	61	60	60	60	60	60	60	61	62	62	62
Sun	62	62	62	62	62	62	61	61	60	60	60	60	60	61	61	62	61

Day	5am	6am	7am	8am	9am	10am	11am	12pm	1pm	2pm	3pm	4pm	5pm	6pm	7pm	8pm	9pm
Mon	61	60	58	56	57	59	61	61	59	59	56	54	55	60	62	62	62
Tue	61	59	57	56	57	58	60	61	60	58	55	52	51	56	60	62	62
Wed	61	59	57	56	56	58	60	60	59	57	55	53	51	55	60	62	62
Thu	61	60	57	56	57	59	60	60	59	57	54	51	50	56	60	62	62
Fri	62	60	58	58	59	60	59	58	56	54	51	50	53	58	60	62	62
Sat	62	62	62	62	61	61	61	60	60	60	60	60	60	61	62	62	62
Sun	62	62	62	62	62	62	61	61	60	60	60	60	60	61	61	62	61