I-5 South Traffic in Seattle

As of 12:15 am PST, I-5 South in Seattle is averaging 62 mph across 152 sensors, about normal for this time.

Is I-5 South moving right now?

Yes. No stretch of I-5 South in Seattle is under 40 mph right now (as of 12:15 am PST).

Best time to drive I-5 South

Traffic is usually worst on Thursday around 4 pm (about 55 mph). On weekdays the morning slowdown peaks around 8 am (58 mph on Tuesdays) and the evening slowdown around 4 pm (55 mph on Thursdays). Midday (10 am to 2 pm) averages 61 mph. On weekends it is slowest on Saturdays around 4 pm (58 mph).

Typical average speed (mph) on I-5 South 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	62	60	59	60	60	61	62	62	61	60	57	56	58	61	62	62	62
Tue	62	59	58	58	59	61	61	61	61	59	57	55	56	60	62	62	62
Wed	62	60	58	59	60	61	61	61	61	59	56	55	56	59	62	62	62
Thu	62	60	58	58	60	61	61	61	61	59	56	55	55	59	61	62	62
Fri	62	61	61	61	61	61	61	61	60	58	55	55	57	59	61	62	62
Sat	62	62	62	62	62	61	61	61	60	60	60	58	59	59	61	62	62
Sun	62	62	62	62	62	61	61	61	61	61	60	60	60	60	61	62	62

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-5 South in Seattle?

Traffic on I-5 South is usually worst on Thursday around 4 pm (about 55 mph).

What is the best time to drive I-5 South in Seattle?

On weekdays, avoid around 8 am (58 mph on Tuesdays) and around 4 pm (55 mph on Thursdays). Midday (10 am to 2 pm) averages 61 mph, and early mornings and late evenings are fastest.

Is I-5 South busy right now?

As of 12:15 am PST, I-5 South in Seattle is averaging 62 mph across 152 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 · 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 · 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	62	60	59	60	60	61	62	62	61	60	57	56	58	61	62	62	62
Tue	62	59	58	58	59	61	61	61	61	59	57	55	56	60	62	62	62
Wed	62	60	58	59	60	61	61	61	61	59	56	55	56	59	62	62	62
Thu	62	60	58	58	60	61	61	61	61	59	56	55	55	59	61	62	62
Fri	62	61	61	61	61	61	61	61	60	58	55	55	57	59	61	62	62
Sat	62	62	62	62	62	61	61	61	60	60	60	58	59	59	61	62	62
Sun	62	62	62	62	62	61	61	61	61	61	60	60	60	60	61	62	62

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

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