Best Time to Drive from San Marcos to San Diego

Right now (6:24 pm PDT): about 38 minutes via I-15 South and SR-163 South, usually 32 at this time.

Only 66% of this drive is measured by working traffic sensors right now. The rest is estimated from nearby sensors, typical speeds and street traffic, so times can be off. Why so few sensors work.

On weekdays the 35-mile drive from San Marcos to San Diego (via I-15 South and SR-163 South) usually takes as little as 31 minutes and up to 51 minutes, when leaving around 8 am on Tuesdays. The fastest times to leave are before 6:30 am or after 6 pm. Midday (11 am to 2 pm) it takes about 34 minutes. On weekends it is slowest around 12 pm on Saturdays (33 minutes).

⇄ Reverse trip: San Diego to San Marcos

Freeway, about 34 miles: times follow typical and live traffic from our sensors. Surface streets, about 1.8 miles: 2 to 4 minutes on weekdays, estimated from how jammed the freeways around them are at that time (we don't have street sensors yet). Drive times are measured from central San Marcos to downtown San Diego along the route shown. Starting or ending elsewhere in a big city can add or save several minutes.

Typical drive time by departure time

Minutes from San Marcos to San Diego by day and time you leave (local time)
Leave	5am	6am	7am	8am	9am	10am	11am	12pm	1pm	2pm	3pm	4pm	5pm	6pm	7pm	8pm	9pm
Mon	31	33	38	46	40	34	34	34	34	34	35	36	35	32	32	32	32
Tue	31	33	40	51	45	36	34	34	33	34	37	40	41	35	32	32	31
Wed	31	33	38	48	41	35	34	33	33	34	36	40	41	36	32	32	31
Thu	31	33	39	51	43	34	34	34	34	34	36	39	41	34	32	32	31
Fri	31	33	35	40	34	34	34	34	34	34	39	38	36	32	32	32	31
Sat	32	32	33	32	33	33	33	33	33	33	33	33	32	32	32	32	31
Sun	31	31	31	31	32	32	33	33	33	32	32	32	32	32	32	32	31

Simulated from typical freeway speeds at each point of the drive for the time you would reach it, from every 5-minute reading we have recorded. We don't have sensors on surface streets yet, so the time on them is estimated from how congested the freeways around each end of the drive are at that time, in both directions: streets jam when the freeways do.

Questions

What is the best time to drive from San Marcos to San Diego?

On weekdays, leave before 6:30 am or after 6 pm. The drive usually takes about 31 minutes then, versus up to 51 minutes at the worst times.

How long does it take to drive from San Marcos to San Diego?

The 35-mile drive usually takes 31 to 51 minutes on weekdays, depending on when you leave, and about 34 minutes midday.

When is traffic worst from San Marcos to San Diego?

Leaving around 8 am on Tuesdays is usually slowest, about 51 minutes.

Estimate this drive for any day and departure time →

Freeways on this drive

I-15 South in San Diego (23 miles) · SR-163 South in San Diego (11 miles)

San Diego traffic right now · San Diego traffic tomorrow

More drives

San Diego to San Marcos (return trip)

Open the live traffic map →

Leave	5am	6am	7am	8am	9am	10am	11am	12pm	1pm	2pm	3pm	4pm	5pm	6pm	7pm	8pm	9pm
Mon	31	33	38	46	40	34	34	34	34	34	35	36	35	32	32	32	32
Tue	31	33	40	51	45	36	34	34	33	34	37	40	41	35	32	32	31
Wed	31	33	38	48	41	35	34	33	33	34	36	40	41	36	32	32	31
Thu	31	33	39	51	43	34	34	34	34	34	36	39	41	34	32	32	31
Fri	31	33	35	40	34	34	34	34	34	34	39	38	36	32	32	32	31
Sat	32	32	33	32	33	33	33	33	33	33	33	33	32	32	32	32	31
Sun	31	31	31	31	32	32	33	33	33	32	32	32	32	32	32	32	31

Leave	5am	6am	7am	8am	9am	10am	11am	12pm	1pm	2pm	3pm	4pm	5pm	6pm	7pm	8pm	9pm
Mon	31	33	38	46	40	34	34	34	34	34	35	36	35	32	32	32	32
Tue	31	33	40	51	45	36	34	34	33	34	37	40	41	35	32	32	31
Wed	31	33	38	48	41	35	34	33	33	34	36	40	41	36	32	32	31
Thu	31	33	39	51	43	34	34	34	34	34	36	39	41	34	32	32	31
Fri	31	33	35	40	34	34	34	34	34	34	39	38	36	32	32	32	31
Sat	32	32	33	32	33	33	33	33	33	33	33	33	32	32	32	32	31
Sun	31	31	31	31	32	32	33	33	33	32	32	32	32	32	32	32	31

Leave	5am	6am	7am	8am	9am	10am	11am	12pm	1pm	2pm	3pm	4pm	5pm	6pm	7pm	8pm	9pm
Mon	31	33	38	46	40	34	34	34	34	34	35	36	35	32	32	32	32
Tue	31	33	40	51	45	36	34	34	33	34	37	40	41	35	32	32	31
Wed	31	33	38	48	41	35	34	33	33	34	36	40	41	36	32	32	31
Thu	31	33	39	51	43	34	34	34	34	34	36	39	41	34	32	32	31
Fri	31	33	35	40	34	34	34	34	34	34	39	38	36	32	32	32	31
Sat	32	32	33	32	33	33	33	33	33	33	33	33	32	32	32	32	31
Sun	31	31	31	31	32	32	33	33	33	32	32	32	32	32	32	32	31