Best Time to Drive from San Marcos to San Diego

Right now (11:50 pm PDT): about 31 minutes via I-15 South and SR-163 South.

Only 61% 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.

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	38	34	34	34	34	34	35	36	35	32	32	32	32
Tue	31	33	41	52	45	36	35	34	34	34	36	40	41	35	32	32	31
Wed	31	33	39	50	43	35	34	34	33	34	36	39	40	36	32	32	32
Thu	31	33	39	49	42	35	34	34	34	34	36	39	40	34	32	32	31
Fri	31	33	36	40	34	34	34	34	34	34	37	38	36	32	32	32	32
Sat	31	32	33	32	32	32	33	33	34	33	33	33	32	32	32	32	32
Sun	31	32	31	31	32	32	32	32	33	32	32	32	32	32	32	32	32

About this drive

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 52 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 1 pm on Saturdays (34 minutes).

About 34 miles of it is freeway, where times follow typical and live traffic from our sensors, and about 1.8 miles surface streets (2 to 5 minutes on weekdays), estimated from how jammed the freeways around them are at that time. Drive times are measured from central San Marcos to downtown San Diego along the route on the map. Starting or ending elsewhere in a big city can add or save several minutes.

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 52 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 52 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 52 minutes.

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) · San Marcos to Anaheim · San Marcos to Riverside · San Marcos to Santa Ana · San Marcos to Chula Vista · San Marcos to Irvine · San Marcos to San Bernardino · San Marcos to Fontana · San Marcos to Moreno Valley · San Marcos to Huntington Beach · San Marcos to Oceanside · San Marcos to Garden Grove

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	38	34	34	34	34	34	35	36	35	32	32	32	32
Tue	31	33	41	52	45	36	35	34	34	34	36	40	41	35	32	32	31
Wed	31	33	39	50	43	35	34	34	33	34	36	39	40	36	32	32	32
Thu	31	33	39	49	42	35	34	34	34	34	36	39	40	34	32	32	31
Fri	31	33	36	40	34	34	34	34	34	34	37	38	36	32	32	32	32
Sat	31	32	33	32	32	32	33	33	34	33	33	33	32	32	32	32	32
Sun	31	32	31	31	32	32	32	32	33	32	32	32	32	32	32	32	32

Leave	5am	6am	7am	8am	9am	10am	11am	12pm	1pm	2pm	3pm	4pm	5pm	6pm	7pm	8pm	9pm
Mon	31	33	38	46	38	34	34	34	34	34	35	36	35	32	32	32	32
Tue	31	33	41	52	45	36	35	34	34	34	36	40	41	35	32	32	31
Wed	31	33	39	50	43	35	34	34	33	34	36	39	40	36	32	32	32
Thu	31	33	39	49	42	35	34	34	34	34	36	39	40	34	32	32	31
Fri	31	33	36	40	34	34	34	34	34	34	37	38	36	32	32	32	32
Sat	31	32	33	32	32	32	33	33	34	33	33	33	32	32	32	32	32
Sun	31	32	31	31	32	32	32	32	33	32	32	32	32	32	32	32	32

Leave	5am	6am	7am	8am	9am	10am	11am	12pm	1pm	2pm	3pm	4pm	5pm	6pm	7pm	8pm	9pm
Mon	31	33	38	46	38	34	34	34	34	34	35	36	35	32	32	32	32
Tue	31	33	41	52	45	36	35	34	34	34	36	40	41	35	32	32	31
Wed	31	33	39	50	43	35	34	34	33	34	36	39	40	36	32	32	32
Thu	31	33	39	49	42	35	34	34	34	34	36	39	40	34	32	32	31
Fri	31	33	36	40	34	34	34	34	34	34	37	38	36	32	32	32	32
Sat	31	32	33	32	32	32	33	33	34	33	33	33	32	32	32	32	32
Sun	31	32	31	31	32	32	32	32	33	32	32	32	32	32	32	32	32