San Marcos, CA Weather Forecast
Local 7-day forecast
Sunny
Track current conditions, temperature changes, wind, and the full daily outlook for San Marcos, CA in one place.
Sunny, with a high near 95. Southwest wind 0 to 10 mph.
Local Weather Overview
This forecast page for San Marcos, CA is designed for quick trip planning, giving you a clean read on daytime highs, overnight lows, and changing conditions across the upcoming forecast window. Latest sync: Oct 6, 2026 10:26 AM PDT.
The active forecast window currently covers Oct 7 to Oct 12, 2026 for San Marcos, CA.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Oct 7 to Oct 12, 2026
- Latest sync
- Oct 6, 2026 10:26 AM PDT
- Forecast office
- SGX
- Source
- NOAA / NWS
Daily Outlook
This Week in San Marcos
Wednesday looks like the warmest upcoming period in San Marcos at 95 degrees F.
Monday Night is the coolest period ahead with temperatures near 59 degrees F.
The strongest winds are forecast for Wednesday at about 0 to 10 mph SW.
Precipitation is mentioned in 5 upcoming forecast periods.
Forecast Details
- Last updated
- Oct 6, 2026 10:26 AM PDT
- Coverage
- 7 days
- Time zone
- America/Los_Angeles
- Forecast office
- SGX
- Radar station
- KNKX
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
Mostly clear, with a low around 69. Northeast wind 0 to 5 mph.
Sunny, with a high near 93. Northwest wind 0 to 10 mph.
Patchy fog after 5am. Mostly clear, with a low around 68.
Patchy fog before 11am. Sunny, with a high near 90.
Partly cloudy, with a low around 67.
Mostly sunny, with a high near 83.
A slight chance of rain showers after 5am. Partly cloudy, with a low around 64.
A chance of rain showers. Mostly sunny, with a high near 77.
A chance of rain showers. Mostly cloudy, with a low around 61.
A chance of rain showers. Mostly sunny, with a high near 75.
A slight chance of rain showers before 5am. Partly cloudy, with a low around 59.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Wednesday
Oct 7
|
Sunny
|
95°F |
0 to 10 mph
SW
|
|
Wednesday Night
Oct 7
|
Mostly Clear
|
69°F |
0 to 5 mph
NE
|
|
Thursday
Oct 8
|
Sunny
|
93°F |
0 to 10 mph
NW
|
|
Thursday Night
Oct 8
|
Mostly Clear then Patchy Fog
|
68°F |
0 to 5 mph
N
|
|
Friday
Oct 9
|
Patchy Fog then Sunny
|
90°F |
0 to 10 mph
NW
|
|
Friday Night
Oct 9
|
Partly Cloudy
|
67°F |
0 to 5 mph
NW
|
|
Saturday
Oct 10
|
Mostly Sunny
|
83°F |
0 to 10 mph
NW
|
|
Saturday Night
Oct 10
|
Partly Cloudy then Slight Chance Rain Showers
|
64°F |
0 to 5 mph
SW
|
|
Sunday
Oct 11
|
Chance Rain Showers
|
77°F |
0 to 10 mph
SW
|
|
Sunday Night
Oct 11
|
Chance Rain Showers
|
61°F |
5 to 10 mph
SW
|
|
Columbus Day
Oct 12
|
Chance Rain Showers
|
75°F |
5 to 10 mph
SW
|
|
Monday Night
Oct 12
|
Slight Chance Rain Showers
|
59°F |
5 to 10 mph
S
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around San Marcos.
