San Marcos, CA Weather Forecast
Local 7-day forecast
Patchy Fog
Track current conditions, temperature changes, wind, and the full daily outlook for San Marcos, CA in one place.
Patchy fog. Mostly cloudy, with a low around 62. Southwest wind around 0 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: Jul 8, 2026 6:53 AM PDT.
The active forecast window currently covers Jul 8 to Jul 14, 2026 for San Marcos, CA.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Jul 8 to Jul 14, 2026
- Latest sync
- Jul 8, 2026 6:53 AM PDT
- Forecast office
- SGX
- Source
- NOAA / NWS
Daily Outlook
This Week in San Marcos
Tuesday looks like the warmest upcoming period in San Marcos at 83 degrees F.
Overnight is the coolest period ahead with temperatures near 62 degrees F.
The strongest winds are forecast for Wednesday at about 0 to 10 mph W.
Precipitation is mentioned in 1 upcoming forecast period.
Forecast Details
- Last updated
- Jul 8, 2026 6:53 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
Patchy fog before 8am, then haze and patchy fog between 8am and 2pm. Sunny, with a high near 81. West wind 0 to 10 mph.
Patchy fog after 2am. Mostly clear, with a low around 64. Southwest wind 0 to 5 mph.
Patchy fog before 8am, then haze between 8am and 2pm. Sunny, with a high near 82. South wind 0 to 10 mph.
Patchy fog after 11pm. Partly cloudy, with a low around 64. Southwest wind 0 to 5 mph.
Patchy fog before 11am. Mostly sunny, with a high near 81.
Patchy fog after 11pm. Partly cloudy, with a low around 64.
Patchy fog before 11am. Partly sunny, with a high near 79.
Mostly cloudy, with a low around 65.
Partly sunny, with a high near 80.
A slight chance of rain showers between 11pm and 5am. Mostly cloudy, with a low around 66.
Mostly sunny, with a high near 81.
Partly cloudy, with a low around 68.
Mostly sunny, with a high near 83.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Overnight
Jul 8
|
Patchy Fog
|
62°F |
0 mph
|
|
Wednesday
Jul 8
|
Patchy Fog then Haze
|
81°F |
0 to 10 mph
W
|
|
Wednesday Night
Jul 8
|
Mostly Clear then Patchy Fog
|
64°F |
0 to 5 mph
SW
|
|
Thursday
Jul 9
|
Patchy Fog then Haze
|
82°F |
0 to 10 mph
S
|
|
Thursday Night
Jul 9
|
Patchy Fog
|
64°F |
0 to 5 mph
SW
|
|
Friday
Jul 10
|
Patchy Fog then Mostly Sunny
|
81°F |
0 to 10 mph
S
|
|
Friday Night
Jul 10
|
Patchy Fog
|
64°F |
0 to 5 mph
S
|
|
Saturday
Jul 11
|
Patchy Fog then Partly Sunny
|
79°F |
0 to 10 mph
S
|
|
Saturday Night
Jul 11
|
Mostly Cloudy
|
65°F |
0 to 5 mph
NW
|
|
Sunday
Jul 12
|
Partly Sunny
|
80°F |
0 to 10 mph
W
|
|
Sunday Night
Jul 12
|
Slight Chance Rain Showers
|
66°F |
0 to 5 mph
NW
|
|
Monday
Jul 13
|
Mostly Sunny
|
81°F |
0 to 10 mph
W
|
|
Monday Night
Jul 13
|
Partly Cloudy
|
68°F |
0 to 10 mph
NW
|
|
Tuesday
Jul 14
|
Mostly Sunny
|
83°F |
0 to 10 mph
NW
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around San Marcos.
