San Marcos, CA Weather Forecast

Local 7-day forecast

73°

Mostly Sunny

Track current conditions, temperature changes, wind, and the full daily outlook for San Marcos, CA in one place.

Thursday, April 23, 2026

Wind: 5 to 10 mph SW

Thursday

Mostly sunny, with a high near 73.

Local 7-day forecast

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: Apr 19, 2026 2:18 PM PDT.

The active forecast window currently covers Apr 23 to Apr 25, 2026 for San Marcos, CA.

Page Snapshot

Page focus: city weather
Forecast window: Apr 23 to Apr 25, 2026
Latest sync: Apr 19, 2026 2:18 PM PDT
Forecast office: SGX
Source: NOAA / NWS

Next High

73°F

Thursday

Next Low

52°F

Thursday Night

Rain Outlook

Periods mentioning precipitation

Windiest

5 to 10 mph

Thursday

Daily Outlook

Today

Apr 23

Mostly Sunny

73 °F

/ 52°F

Wind 5 to 10 mph

Fri

Apr 24

Mostly Sunny

71 °F

/ 54°F

Wind 5 to 10 mph

Sat

Apr 25

Partly Sunny

69 °F

/ 53°F

Wind 5 to 10 mph

This Week in San Marcos

Thursday looks like the warmest upcoming period in San Marcos at 73 degrees F.

Thursday Night is the coolest period ahead with temperatures near 52 degrees F.

The strongest winds are forecast for Thursday at about 5 to 10 mph SW.

The forecast from Apr 23 through Apr 25 stays mostly dry.

Forecast Details

Last updated: Apr 19, 2026 2:18 PM PDT
Coverage: 4 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 source

Extended Forecast

Thursday Night

Apr 23

52°F

Partly Cloudy

5 to 10 mph S

Partly cloudy, with a low around 52.

Friday

Apr 24

71°F

Mostly Sunny

5 to 10 mph S

Mostly sunny, with a high near 71.

Friday Night

Apr 24

54°F

Mostly Cloudy

5 to 10 mph SW

Mostly cloudy, with a low around 54.

Saturday

Apr 25

69°F

Partly Sunny

5 to 10 mph W

Partly sunny, with a high near 69.

Saturday Night

Apr 25

53°F

Mostly Cloudy

5 to 10 mph W

Mostly cloudy, with a low around 53.

Detailed Forecast

Period	Conditions	Temp	Wind	Details
Thursday Apr 23	Mostly Sunny	73°F	5 to 10 mph SW	Mostly sunny, with a high near 73.
Thursday Night Apr 23	Partly Cloudy	52°F	5 to 10 mph S	Partly cloudy, with a low around 52.
Friday Apr 24	Mostly Sunny	71°F	5 to 10 mph S	Mostly sunny, with a high near 71.
Friday Night Apr 24	Mostly Cloudy	54°F	5 to 10 mph SW	Mostly cloudy, with a low around 54.
Saturday Apr 25	Partly Sunny	69°F	5 to 10 mph W	Partly sunny, with a high near 69.
Saturday Night Apr 25	Mostly Cloudy	53°F	5 to 10 mph W	Mostly cloudy, with a low around 53.

Nearby Forecasts

Explore weather pages for nearby cities and major places around San Marcos.

Region Links

San Diego County weather

County forecast page

California weather

Statewide weather overview

United States weather

National weather entry point

San Marcos nima4 image

Weather data provided by the National Weather Service (NOAA). Forecast pages update automatically as new periods are synced for each supported U.S. location.