Current Conditions

San Marcos, California

77°F25°C

Clear

Wind

WSW 5 mph8 km/h

Humidity

47%

Cloud Cover

As of Wednesday, September 2, 2026 at 10:43 AM PDT

Today's Outlook

Day

Mostly clear and warm, with a high of 80°F26°C and morning low of 68°F20°C. Breezy from the WSW at 6 to 9 mph10 to 15 km/h.

Night

Mostly clear, with a low around 63°F17°C. Light wind from the W around 3 mph5 km/h.

7-Day Forecast

Condition	High (°F)	Low (°F)	Precip (mm)	Cloud Cover (%)	Wind (mph)
Clear	High 80°F26°C	Low 63°F17°C	Precip 0 in0 mm—	Cloud 6%	Wind WSW 5 mph8 km/h	Wednesday: Mostly clear and warm, with a high of 80°F26°C and morning low of 68°F20°C. Breezy from the WSW at 6 to 9 mph10 to 15 km/h. Wednesday Night: Mostly clear, with a low around 63°F17°C. Light wind from the W around 3 mph5 km/h.
Clear	High 79°F26°C	Low 62°F17°C	Precip 0 in0 mm—	Cloud 14%	Wind WSW 4 mph7 km/h	Thursday: Mostly clear and warm, with a high of 79°F26°C and morning low of 67°F20°C. Breezy from the WSW at 6 to 9 mph10 to 14 km/h. Thursday Night: Mostly clear, with a low around 62°F17°C. Light wind from the WSW around 3 mph4 km/h.
Clear	High 80°F27°C	Low 63°F17°C	Precip 0 in0 mm—	Cloud 16%	Wind WSW 4 mph6 km/h	Friday: Mostly clear and warm, with a high of 80°F27°C and morning low of 67°F19°C. Breezy from the WSW at 5 to 8 mph9 to 13 km/h. Friday Night: Mostly clear, with a low around 63°F17°C. Light wind from the WSW around 2 mph4 km/h.
Clear	High 84°F29°C	Low 65°F18°C	Precip 0.01 in0.3 mm9%	Cloud 18%	Wind W 4 mph6 km/h	Saturday: Mostly clear and warm, with a high of 84°F29°C and morning low of 70°F21°C. Breezy from the WSW at 5 to 7 mph8 to 12 km/h. Saturday Night: Mostly clear, with a low around 65°F18°C. Light wind from the NW around 2 mph4 km/h.
Drizzle	High 82°F28°C	Low 71°F21°C	Precip 0.07 in1.8 mm25%	Cloud 37%	Wind WNW 4 mph7 km/h	Sunday: Partly cloudy and warm, with a high of 82°F28°C and morning low of 73°F23°C. Breezy from the W at 6 to 8 mph9 to 12 km/h. 25% chance of drizzle throughout the day. Sunday Night: Partly cloudy, with a low around 71°F21°C. Light wind from the WNW around 3 mph5 km/h. 14% chance of drizzle before dawn.
Clear	High 84°F29°C	Low 68°F20°C	Precip 0 in0.1 mm2%	Cloud 16%	Wind W 4 mph6 km/h	Monday: Mostly clear and warm, with a high of 84°F29°C and morning low of 72°F22°C. Breezy from the WSW at 5 to 8 mph9 to 13 km/h. Monday Night: Mostly clear, with a low around 68°F20°C. Light wind from the WNW around 2 mph4 km/h.
Clear	High 85°F29°C	Low 66°F19°C	Precip 0 in0.1 mm3%	Cloud 18%	Wind W 4 mph7 km/h	Tuesday: Mostly clear and warm, with a high of 85°F29°C and morning low of 70°F21°C. Breezy from the W at 6 to 8 mph9 to 13 km/h. Tuesday Night: Mostly clear, with a low around 66°F19°C. Light wind from the WNW around 3 mph4 km/h.

15-Day Forecast

	Day	High	Low	Precip	Cloud Cover	Condition	Wind
	WednesdaySep 2	80°F26°C	63°F17°C	0 in0 mm· —	6%	Clear	WSW 5 mph8 km/h
DayMostly clear and warm, with a high of 80°F26°C and morning low of 68°F20°C. Breezy from the WSW at 6 to 9 mph10 to 15 km/h. NightMostly clear, with a low around 63°F17°C. Light wind from the W around 3 mph5 km/h.
	ThursdaySep 3	79°F26°C	62°F17°C	0 in0 mm· —	14%	Clear	WSW 4 mph7 km/h
DayMostly clear and warm, with a high of 79°F26°C and morning low of 67°F20°C. Breezy from the WSW at 6 to 9 mph10 to 14 km/h. NightMostly clear, with a low around 62°F17°C. Light wind from the WSW around 3 mph4 km/h.
	FridaySep 4	80°F27°C	63°F17°C	0 in0 mm· —	16%	Clear	WSW 4 mph6 km/h
DayMostly clear and warm, with a high of 80°F27°C and morning low of 67°F19°C. Breezy from the WSW at 5 to 8 mph9 to 13 km/h. NightMostly clear, with a low around 63°F17°C. Light wind from the WSW around 2 mph4 km/h.
	SaturdaySep 5	84°F29°C	65°F18°C	0.01 in0.3 mm· 9%	18%	Clear	W 4 mph6 km/h
DayMostly clear and warm, with a high of 84°F29°C and morning low of 70°F21°C. Breezy from the WSW at 5 to 7 mph8 to 12 km/h. NightMostly clear, with a low around 65°F18°C. Light wind from the NW around 2 mph4 km/h.
	SundaySep 6	82°F28°C	71°F21°C	0.07 in1.8 mm· 25%	37%	Drizzle	WNW 4 mph7 km/h
DayPartly cloudy and warm, with a high of 82°F28°C and morning low of 73°F23°C. Breezy from the W at 6 to 8 mph9 to 12 km/h. 25% chance of drizzle throughout the day. NightPartly cloudy, with a low around 71°F21°C. Light wind from the WNW around 3 mph5 km/h. 14% chance of drizzle before dawn.
	MondaySep 7	84°F29°C	68°F20°C	0 in0.1 mm· 2%	16%	Clear	W 4 mph6 km/h
DayMostly clear and warm, with a high of 84°F29°C and morning low of 72°F22°C. Breezy from the WSW at 5 to 8 mph9 to 13 km/h. NightMostly clear, with a low around 68°F20°C. Light wind from the WNW around 2 mph4 km/h.
	TuesdaySep 8	85°F29°C	66°F19°C	0 in0.1 mm· 3%	18%	Clear	W 4 mph7 km/h
DayMostly clear and warm, with a high of 85°F29°C and morning low of 70°F21°C. Breezy from the W at 6 to 8 mph9 to 13 km/h. NightMostly clear, with a low around 66°F19°C. Light wind from the WNW around 3 mph4 km/h.
	WednesdaySep 9	84°F29°C	68°F20°C	0.02 in0.4 mm· 6%	23%	Clear	WSW 4 mph7 km/h
DayMostly clear and warm, with a high of 84°F29°C and morning low of 72°F22°C. Breezy from the WSW at 6 to 8 mph9 to 13 km/h. NightMostly clear, with a low around 68°F20°C. Light wind from the WSW around 3 mph4 km/h.
	ThursdaySep 10	83°F28°C	68°F20°C	0.02 in0.4 mm· 4%	25%	Clear	WSW 4 mph7 km/h
DayMostly clear and warm, with a high of 83°F28°C and morning low of 71°F22°C. Breezy from the WSW at 5 to 8 mph9 to 13 km/h. NightPartly cloudy, with a low around 68°F20°C. Light wind from the WSW around 3 mph4 km/h.
	FridaySep 11	83°F28°C	68°F20°C	0.04 in1 mm· 7%	36%	Clear	WSW 4 mph7 km/h
DayPartly cloudy and warm, with a high of 83°F28°C and morning low of 71°F22°C. Breezy from the WSW at 5 to 8 mph9 to 13 km/h. NightPartly cloudy, with a low around 68°F20°C. Light wind from the WSW around 3 mph4 km/h.
	SaturdaySep 12	81°F27°C	69°F20°C	0.16 in4.1 mm· 14%	47%	Showers	WSW 5 mph7 km/h
DayPartly cloudy and warm, with a high of 81°F27°C and morning low of 71°F22°C. Breezy from the WSW at 6 to 8 mph10 to 13 km/h. 14% chance of showers throughout the day. NightPartly cloudy, with a low around 69°F20°C. Light wind from the WSW around 3 mph5 km/h. 11% chance of drizzle throughout the night.
	SundaySep 13	81°F27°C	68°F20°C	0.06 in1.6 mm· 12%	47%	Drizzle	WSW 4 mph7 km/h
DayPartly cloudy and warm, with a high of 81°F27°C and morning low of 71°F22°C. Breezy from the WSW at 6 to 8 mph9 to 13 km/h. 12% chance of drizzle throughout the day. NightPartly cloudy, with a low around 68°F20°C. Light wind from the WSW around 3 mph5 km/h. 11% chance of drizzle throughout the night.
	MondaySep 14	81°F27°C	68°F20°C	0.07 in1.8 mm· 9%	40%	Partly Cloudy	WSW 4 mph7 km/h
DayPartly cloudy and warm, with a high of 81°F27°C and morning low of 71°F21°C. Breezy from the WSW at 6 to 8 mph10 to 13 km/h. NightPartly cloudy, with a low around 68°F20°C. Light wind from the WSW around 3 mph5 km/h.
	TuesdaySep 15	81°F27°C	68°F20°C	0.04 in1 mm· 8%	34%	Clear	W 4 mph7 km/h
DayPartly cloudy and warm, with a high of 81°F27°C and morning low of 71°F22°C. Breezy from the WSW at 6 to 8 mph9 to 13 km/h. NightPartly cloudy, with a low around 68°F20°C. Light wind from the W around 3 mph5 km/h.
	WednesdaySep 16	82°F28°C	68°F20°C	0.01 in0.2 mm· 4%	32%	Clear	W 4 mph7 km/h
DayPartly cloudy and warm, with a high of 82°F28°C and morning low of 71°F22°C. Breezy from the W at 6 to 8 mph9 to 13 km/h. NightPartly cloudy, with a low around 68°F20°C. Light wind from the W around 3 mph4 km/h.

Nearby Cities

Escondido5 mi8 km Vista6 mi10 km Encinitas10 mi17 km Carlsbad11 mi17 km Oceanside13 mi21 km Rancho Penasquitos13 mi21 km

About This Forecast

This forecast is powered by WeatherMesh, the world's most advanced and accurate weather model powered by AI. WeatherMesh is built on proprietary data from WindBorne's Global Sounding Balloon constellation — the world's largest fleet of autonomous, long-duration weather balloons — collecting observations across 100% of Earth, including over oceans and remote regions where no other data exists.

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Coordinates: 33.1434°N, 117.1661°W·Elevation: 177m·Timezone: America/Los_Angeles·Population: 92,931