Current Conditions

San Marcos, California

69°F20°C

Clear

Wind

NNW 2 mph3 km/h

Humidity

75%

Cloud Cover

29%

As of Wednesday, September 23, 2026 at 7:11 AM PDT

Today's Outlook

Day

Mostly clear and warm, with a high of 83°F28°C and morning low of 69°F20°C. Breezy from the WSW at 6 to 9 mph9 to 14 km/h.

Night

Mostly clear, with a low around 64°F18°C. Light wind from the WNW around 2 mph3 km/h.

7-Day Forecast

Condition	High (°F)	Low (°F)	Precip (mm)	Cloud Cover (%)	Wind (mph)
Clear	High 83°F28°C	Low 64°F18°C	Precip 0 in0 mm—	Cloud 15%	Wind W 4 mph7 km/h	Wednesday: Mostly clear and warm, with a high of 83°F28°C and morning low of 69°F20°C. Breezy from the WSW at 6 to 9 mph9 to 14 km/h. Wednesday Night: Mostly clear, with a low around 64°F18°C. Light wind from the WNW around 2 mph3 km/h.
Clear	High 82°F28°C	Low 67°F19°C	Precip 0 in0.1 mm4%	Cloud 22%	Wind W 4 mph6 km/h	Thursday: Partly cloudy and warm, with a high of 82°F28°C and morning low of 70°F21°C. Breezy from the W at 5 to 8 mph9 to 13 km/h. Thursday Night: Mostly clear, with a low around 67°F19°C. Light wind from the WNW around 2 mph4 km/h.
Clear	High 84°F29°C	Low 68°F20°C	Precip 0 in0.1 mm1%	Cloud 29%	Wind W 4 mph6 km/h	Friday: Partly cloudy and warm, with a high of 84°F29°C and morning low of 71°F21°C. Breezy from the W at 6 to 9 mph9 to 14 km/h. Friday Night: Partly cloudy, with a low around 68°F20°C. Light wind from the WNW around 2 mph4 km/h.
Partly Cloudy	High 87°F30°C	Low 68°F20°C	Precip 0 in0 mm—	Cloud 73%	Wind W 4 mph6 km/h	Saturday: Mostly cloudy and hot, with a high of 87°F30°C and morning low of 71°F22°C. Breezy from the W at 5 to 8 mph8 to 13 km/h. Saturday Night: Mostly cloudy, with a low around 68°F20°C. Light wind from the W around 2 mph4 km/h.
Light Rain	High 77°F25°C	Low 70°F21°C	Precip 0.15 in3.8 mm41%	Cloud 76%	Wind W 4 mph6 km/h	Sunday: Mostly cloudy and warm, with a high of 77°F25°C and morning low of 71°F22°C. Light wind from the WSW around 5 mph8 km/h. 41% chance of light rain throughout the day. Sunday Night: Mostly cloudy, with a low around 70°F21°C. Light wind from the WNW around 3 mph4 km/h. 28% chance of drizzle throughout the night.
Drizzle	High 79°F26°C	Low 68°F20°C	Precip 0.09 in2.4 mm22%	Cloud 41%	Wind WNW 4 mph7 km/h	Monday: Partly cloudy and warm, with a high of 79°F26°C and morning low of 69°F21°C. Breezy from the W at 6 to 8 mph9 to 12 km/h. 22% chance of drizzle throughout the day. Monday Night: Partly cloudy, with a low around 68°F20°C. Light wind from the NW around 3 mph5 km/h. 18% chance of drizzle throughout the night.
Drizzle	High 84°F29°C	Low 65°F18°C	Precip 0.07 in1.7 mm14%	Cloud 22%	Wind NW 4 mph7 km/h	Tuesday: Mostly clear and warm, with a high of 84°F29°C and morning low of 68°F20°C. Breezy from the WNW at 5 to 7 mph9 to 11 km/h. 14% chance of drizzle throughout the day. Tuesday Night: Mostly clear, with a low around 65°F18°C. Light wind from the NNE around 3 mph5 km/h. 12% chance of drizzle throughout the night.

15-Day Forecast

	Day	High	Low	Precip	Cloud Cover	Condition	Wind
	WednesdaySep 23	83°F28°C	64°F18°C	0 in0 mm· —	15%	Clear	W 4 mph7 km/h
DayMostly clear and warm, with a high of 83°F28°C and morning low of 69°F20°C. Breezy from the WSW at 6 to 9 mph9 to 14 km/h. NightMostly clear, with a low around 64°F18°C. Light wind from the WNW around 2 mph3 km/h.
	ThursdaySep 24	82°F28°C	67°F19°C	0 in0.1 mm· 4%	22%	Clear	W 4 mph6 km/h
DayPartly cloudy and warm, with a high of 82°F28°C and morning low of 70°F21°C. Breezy from the W at 5 to 8 mph9 to 13 km/h. NightMostly clear, with a low around 67°F19°C. Light wind from the WNW around 2 mph4 km/h.
	FridaySep 25	84°F29°C	68°F20°C	0 in0.1 mm· 1%	29%	Clear	W 4 mph6 km/h
DayPartly cloudy and warm, with a high of 84°F29°C and morning low of 71°F21°C. Breezy from the W at 6 to 9 mph9 to 14 km/h. NightPartly cloudy, with a low around 68°F20°C. Light wind from the WNW around 2 mph4 km/h.
	SaturdaySep 26	87°F30°C	68°F20°C	0 in0 mm· —	73%	Partly Cloudy	W 4 mph6 km/h
DayMostly cloudy and hot, with a high of 87°F30°C and morning low of 71°F22°C. Breezy from the W at 5 to 8 mph8 to 13 km/h. NightMostly cloudy, with a low around 68°F20°C. Light wind from the W around 2 mph4 km/h.
	SundaySep 27	77°F25°C	70°F21°C	0.15 in3.8 mm· 41%	76%	Light Rain	W 4 mph6 km/h
DayMostly cloudy and warm, with a high of 77°F25°C and morning low of 71°F22°C. Light wind from the WSW around 5 mph8 km/h. 41% chance of light rain throughout the day. NightMostly cloudy, with a low around 70°F21°C. Light wind from the WNW around 3 mph4 km/h. 28% chance of drizzle throughout the night.
	MondaySep 28	79°F26°C	68°F20°C	0.09 in2.4 mm· 22%	41%	Drizzle	WNW 4 mph7 km/h
DayPartly cloudy and warm, with a high of 79°F26°C and morning low of 69°F21°C. Breezy from the W at 6 to 8 mph9 to 12 km/h. 22% chance of drizzle throughout the day. NightPartly cloudy, with a low around 68°F20°C. Light wind from the NW around 3 mph5 km/h. 18% chance of drizzle throughout the night.
	TuesdaySep 29	84°F29°C	65°F18°C	0.07 in1.7 mm· 14%	22%	Drizzle	NW 4 mph7 km/h
DayMostly clear and warm, with a high of 84°F29°C and morning low of 68°F20°C. Breezy from the WNW at 5 to 7 mph9 to 11 km/h. 14% chance of drizzle throughout the day. NightMostly clear, with a low around 65°F18°C. Light wind from the NNE around 3 mph5 km/h. 12% chance of drizzle throughout the night.
	WednesdaySep 30	86°F30°C	67°F19°C	0.06 in1.6 mm· 10%	29%	Drizzle	W 4 mph7 km/h
DayPartly cloudy and warm, with a high of 86°F30°C and morning low of 70°F21°C. Breezy from the W at 6 to 7 mph9 to 12 km/h. 10% chance of drizzle throughout the day. NightPartly cloudy, with a low around 67°F19°C. Light wind from the NE around 3 mph5 km/h. 10% chance of drizzle throughout the night.
	ThursdayOct 1	85°F29°C	67°F19°C	0.03 in0.8 mm· 10%	37%	Drizzle	W 4 mph7 km/h
DayPartly cloudy and warm, with a high of 85°F29°C and morning low of 70°F21°C. Breezy from the W at 5 to 8 mph9 to 12 km/h. 10% chance of drizzle in the afternoon. NightPartly cloudy, with a low around 67°F19°C. Light wind from the NNE around 3 mph5 km/h.
	FridayOct 2	84°F29°C	67°F20°C	0.02 in0.4 mm· 6%	27%	Clear	W 4 mph6 km/h
DayPartly cloudy and warm, with a high of 84°F29°C and morning low of 70°F21°C. Breezy from the W at 5 to 7 mph8 to 12 km/h. NightPartly cloudy, with a low around 67°F20°C. Light wind from the N around 3 mph4 km/h.
	SaturdayOct 3	85°F30°C	67°F20°C	0.02 in0.6 mm· 4%	26%	Clear	W 4 mph6 km/h
DayMostly clear and warm, with a high of 85°F30°C and morning low of 70°F21°C. Breezy from the W at 5 to 7 mph8 to 11 km/h. NightPartly cloudy, with a low around 67°F20°C. Light wind from the N around 3 mph4 km/h.
	SundayOct 4	86°F30°C	68°F20°C	0.02 in0.6 mm· 4%	26%	Clear	W 4 mph6 km/h
DayPartly cloudy and warm, with a high of 86°F30°C and morning low of 71°F22°C. Breezy from the W at 5 to 7 mph8 to 12 km/h. NightPartly cloudy, with a low around 68°F20°C. Light wind from the NNE around 3 mph4 km/h.
	MondayOct 5	85°F29°C	68°F20°C	0.03 in0.8 mm· 6%	29%	Clear	W 4 mph7 km/h
DayPartly cloudy and warm, with a high of 85°F29°C and morning low of 70°F21°C. Breezy from the WSW at 6 to 7 mph9 to 12 km/h. NightPartly cloudy, with a low around 68°F20°C. Light wind from the NNE around 3 mph5 km/h.
	TuesdayOct 6	84°F29°C	68°F20°C	0.04 in1.1 mm· 10%	28%	Drizzle	WSW 4 mph7 km/h
DayPartly cloudy and warm, with a high of 84°F29°C and morning low of 71°F22°C. Breezy from the WSW at 5 to 7 mph9 to 12 km/h. 10% chance of drizzle throughout the day. NightPartly cloudy, with a low around 68°F20°C. Light wind from the NE around 3 mph5 km/h.
	WednesdayOct 7	84°F29°C	67°F20°C	0.03 in0.8 mm· 7%	25%	Clear	W 4 mph7 km/h
DayMostly clear and warm, with a high of 84°F29°C and morning low of 70°F21°C. Breezy from the W at 5 to 7 mph9 to 12 km/h. NightPartly cloudy, with a low around 67°F20°C. Light wind from the NNW around 3 mph5 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