Current Conditions

San Marcos, California

68°F20°C

Cloudy

Wind

SW 3 mph4 km/h

Humidity

86%

Cloud Cover

95%

As of Thursday, August 13, 2026 at 12:31 AM PDT

Today's Outlook

Day

Overcast and warm, with a high of 78°F26°C and morning low of 70°F21°C. Breezy from the SW at 6 to 8 mph10 to 13 km/h.

Night

Overcast, with a low around 68°F20°C. Light wind from the WSW around 3 mph5 km/h.

7-Day Forecast

Condition	High (°F)	Low (°F)	Precip (mm)	Cloud Cover (%)	Wind (mph)
Cloudy	High 78°F26°C	Low 68°F20°C	Precip 0 in0 mm—	Cloud 95%	Wind SW 5 mph7 km/h	Thursday: Overcast and warm, with a high of 78°F26°C and morning low of 70°F21°C. Breezy from the SW at 6 to 8 mph10 to 13 km/h. Thursday Night: Overcast, with a low around 68°F20°C. Light wind from the WSW around 3 mph5 km/h.
Clear	High 81°F27°C	Low 67°F20°C	Precip 0 in0.1 mm2%	Cloud 36%	Wind WSW 5 mph8 km/h	Friday: Partly cloudy and warm, with a high of 81°F27°C and morning low of 70°F21°C. Breezy from the WSW at 6 to 9 mph10 to 14 km/h. Friday Night: Partly cloudy, with a low around 67°F20°C. Light wind from the W around 3 mph5 km/h.
Clear	High 81°F27°C	Low 66°F19°C	Precip 0 in0 mm—	Cloud 26%	Wind W 5 mph8 km/h	Saturday: Mostly clear and warm, with a high of 81°F27°C and morning low of 70°F21°C. Breezy from the W at 7 to 9 mph11 to 15 km/h. Saturday Night: Partly cloudy, with a low around 66°F19°C. Light wind from the WNW around 4 mph6 km/h.
Clear	High 84°F29°C	Low 67°F19°C	Precip 0 in0 mm—	Cloud 28%	Wind W 5 mph8 km/h	Sunday: Mostly clear and warm, with a high of 84°F29°C and morning low of 71°F22°C. Breezy from the W at 7 to 9 mph11 to 15 km/h. Sunday Night: Partly cloudy, with a low around 67°F19°C. Light wind from the WNW around 4 mph6 km/h.
Clear	High 85°F30°C	Low 68°F20°C	Precip 0 in0 mm—	Cloud 28%	Wind W 5 mph8 km/h	Monday: Mostly clear and warm, with a high of 85°F30°C and morning low of 72°F22°C. Breezy from the W at 7 to 9 mph10 to 15 km/h. Monday Night: Partly cloudy, with a low around 68°F20°C. Light wind from the WNW around 3 mph5 km/h.
Clear	High 86°F30°C	Low 68°F20°C	Precip 0 in0 mm—	Cloud 25%	Wind W 4 mph7 km/h	Tuesday: Mostly clear and warm, with a high of 86°F30°C and morning low of 72°F22°C. Breezy from the W at 6 to 9 mph10 to 14 km/h. Tuesday Night: Partly cloudy, with a low around 68°F20°C. Light wind from the W around 3 mph5 km/h.
Clear	High 85°F29°C	Low 68°F20°C	Precip 0 in0 mm—	Cloud 24%	Wind WSW 4 mph7 km/h	Wednesday: Mostly clear and warm, with a high of 85°F29°C and morning low of 72°F22°C. Breezy from the WSW at 6 to 8 mph9 to 13 km/h. Wednesday Night: Partly cloudy, with a low around 68°F20°C. Light wind from the WSW around 3 mph4 km/h.

15-Day Forecast

	Day	High	Low	Precip	Cloud Cover	Condition	Wind
	ThursdayAug 13	78°F26°C	68°F20°C	0 in0 mm· —	95%	Cloudy	SW 5 mph7 km/h
DayOvercast and warm, with a high of 78°F26°C and morning low of 70°F21°C. Breezy from the SW at 6 to 8 mph10 to 13 km/h. NightOvercast, with a low around 68°F20°C. Light wind from the WSW around 3 mph5 km/h.
	FridayAug 14	81°F27°C	67°F20°C	0 in0.1 mm· 2%	36%	Clear	WSW 5 mph8 km/h
DayPartly cloudy and warm, with a high of 81°F27°C and morning low of 70°F21°C. Breezy from the WSW at 6 to 9 mph10 to 14 km/h. NightPartly cloudy, with a low around 67°F20°C. Light wind from the W around 3 mph5 km/h.
	SaturdayAug 15	81°F27°C	66°F19°C	0 in0 mm· —	26%	Clear	W 5 mph8 km/h
DayMostly clear and warm, with a high of 81°F27°C and morning low of 70°F21°C. Breezy from the W at 7 to 9 mph11 to 15 km/h. NightPartly cloudy, with a low around 66°F19°C. Light wind from the WNW around 4 mph6 km/h.
	SundayAug 16	84°F29°C	67°F19°C	0 in0 mm· —	28%	Clear	W 5 mph8 km/h
DayMostly clear and warm, with a high of 84°F29°C and morning low of 71°F22°C. Breezy from the W at 7 to 9 mph11 to 15 km/h. NightPartly cloudy, with a low around 67°F19°C. Light wind from the WNW around 4 mph6 km/h.
	MondayAug 17	85°F30°C	68°F20°C	0 in0 mm· —	28%	Clear	W 5 mph8 km/h
DayMostly clear and warm, with a high of 85°F30°C and morning low of 72°F22°C. Breezy from the W at 7 to 9 mph10 to 15 km/h. NightPartly cloudy, with a low around 68°F20°C. Light wind from the WNW around 3 mph5 km/h.
	TuesdayAug 18	86°F30°C	68°F20°C	0 in0 mm· —	25%	Clear	W 4 mph7 km/h
DayMostly clear and warm, with a high of 86°F30°C and morning low of 72°F22°C. Breezy from the W at 6 to 9 mph10 to 14 km/h. NightPartly cloudy, with a low around 68°F20°C. Light wind from the W around 3 mph5 km/h.
	WednesdayAug 19	85°F29°C	68°F20°C	0 in0 mm· —	24%	Clear	WSW 4 mph7 km/h
DayMostly clear and warm, with a high of 85°F29°C and morning low of 72°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 WSW around 3 mph4 km/h.
	ThursdayAug 20	85°F29°C	68°F20°C	0 in0 mm· —	25%	Clear	WSW 4 mph7 km/h
DayPartly cloudy and warm, with a high of 85°F29°C and morning low of 72°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 WSW around 3 mph4 km/h.
	FridayAug 21	85°F30°C	68°F20°C	0 in0 mm· —	22%	Clear	W 4 mph7 km/h
DayMostly clear and warm, with a high of 85°F30°C and morning low of 72°F22°C. Breezy from the W at 6 to 8 mph9 to 14 km/h. NightMostly clear, with a low around 68°F20°C. Light wind from the W around 3 mph4 km/h.
	SaturdayAug 22	86°F30°C	69°F21°C	0 in0 mm· —	18%	Clear	W 4 mph7 km/h
DayMostly clear and warm, with a high of 86°F30°C and morning low of 73°F23°C. Breezy from the W at 6 to 9 mph10 to 14 km/h. NightMostly clear, with a low around 69°F21°C. Light wind from the W around 3 mph4 km/h.
	SundayAug 23	85°F30°C	69°F20°C	0 in0.1 mm· 2%	21%	Clear	W 4 mph7 km/h
DayMostly clear and warm, with a high of 85°F30°C and morning low of 73°F23°C. Breezy from the W at 6 to 8 mph9 to 14 km/h. NightMostly clear, with a low around 69°F20°C. Light wind from the W around 3 mph4 km/h.
	MondayAug 24	86°F30°C	69°F20°C	0 in0.1 mm· 2%	20%	Clear	W 4 mph7 km/h
DayMostly clear and warm, with a high of 86°F30°C and morning low of 74°F23°C. Breezy from the W at 6 to 8 mph9 to 13 km/h. NightMostly clear, with a low around 69°F20°C. Light wind from the W around 3 mph4 km/h.
	TuesdayAug 25	86°F30°C	69°F20°C	0.01 in0.3 mm· 6%	22%	Clear	W 4 mph7 km/h
DayMostly clear and warm, with a high of 86°F30°C and morning low of 73°F23°C. Breezy from the W at 6 to 8 mph9 to 13 km/h. NightMostly clear, with a low around 69°F20°C. Light wind from the W around 3 mph4 km/h.
	WednesdayAug 26	86°F30°C	69°F21°C	0 in0.1 mm· 4%	33%	Clear	W 4 mph7 km/h
DayPartly cloudy and hot, with a high of 86°F30°C and morning low of 74°F23°C. Breezy from the W at 6 to 8 mph9 to 13 km/h. NightPartly cloudy, with a low around 69°F21°C. Light wind from the WNW around 3 mph4 km/h.
	ThursdayAug 27	85°F30°C	70°F21°C	0.02 in0.6 mm· 6%	45%	Partly Cloudy	W 4 mph7 km/h
DayPartly cloudy and warm, with a high of 85°F30°C and morning low of 73°F23°C. Breezy from the W at 6 to 8 mph9 to 13 km/h. NightPartly cloudy, with a low around 70°F21°C. Light wind from the W 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