Lake San Marcos, CA Weather & Growing Conditions

Local forecast, frost dates, hardiness zone and planting guidance for Lake San Marcos, a community in San Diego County, California.

Today

74°F

Patchy Drizzle then Sunny

Patchy drizzle before 10am. Sunny, with a high near 74. West wind 0 to 5 mph.

7-day forecast for Lake San Marcos

When	Temp	Forecast	Wind	Precip
Today	74°F	Patchy Drizzle then Sunny	0 to 5 mph W	6%
Tonight	56°F	Partly Cloudy	0 to 5 mph NE	0%
Thursday	77°F	Mostly Sunny	0 to 5 mph N	0%
Thursday Night	57°F	Partly Cloudy	0 to 5 mph E	0%
Friday	82°F	Sunny	0 to 5 mph N	0%
Friday Night	59°F	Mostly Clear	5 to 10 mph NE	0%
Saturday	85°F	Sunny	0 to 10 mph N	0%
Saturday Night	61°F	Mostly Clear	5 to 10 mph NE	0%
Sunday	85°F	Sunny	0 to 10 mph N	0%
Sunday Night	64°F	Partly Cloudy	5 to 10 mph NE	0%
Monday	83°F	Mostly Sunny	0 to 5 mph N	0%
Monday Night	62°F	Partly Cloudy	0 to 5 mph NW	1%
Tuesday	80°F	Mostly Sunny	0 to 5 mph SW	2%
Tuesday Night	61°F	Mostly Clear	0 to 5 mph N	5%

Forecast source: National Weather Service (api.weather.gov) for Lake San Marcos (33.122, -117.209). Updated through the day.

Growing snapshot for Lake San Marcos

Last spring frost

Jan 2

First fall frost

Dec 30

Growing season

365 days

Hardiness zone

10a

More local growing data for Lake San Marcos: nearby ZIP 92078 weather · frost dates · planting calendar · California frost dates

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All California locations ›

Climate data from the nearest NOAA station, Escondido #2, Ca (5.3 mi from Lake San Marcos). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.