Half Moon Bay, CA Weather & Growing Conditions
Tonight
47°F
Mostly Cloudy
Mostly cloudy. Low around 47, with temperatures rising to around 49 overnight. East wind 2 to 6 mph. New rainfall amounts less than a tenth of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 47°F | Mostly Cloudy | 2 to 6 mph E | 10% |
| Wednesday | 64°F | Mostly Sunny | 5 to 10 mph NNE | 2% |
| Wednesday Night | 48°F | Mostly Cloudy | 2 to 10 mph NNW | 2% |
| Thursday | 68°F | Mostly Sunny | 2 to 6 mph N | 0% |
| Thursday Night | 47°F | Mostly Clear | 1 to 5 mph N | 0% |
| Friday | 70°F | Mostly Sunny | 1 to 6 mph N | 0% |
| Friday Night | 47°F | Partly Cloudy | 1 to 6 mph N | 0% |
| Saturday | 72°F | Sunny | 1 to 5 mph N | 0% |
| Saturday Night | 49°F | Partly Cloudy | 5 mph NNW | 0% |
| Sunday | 71°F | Mostly Sunny | 2 to 6 mph NNW | 0% |
| Sunday Night | 50°F | Mostly Cloudy | 1 to 6 mph NNW | 0% |
| Monday | 69°F | Partly Sunny | 1 to 7 mph NNW | 3% |
| Monday Night | 49°F | Mostly Cloudy | 1 to 7 mph NNW | 3% |
| Tuesday | 69°F | Mostly Sunny | 1 to 5 mph NNW | 6% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Half Moon Bay, CA
Last spring frost
Feb 6
First fall frost
Dec 17
Growing season
328 days
Hardiness zone
10a
Explore more for Half Moon Bay, CA: full frost dates · planting calendar · California frost dates
Climate data from the nearest NOAA station, Half Moon Bay, Ca (2.3 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.