Half Moon Bay, CA Weather & Growing Conditions
Tonight
54°F
Mostly Cloudy then Patchy Fog
Patchy fog after 5am. Mostly cloudy. Low around 54, with temperatures rising to around 56 overnight. West wind 2 to 6 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 54°F | Mostly Cloudy then Patchy Fog | 2 to 6 mph W | 1% |
| Saturday | 68°F | Patchy Fog then Partly Sunny | 1 to 8 mph W | 0% |
| Saturday Night | 54°F | Cloudy | 3 to 7 mph W | 1% |
| Sunday | 64°F | Cloudy | 3 to 7 mph WNW | 5% |
| Sunday Night | 54°F | Cloudy | 2 to 7 mph WNW | 5% |
| Monday | 65°F | Mostly Cloudy | 2 to 7 mph W | 2% |
| Monday Night | 54°F | Mostly Cloudy then Patchy Fog | 2 to 6 mph WSW | 2% |
| Tuesday | 68°F | Patchy Fog then Partly Sunny | 2 to 7 mph WSW | 2% |
| Tuesday Night | 54°F | Mostly Cloudy | 0 to 6 mph WSW | 0% |
| Wednesday | 76°F | Patchy Fog then Mostly Sunny | 0 to 6 mph SW | 0% |
| Wednesday Night | 56°F | Mostly Cloudy | 0 to 6 mph NW | 0% |
| Thursday | 77°F | Mostly Sunny | 0 to 6 mph WNW | 0% |
| Thursday Night | 56°F | Mostly Cloudy | 1 to 6 mph W | 0% |
| Friday | 72°F | Partly Sunny | 2 to 7 mph WNW | 0% |
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 Sep 19, 2026.