Rio del Mar, CA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Rio del Mar, a community in Santa Cruz County, California.
This Afternoon
62°F
Light Rain Likely
Rain likely. Partly sunny. High near 62, with temperatures falling to around 60 in the afternoon. South southwest wind 7 to 21 mph, with gusts as high as 29 mph. Chance of precipitation is 60%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Rio del Mar
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 62°F | Light Rain Likely | 7 to 21 mph SSW | 61% |
| Tonight | 54°F | Chance Light Rain | 3 to 7 mph SSE | 38% |
| Wednesday | 65°F | Sunny | 2 to 15 mph NNW | 1% |
| Wednesday Night | 53°F | Mostly Cloudy | 5 to 16 mph N | 0% |
| Thursday | 66°F | Mostly Sunny | 5 mph N | 0% |
| Thursday Night | 53°F | Mostly Clear | 5 to 12 mph N | 0% |
| Friday | 67°F | Sunny | 1 to 5 mph N | 0% |
| Friday Night | 55°F | Mostly Clear | 3 to 9 mph NNE | 0% |
| Saturday | 69°F | Sunny | 2 to 6 mph NNW | 0% |
| Saturday Night | 56°F | Mostly Clear | 2 to 9 mph N | 0% |
| Sunday | 69°F | Mostly Sunny | 1 to 7 mph NNW | 0% |
| Sunday Night | 56°F | Partly Cloudy | 3 to 12 mph N | 0% |
| Monday | 67°F | Partly Sunny | 1 to 7 mph NNW | 1% |
| Monday Night | 55°F | Mostly Cloudy | 6 to 14 mph N | 2% |
Forecast source: National Weather Service (api.weather.gov) for Rio del Mar (36.958, -121.885). Updated through the day.
Growing snapshot for Rio del Mar
Last spring frost
Jan 29
First fall frost
Dec 13
Growing season
323 days
Hardiness zone
9b
More local growing data for Rio del Mar: nearby ZIP 95003 weather · frost dates · planting calendar · California frost dates
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Climate data from the nearest NOAA station, Santa Cruz, Ca (6.8 mi from Rio del Mar). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 3, 2026.