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.
Today
65°F
Patchy Fog then Mostly Sunny
Patchy fog and a slight chance of drizzle before 10am. Mostly sunny, with a high near 65. South southwest wind 2 to 8 mph. Chance of precipitation is 20%.
7-day forecast for Rio del Mar
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 65°F | Patchy Fog then Mostly Sunny | 2 to 8 mph SSW | 15% |
| Tonight | 55°F | Patchy Fog then Mostly Cloudy | 1 to 5 mph SW | 0% |
| Wednesday | 64°F | Mostly Sunny | 1 to 7 mph SW | 0% |
| Wednesday Night | 56°F | Patchy Fog then Partly Cloudy | 0 to 6 mph W | 0% |
| Thursday | 66°F | Mostly Sunny | 0 to 7 mph NW | 0% |
| Thursday Night | 58°F | Partly Cloudy | 1 to 7 mph NW | 0% |
| Friday | 72°F | Mostly Sunny | 1 to 7 mph WNW | 0% |
| Friday Night | 60°F | Mostly Clear | 0 to 7 mph NW | 0% |
| Saturday | 68°F | Mostly Sunny | 0 to 7 mph WNW | 0% |
| Saturday Night | 58°F | Partly Cloudy | 1 to 7 mph WNW | 0% |
| Sunday | 66°F | Patchy Fog then Sunny | 1 to 8 mph WNW | 0% |
| Sunday Night | 56°F | Partly Cloudy then Patchy Fog | 2 to 8 mph WNW | 0% |
| Monday | 61°F | Patchy Fog then Mostly Sunny | 2 to 9 mph WSW | 0% |
| Monday Night | 55°F | Partly Cloudy | 1 to 9 mph WNW | 0% |
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 Aug 4, 2026.