Weather WorldFoster Lake, CA Weather Forecast
Quick Weather Clicks
Settings
Sun & Moon
Foster Lake Weather Forecast
| TODAY | TONIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | TUESDAY | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY |
 |  | | | |  | | | | |  |
| Sunny | Clear | Sunny | Mostly Clear | Mostly Sunny | Partly Cloudy | Mostly Clear | Mostly Clear | Mostly Clear | Partly Cloudy | Partly Cloudy |
| Hi: 81°FHi: 27°C | Lo: 51°FLo: 11°C | Hi: 84°FHi: 29°C | Lo: 54°FLo: 12°C | Hi: 86°FHi: 30°C | Lo: 55°FLo: 13°C | Hi: 88°FHi: 31°C Lo: 55°FLo: 13°C | Hi: 88°FHi: 31°C Lo: 55°FLo: 13°C | Hi: 88°FHi: 31°C Lo: 55°FLo: 13°C | Hi: 85°FHi: 29°C Lo: 55°FLo: 13°C | Hi: 85°FHi: 29°C Lo: 55°FLo: 13°C |
POP = Probability of Precipitation.
Weather Outlook Updated: 136 AM PDT Fri Sep 18 2026 
Foster Lake Radar Loop
Use the map search tool if you want to place a location marker on the radar map...
Foster Lake Weather Map
Foster Lake Quick Facts
Foster Lake Forecast Discussion
Meteorlogic Glosserator
Instant definitions for any meteorological term.
Instant definitions for any meteorological term.
Issued: 1213 AM PDT Fri Sep 18 2026
Key Messages
- Warmer and drier interior temperatures into the weekend with highs in the 90s by Sunday.
- A shallow but strong marine layer forming close to shore with persistent marine clouds.
Discussion
...A high pressure ridge will gradually rebuild Friday and into the weekend. This pattern will allow for interior temperatures to dry back out and warm back into the 90s. Moderate north winds will return near shore, helping form a shallow but persistent marine layer especially north of Cape Mendocino....