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Martinez Reservoir Weather Forecast
| TONIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY |
 |  |  |  |  | | | | |  |  |  |
| Partly Cloudy | Partly Cloudy | Mostly Cloudy | Chance of Rain | Chance of Rain | Chance of Rain | Chance of Rain | Chance of Rain | Partly Cloudy | Sunny | Clear | Patchy Fog |
| Lo: 51°FLo: 11°C | Hi: 70°FHi: 21°C | Lo: 46°FLo: 8°C | Hi: 70°FHi: 21°C | Lo: 51°FLo: 11°C | Hi: 69°FHi: 21°C | Lo: 51°FLo: 11°C | Hi: 70°FHi: 21°C | Lo: 50°FLo: 10°C | Hi: 71°FHi: 22°C | Lo: 49°FLo: 9°C | Hi: 71°FHi: 22°C |
| POP: 40% | POP: 50% |
POP = Probability of Precipitation.
Weather Outlook Updated: 602 PM PDT Sun Oct 18 2026 
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Issued: 754 PM PDT Sun Oct 18 2026
Key Messages
Updated at 753 PM PDT Sun Oct 18 2026- Cooling trend continues through the end of the week
- Beneficial light rain showers expected mid-week
- Thunderstorms possible mid-week across southern Central Coast
Aviation
... (00Z TAFS) Issued at 415 PM PDT Sun Oct 18 2026
Patchy MVFR-IFR stratus persists at the immediate coast with the rest of the region remaining VFR into the evening hours. MVFR ceilings are expected to develop across the interior overnight with some patchy ceilings within the cen...