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| TONIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY |
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| Patchy Fog | Patchy Fog | Patchy Fog | Patchy Fog | Patchy Fog | Patchy Fog | Mostly Clear | Partly Cloudy | Mostly Clear | Partly Cloudy | Partly Cloudy | Partly Cloudy |
| Lo: 67°FLo: 19°C | Hi: 86°FHi: 30°C | Lo: 68°FLo: 20°C | Hi: 87°FHi: 31°C | Lo: 68°FLo: 20°C | Hi: 88°FHi: 31°C | Lo: 69°FLo: 21°C | Hi: 88°FHi: 31°C | Lo: 69°FLo: 21°C | Hi: 89°FHi: 32°C | Lo: 70°FLo: 21°C | Hi: 89°FHi: 32°C |
POP = Probability of Precipitation.
Weather Outlook Updated: 1216 PM PDT Thu Aug 20 2026 
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National City Forecast Discussion
Issued: 423 PM PDT Thu Aug 20 2026
Discussion
...FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE... SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO COUNTIES...
...UPDATED AVIATION DISCUSSION...
A weakening Mesoscale Convective Vortex (MCV) from earlier convection over AZ has moved into far Southeast California. Outflow from this system has helped kicked off convection over the San Diego County mountains, while further north we`ve only seen some cumulus clouds so far. Expect scattered ...