Weather WorldSwift Reservoir, WA Weather Forecast
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Swift Reservoir Weather Forecast
| TODAY | TONIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT |
 | | | | | |  |  |  |  |  | |
| Patchy Fog | Patchy Fog | Patchy Fog | Patchy Fog | Patchy Fog | Patchy Fog | Mostly Sunny | Partly Cloudy | Partly Sunny | Chance of Rain | Chance of Rain | Chance of Rain |
| Hi: 81°FHi: 27°C | Lo: 55°FLo: 13°C | Hi: 80°FHi: 27°C | Lo: 51°FLo: 11°C | Hi: 79°FHi: 26°C | Lo: 55°FLo: 13°C | Hi: 85°FHi: 29°C | Lo: 59°FLo: 15°C | Hi: 80°FHi: 27°C | Lo: 55°FLo: 13°C | Hi: 75°FHi: 24°C | Lo: 51°FLo: 11°C |
| POP: 20% | POP: 20% | POP: 20% |
POP = Probability of Precipitation.
Weather Outlook Updated: 501 AM PDT Mon Aug 17 2026 
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Swift Reservoir Forecast Discussion
Issued: 450 AM PDT Mon Aug 17 2026
Discussion
...Now through Saturday...Minimal changes to the forecast. Seasonably dry and warm conditions continue through the week with minimal weather impacts. The large-scale pattern remains stagnant through the period, with broad and relatively flat upper-level ridging over the majority of CONUS and a weak, positively-tilted upper-level troughing over the northeast Pacific. This pattern will support continued onshore flow, maintaining near-normal daily high temper...