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Wriv-Am Riverhead Weather Forecast
| TODAY | TONIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT |
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| Thunderstorms | Chance of T-Storm | Sunny | Mostly Clear | Sunny | Partly Cloudy | Partly Sunny | Chance of T-Storm | Chance of T-Storm | Partly Cloudy | Mostly Sunny | Partly Cloudy |
| Hi: 80°FHi: 27°C | Lo: 65°FLo: 18°C | Hi: 79°FHi: 26°C | Lo: 65°FLo: 18°C | Hi: 79°FHi: 26°C | Lo: 69°FLo: 21°C | Hi: 80°FHi: 27°C | Lo: 69°FLo: 21°C | Hi: 79°FHi: 26°C | Lo: 69°FLo: 21°C | Hi: 79°FHi: 26°C | Lo: 65°FLo: 18°C |
| POP: 20% | POP: 20% | POP: 60% | POP: 60% |
POP = Probability of Precipitation.
Weather Outlook Updated: 1006 AM EDT Mon Aug 24 2026 
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Issued: 1026 AM EDT Mon Aug 24 2026
Key Messages
1) Isolated afternoon into evening shower and thunderstorm activity today and Tuesday.
2) An approaching frontal system will bring a more widespread potential for showers and thunderstorms Thursday into Friday.
Discussion
... .KEY MESSAGE 1...
A slow moving closed upper level low will open and move across to the north of the region today into tonight. At the surface, a weak cold front will move across. Multiple embedded shortwaves are shown to move across the periphery of this closed upp...