Weather World
Town of Riverhead, New YorkRiverhead, NY Weather Forecast
Quick Weather Clicks
Settings
Sun & Moon
Riverhead Weather Forecast
| TONIGHT | SUNDAY | SUNDAY NIGHT | LABOR DAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY |
 |  |  |  | | |  | | | |  | |
| Chance of Showers | Chance of Showers | Mostly Clear | Sunny | Mostly Clear | Sunny | Mostly Cloudy | Mostly Sunny | Mostly Cloudy | Chance of Showers | Partly Cloudy | Mostly Sunny |
| Lo: 61°FLo: 16°C | Hi: 70°FHi: 21°C | Lo: 55°FLo: 13°C | Hi: 75°FHi: 24°C | Lo: 61°FLo: 16°C | Hi: 75°FHi: 24°C | Lo: 65°FLo: 18°C | Hi: 75°FHi: 24°C | Lo: 70°FLo: 21°C | Hi: 80°FHi: 27°C | Lo: 61°FLo: 16°C | Hi: 71°FHi: 22°C |
| POP: 50% | POP: 20% | POP: 30% |
POP = Probability of Precipitation.
Weather Outlook Updated: 407 PM EDT Sat Sep 05 2026 
Riverhead Radar Loop
Use the map search tool if you want to place a location marker on the radar map...
Riverhead Weather Map
Riverhead Quick Facts
Riverhead Forecast Discussion
Meteorlogic Glosserator
Instant definitions for any meteorological term.
Instant definitions for any meteorological term.
Issued: 135 PM EDT Sat Sep 5 2026
Key Messages
1) Conditions turn cooler and more comfortable for the holiday weekend. A few showers remain possible this afternoon and evening, mainly across southern Connecticut and Long Island.
2) After a tranquil stretch of weather early next week, unsettled conditions return Wednesday.
Discussion
... .KEY MESSAGE 1... Closed low trough centered over the Canadian Maritimes digs into the Northeast to start the holiday weekend. Meanwhile, surface high pressure slowly builds south from Canada, usheri...