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Groton Weather Forecast
| TONIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT |
 |  |  |  | |  | |  |  | |  | |
| Showers | Patchy Fog | Mostly Cloudy | Partly Sunny | Mostly Cloudy | Partly Cloudy | Partly Cloudy | Chance of Showers | Mostly Sunny | Mostly Cloudy | Chance of Showers | Chance of Showers |
| Lo: 50°FLo: 10°C | Hi: 69°FHi: 21°C | Lo: 51°FLo: 11°C | Hi: 71°FHi: 22°C | Lo: 55°FLo: 13°C | Hi: 79°FHi: 26°C Lo: 65°FLo: 18°C | Hi: 79°FHi: 26°C Lo: 65°FLo: 18°C | Lo: 51°FLo: 11°C | Hi: 69°FHi: 21°C | Lo: 49°FLo: 9°C | Hi: 65°FHi: 18°C Lo: 49°FLo: 9°C | Hi: 65°FHi: 18°C Lo: 49°FLo: 9°C |
| POP: 100% | POP: 30% | POP: 50% | POP: 50% |
POP = Probability of Precipitation.
Weather Outlook Updated: 704 PM EDT Mon Sep 28 2026 
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Meteorlogic Glosserator
Instant definitions for any meteorological term.
Instant definitions for any meteorological term.
Issued: 721 PM EDT Mon Sep 28 2026
Key Messages
- Slowly improving weather overnight and Tuesday as the nor`easter weakens and moves away
- Warm and Dry conditions arrive Wednesday through Friday followed by a chance for rainy and unsettled conditions this weekend
Discussion
... KEY MESSAGE 1...Slowly improving weather overnight and Tuesday as the nor`easter weakens and moves away.
Although the low level swirl around the center of the nor`easter south of Long Island looks impressive on satellite imagery, the storm is quickly weakening as...