Weather WorldIsland Brook Lagoon, CT Weather Forecast
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Island Brook Lagoon Weather Forecast
| TONIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY |
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| Showers | Chance of Showers | Chance of Showers | Showers Likely | Chance of T-Storm | Chance of T-Storm | Chance of T-Storm | Sunny | Mostly Clear | Sunny | Partly Cloudy | Mostly Sunny |
| Lo: 65°FLo: 18°C | Hi: 79°FHi: 26°C | Lo: 61°FLo: 16°C | Hi: 75°FHi: 24°C | Lo: 61°FLo: 16°C | Hi: 81°FHi: 27°C | Lo: 61°FLo: 16°C | Hi: 79°FHi: 26°C | Lo: 59°FLo: 15°C | Hi: 79°FHi: 26°C | Lo: 60°FLo: 16°C | Hi: 80°FHi: 27°C |
| POP: 100% | POP: 40% | POP: 20% | POP: 60% | POP: 60% | POP: 50% | POP: 50% |
POP = Probability of Precipitation.
Weather Outlook Updated: 939 PM EDT Thu Aug 20 2026 
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Island Brook Lagoon Forecast Discussion
Issued: 200 AM EDT Fri Aug 21 2026
Key Messages
1) Unsettled conditions may continue across the eastern half of the area on Friday.
2) Additional showers are expected Saturday into Sunday, but impacts appear limited at this time.
3) Dry and seasonably warm early next week.
Discussion
... .KEY MESSAGE 1... Guidance is struggling with the handling of a weak surface low on Friday. There are two solutions with one being progressive/weaker, which would lead to mostly dry conditions on Friday areawide. The othe...