Greenwich, CT Weather Forecast
Local 7-day forecast
Areas Of Smoke
Track current conditions, temperature changes, wind, and the full daily outlook for Greenwich, CT in one place.
Areas of smoke before 11am, then rain showers likely and areas of smoke between 11am and 2pm, then areas of smoke and showers and thunderstorms. Mostly cloudy. High near 81, with temperatures falling to around 77 in the afternoon. South wind 6 to 14 mph, with gusts as high as 25 mph. Chance of precipitation is 80%. New rainfall amounts between a half and three quarters of an inch possible.
Local Weather Overview
This forecast page for Greenwich, CT is designed for quick trip planning, giving you a clean read on daytime highs, overnight lows, and changing conditions across the upcoming forecast window. Latest sync: Jul 17, 2026 10:15 AM EDT.
The active forecast window currently covers Jul 18 to Jul 23, 2026 for Greenwich, CT.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Jul 18 to Jul 23, 2026
- Latest sync
- Jul 17, 2026 10:15 AM EDT
- Forecast office
- OKX
- Source
- NOAA / NWS
Daily Outlook
This Week in Greenwich
Wednesday looks like the warmest upcoming period in Greenwich at 85 degrees F.
Sunday Night is the coolest period ahead with temperatures near 64 degrees F.
The strongest winds are forecast for Saturday Night at about 12 to 15 mph SW.
Precipitation is mentioned in 6 upcoming forecast periods.
Forecast Details
- Last updated
- Jul 17, 2026 10:15 AM EDT
- Coverage
- 6 days
- Time zone
- America/New_York
- Forecast office
- OKX
- Radar station
- KOKX
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
Showers and thunderstorms before 2am. Mostly cloudy. Low around 70, with temperatures rising to around 72 overnight. Southwest wind 12 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 90%. New rainfall amounts between three quarters and one inch possible.
Sunny, with a high near 82. Northwest wind around 13 mph.
Mostly clear, with a low around 64.
Sunny, with a high near 83.
Partly cloudy, with a low around 68.
A slight chance of rain showers between 8am and 2pm, then a chance of showers and thunderstorms. Partly sunny, with a high near 84. Chance of precipitation is 40%.
A chance of showers and thunderstorms before 8pm, then showers and thunderstorms. Mostly cloudy, with a low around 70. Chance of precipitation is 80%.
Rain showers likely before 2pm, then a chance of showers and thunderstorms. Partly sunny, with a high near 85. Chance of precipitation is 60%.
A chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 66. Chance of precipitation is 30%.
Sunny, with a high near 82.
Mostly clear, with a low around 66.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Saturday
Jul 18
|
Areas Of Smoke
|
81°F |
6 to 14 mph
S
|
|
Saturday Night
Jul 18
|
Showers And Thunderstorms
|
70°F |
12 to 15 mph
SW
|
|
Sunday
Jul 19
|
Sunny
|
82°F |
13 mph
NW
|
|
Sunday Night
Jul 19
|
Mostly Clear
|
64°F |
5 to 10 mph
NW
|
|
Monday
Jul 20
|
Sunny
|
83°F |
3 to 8 mph
NE
|
|
Monday Night
Jul 20
|
Partly Cloudy
|
68°F |
5 to 12 mph
S
|
|
Tuesday
Jul 21
|
Slight Chance Rain Showers then Chance Showers And Thunderstorms
|
84°F |
6 to 15 mph
S
|
|
Tuesday Night
Jul 21
|
Chance Showers And Thunderstorms then Showers And Thunderstorms
|
70°F |
15 mph
SW
|
|
Wednesday
Jul 22
|
Rain Showers Likely
|
85°F |
12 mph
W
|
|
Wednesday Night
Jul 22
|
Chance Showers And Thunderstorms then Partly Cloudy
|
66°F |
8 to 12 mph
NW
|
|
Thursday
Jul 23
|
Sunny
|
82°F |
8 mph
N
|
|
Thursday Night
Jul 23
|
Mostly Clear
|
66°F |
7 mph
N
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Greenwich.
