Old Greenwich, CT Weather Forecast
Local 7-day forecast
Mostly Sunny
Track current conditions, temperature changes, wind, and the full daily outlook for Old Greenwich, CT in one place.
Mostly sunny, with a high near 56.
Local Weather Overview
This forecast page for Old 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: Apr 9, 2026 7:39 AM EDT.
The active forecast window currently covers Apr 12 to Apr 15, 2026 for Old Greenwich, CT.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Apr 12 to Apr 15, 2026
- Latest sync
- Apr 9, 2026 7:39 AM EDT
- Forecast office
- OKX
- Source
- NOAA / NWS
Daily Outlook
This Week in Old Greenwich
Tuesday looks like the warmest upcoming period in Old Greenwich at 78 degrees F.
Sunday Night is the coolest period ahead with temperatures near 48 degrees F.
The strongest winds are forecast for Monday at about 12 to 17 mph S.
Precipitation is mentioned in 3 upcoming forecast periods.
Forecast Details
- Last updated
- Apr 9, 2026 7:39 AM EDT
- Coverage
- 4 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
Mostly cloudy, with a low around 48.
Mostly cloudy, with a high near 68.
A slight chance of rain showers between 8pm and 2am. Mostly cloudy, with a low around 59.
Mostly sunny, with a high near 78.
A slight chance of rain showers between 8pm and 2am. Mostly cloudy, with a low around 62.
A slight chance of rain showers after 2pm. Partly sunny, with a high near 78.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Sunday
Apr 12
|
Mostly Sunny
|
56°F |
3 to 13 mph
E
|
|
Sunday Night
Apr 12
|
Mostly Cloudy
|
48°F |
14 mph
S
|
|
Monday
Apr 13
|
Mostly Cloudy
|
68°F |
12 to 17 mph
S
|
|
Monday Night
Apr 13
|
Slight Chance Rain Showers
|
59°F |
13 to 17 mph
SW
|
|
Tuesday
Apr 14
|
Mostly Sunny
|
78°F |
12 to 16 mph
SW
|
|
Tuesday Night
Apr 14
|
Slight Chance Rain Showers
|
62°F |
10 to 16 mph
SW
|
|
Wednesday
Apr 15
|
Partly Sunny then Slight Chance Rain Showers
|
78°F |
10 to 14 mph
SW
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Old Greenwich.
