Old Greenwich, CT Weather Forecast
Local 7-day forecast
Sunny
Track current conditions, temperature changes, wind, and the full daily outlook for Old Greenwich, CT in one place.
Sunny, with a high near 62. Northeast wind 3 to 10 mph.
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: Oct 15, 2026 1:17 PM EDT.
The active forecast window currently covers Oct 15 to Oct 21, 2026 for Old Greenwich, CT.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Oct 15 to Oct 21, 2026
- Latest sync
- Oct 15, 2026 1:17 PM EDT
- Forecast office
- OKX
- Source
- NOAA / NWS
Daily Outlook
This Week in Old Greenwich
Friday looks like the warmest upcoming period in Old Greenwich at 74 degrees F.
Saturday Night is the coolest period ahead with temperatures near 39 degrees F.
The strongest winds are forecast for Friday Night at about 10 to 16 mph W.
Precipitation is mentioned in 6 upcoming forecast periods.
Forecast Details
- Last updated
- Oct 15, 2026 1:17 PM EDT
- Coverage
- 7 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
Rain showers likely after 2am. Mostly cloudy. Low around 52, with temperatures rising to around 58 overnight. Southeast wind 5 to 9 mph. Chance of precipitation is 60%. New rainfall amounts less than a tenth of an inch possible.
Rain showers likely before 11am, then showers and thunderstorms likely. Mostly cloudy, with a high near 74. South wind around 13 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch possible.
Showers and thunderstorms likely. Mostly cloudy. Low around 47, with temperatures rising to around 51 overnight. West wind 10 to 16 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch possible.
A chance of rain showers before 8am. Mostly sunny. High near 53, with temperatures falling to around 51 in the afternoon. Northwest wind around 16 mph, with gusts as high as 26 mph. Chance of precipitation is 40%.
Mostly clear, with a low around 39.
Sunny, with a high near 55.
A slight chance of rain showers after 8pm. Mostly clear, with a low around 43.
A slight chance of rain showers before 8am. Sunny, with a high near 60.
Partly cloudy, with a low around 47.
Mostly sunny, with a high near 64.
Partly cloudy, with a low around 48.
Sunny, with a high near 63.
Mostly clear, with a low around 47.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Today
Oct 15
|
Sunny
|
62°F |
3 to 10 mph
NE
|
|
Tonight
Oct 15
|
Mostly Cloudy then Rain Showers Likely
|
52°F |
5 to 9 mph
SE
|
|
Friday
Oct 16
|
Rain Showers Likely
|
74°F |
13 mph
S
|
|
Friday Night
Oct 16
|
Showers And Thunderstorms Likely
|
47°F |
10 to 16 mph
W
|
|
Saturday
Oct 17
|
Chance Rain Showers then Mostly Sunny
|
53°F |
16 mph
NW
|
|
Saturday Night
Oct 17
|
Mostly Clear
|
39°F |
8 to 15 mph
N
|
|
Sunday
Oct 18
|
Sunny
|
55°F |
8 mph
NW
|
|
Sunday Night
Oct 18
|
Slight Chance Rain Showers
|
43°F |
8 mph
W
|
|
Monday
Oct 19
|
Slight Chance Rain Showers then Sunny
|
60°F |
7 to 10 mph
W
|
|
Monday Night
Oct 19
|
Partly Cloudy
|
47°F |
6 to 9 mph
W
|
|
Tuesday
Oct 20
|
Mostly Sunny
|
64°F |
7 mph
NW
|
|
Tuesday Night
Oct 20
|
Partly Cloudy
|
48°F |
5 to 8 mph
N
|
|
Wednesday
Oct 21
|
Sunny
|
63°F |
6 to 9 mph
NE
|
|
Wednesday Night
Oct 21
|
Mostly Clear
|
47°F |
7 mph
NE
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Old Greenwich.
