Old Greenwich, Connecticut 7 Day & Night Forecast & Conditions

Current Conditions

Maps Alerts Climate Index

Overcast 75°F 24°C Heat Index: 75°F	Observed at: Old Greenwich, CT	Elevation: 50 ft | 15 m
	Last Updated: July 27, 9:15 PM Timezone: GMT -5/-4
	Sky Conditions: Overcast	Temperature: 75°F | 24°C
	Pressure: 29.76 in | 1007.8 mb	Dewpoint: 67°F | 19°C
	Humidity: 76%	Wind: S 7 mph | S 11 kph
	Feels Like: 78°F | 26°C	Visibility: 41 mi | 65.9 km
	Lat/Long: 41.0272 | -73.5661	Sunrise: 5:45 AM   Sunset: 8:15 PM

7 Day Graphical Forecast

Valid: 8:59 PM 7/29/2026

Tonight Overcast 65 °F 16% Chance Precipitation Tuesday Heavy Rain 81 |69 °F 62% Chance Precipitation Wednesday Heavy Rain 83 |68 °F 82% Chance Precipitation Thursday Thunderstorm 78 |65 °F 61% Chance Precipitation Friday Drizzle 76 |65 °F 30% Chance Precipitation Saturday Overcast 78 |64 °F 9% Chance Precipitation Sunday Drizzle 78 |67 °F 22% Chance Precipitation

7 Hour Graphical Forecast

Valid: 8:59 PM 7/29/2026

8 PM Overcast 71 °F 78% Chance Precipitation

9 PM Clear 69 °F 53% Chance Precipitation

10 PM Clear 68 °F 53% Chance Precipitation

11 PM Overcast 68 °F 53% Chance Precipitation

12 AM Overcast 68 °F 53% Chance Precipitation

1 AM Overcast 67 °F 53% Chance Precipitation

2 AM Overcast 68 °F 53% Chance Precipitation

7 Day Textual Forecast - with QPF, Max Wind, Humidity, Snowfall & UV Index

7 Day & Night Weather Forecast for Old Greenwich, CT - (Fahrenheit & Celsius) Valid: 8:59 PM 7/29/2026 Tonight Overcast with a low around 65°F [18°C]. SSE wind to around 13 mph [20 kph], with gusts to near 18 mph [28 kph]. Chance of precipitation 16% with QPF of 0.00 in [0.0 mm]. Tuesday Heavy Rain with a high near 81°F [27°C]. S wind to around 25 mph [40 kph], with gusts to near 38 mph [61 kph]. Dewpoint near 67°F [19°C] with humidity of 97%. Pressure around 29.76 in [1007.8 mb]. UV Index: 6.05. Chance of precipitation 62% with QPF of 3.47 in [88.2 mm]. Tuesday Night Heavy Rain with a low around 69°F [20°C]. S wind to around 25 mph [40 kph], with gusts to near 38 mph [61 kph]. Chance of precipitation 62% with QPF of 3.47 in [88.2 mm]. Wednesday Heavy Rain with a high near 83°F [28°C]. W wind to around 14 mph [23 kph], with gusts to near 24 mph [38 kph]. Dewpoint near 67°F [19°C] with humidity of 96%. Pressure around 29.76 in [1007.8 mb]. UV Index: 7.4. Chance of precipitation 82% with QPF of 0.79 in [20.0 mm]. Wednesday Night Heavy Rain with a low around 68°F [20°C]. W wind to around 14 mph [23 kph], with gusts to near 24 mph [38 kph]. Chance of precipitation 82% with QPF of 0.79 in [20.0 mm]. Thursday Thunderstorm with a high near 78°F [26°C]. NNW wind to around 10 mph [16 kph], with gusts to near 18 mph [29 kph]. Dewpoint near 67°F [19°C] with humidity of 89%. Pressure around 29.76 in [1007.8 mb]. UV Index: 7.4. Chance of precipitation 61% with QPF of 0.20 in [5.0 mm]. Thursday Night Thunderstorm with a low around 65°F [18°C]. NNW wind to around 10 mph [16 kph], with gusts to near 18 mph [29 kph]. Chance of precipitation 61% with QPF of 0.20 in [5.0 mm]. Friday Drizzle with a high near 76°F [25°C]. NNE wind to around 7 mph [12 kph], with gusts to near 16 mph [26 kph]. Dewpoint near 67°F [19°C] with humidity of 90%. Pressure around 29.76 in [1007.8 mb]. UV Index: 6.6. Chance of precipitation 30% with QPF of 0.08 in [1.9 mm]. Friday Night Drizzle with a low around 65°F [19°C]. NNE wind to around 7 mph [12 kph], with gusts to near 16 mph [26 kph]. Chance of precipitation 30% with QPF of 0.08 in [1.9 mm]. Saturday Overcast with a high near 78°F [26°C]. SE wind to around 8 mph [13 kph], with gusts to near 12 mph [19 kph]. Dewpoint near 67°F [19°C] with humidity of 90%. Pressure around 29.76 in [1007.8 mb]. UV Index: 6.8. Chance of precipitation 9% with QPF of 0.00 in [0.0 mm]. Saturday Night Overcast with a low around 64°F [18°C]. SE wind to around 8 mph [13 kph], with gusts to near 12 mph [19 kph]. Chance of precipitation 9% with QPF of 0.00 in [0.0 mm]. Sunday Drizzle with a high near 78°F [25°C]. SSE wind to around 8 mph [12 kph], with gusts to near 15 mph [25 kph]. Dewpoint near 67°F [19°C] with humidity of 95%. Pressure around 29.76 in [1007.8 mb]. UV Index: 3.3. Chance of precipitation 22% with QPF of 0.17 in [4.2 mm]. Sunday Night Drizzle with a low around 67°F [20°C]. SSE wind to around 8 mph [12 kph], with gusts to near 15 mph [25 kph]. Chance of precipitation 22% with QPF of 0.17 in [4.2 mm].

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7 Day and Night - QPF Forecast for Old Greenwich, CT

Tonight: 0.0 mm | 0.00 in

Tuesday: 88.2 mm | 3.47 in

Tuesday Night: 88.2 mm | 3.47 in

Wednesday: 20.0 mm | 0.79 in

Wednesday Night: 20.0 mm | 0.79 in

Thursday: 5.0 mm | 0.20 in

Thursday Night: 5.0 mm | 0.20 in

Friday: 1.9 mm | 0.08 in

Friday Night: 1.9 mm | 0.08 in

Saturday: 0.0 mm | 0.00 in

Saturday Night: 0.0 mm | 0.00 in

Sunday: 4.2 mm | 0.17 in

Sunday Night: 4.2 mm | 0.17 in

7 Day and Night - Maximum Wind Speed Forecast for Old Greenwich, CT

Tonight: SSE @ 20 kph | 13 mph

Tuesday: S @ 40 kph | 25 mph

Tuesday Night: S @ 40 kph | 25 mph

Wednesday: W @ 23 kph | 14 mph

Wednesday Night: W @ 23 kph | 14 mph

Thursday: NNW @ 16 kph | 10 mph

Thursday Night: NNW @ 16 kph | 10 mph

Friday: NNE @ 12 kph | 7 mph

Friday Night: NNE @ 12 kph | 7 mph

Saturday: SE @ 13 kph | 8 mph

Saturday Night: SE @ 13 kph | 8 mph

Sunday: SSE @ 12 kph | 8 mph

Sunday Night: SSE @ 12 kph | 8 mph

7 Day and Night - Maximum Humidity Forecast for Old Greenwich, CT

Tonight: 90 %

Tuesday: 97 %

Tuesday Night: 97 %

Wednesday: 96 %

Wednesday Night: 96 %

Thursday: 89 %

Thursday Night: 89 %

Friday: 90 %

Friday Night: 90 %

Saturday: 90 %

Saturday Night: 90 %

Sunday: 95 %

Sunday Night: 95 %

7 Day and Night - Snowfall Totals Forecast for Old Greenwich, CT

Tonight: 0.0 cm | 0.00 in

Tuesday: 0.0 cm | 0.00 in

Tuesday Night: 0.0 cm | 0.00 in

Wednesday: 0.0 cm | 0.00 in

Wednesday Night: 0.0 cm | 0.00 in

Thursday: 0.0 cm | 0.00 in

Thursday Night: 0.0 cm | 0.00 in

Friday: 0.0 cm | 0.00 in

Friday Night: 0.0 cm | 0.00 in

Saturday: 0.0 cm | 0.00 in

Saturday Night: 0.0 cm | 0.00 in

Sunday: 0.0 cm | 0.00 in

Sunday Night: 0.0 cm | 0.00 in

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