Home / Local Weather & Traffic / Connecticut / Old Greenwich / Current Weather

Current Weather in Old Greenwich, CT

Updated: Fri Oct 9th 2026 5:15 PM EDT

Overcast

68^°F 20^°C

Feels Like 61^°F / 16^°C

Old Greenwich, CT weather condition is Overcast and 68°F.

Today's Weather in Old Greenwich,CT

The current weather in Old Greenwich CT as of 5:15 PM EDT on Fri Oct 9th 2026, has a sky condition of Overcast with the visibility of 6 mile(s) and the UV index at 0.5. It is 68 degrees fahrenheit but feels like 61 degrees with a forecasted high of 70 and low of 58. The barometric pressure is 30.14 - measured by inches of mercury - and is rising since its last observation. The humidity is 42 percent that's rising since the last report, with a dew point of 44 degrees fahrenheit which is falling. Wind direction is from the Northwest at 10.3 miles per hour, gusting at 17 miles per hour. Sunrise was at 6:59 AM and Sunset is at 6:23 PM. The moon phase is a New Moon moon rising at 5:39 AM with 1% illumination. Thank you for listening to the weather report from LocalConditions.com!

Listen to this weather report - press Read

Barometer 30.14 inHg. rising
Humidity 42% rising
Heat Index 68°F
Wind from NW. 10.3 mph
Wind Gust 17 miles per hour
Wind Chill 68°F
UV Index 0.5

Dew Point 44°F falling
Visibility 6 mi.
Sunrise 6:59 AM
Sunset 6:23 PM
Moonrise 5:39 AM
Moonset 5:38 PM
Moon Phase New Moon Moon 1%

Ask About Weather

Test our Weather Chatbot. It provides up to 10 days of forecast information! You can ask questions like "Will it rain tomorrow?" or "What's the fishing conditions like for the morning", or "What is the barometric pressure tonight".

Radar Alerts Next 48 Hours Traffic

Hourly Forecast - Next 8 hours

10 Day Forecast

Sunny

Sunny with a high of 70°F and a low of 58°F. 4% possible chance of rain predicted. Winds will be moderate, blowing around 14mph. Humidity levels are comfortable, sitting around 49%.

Temperature	Humidity	Rainfall	Snow	Wind
Hi 70° \| Lo 58°	49%	4%	0%	13.2 mph

Overcast

Overcast with a high of 63°F and a low of 56°F. 11% possible chance of rain predicted. Winds will be light at 9mph at times. Humidity levels are comfortable, sitting around 51%.

Temperature	Humidity	Rainfall	Snow	Wind
Hi 63° \| Lo 56°	51%	11%	0%	8.7 mph

Overcast

Overcast with a high of 64°F and a low of 60°F. Probable rainfall forecasted, having an 85% chance with an estimated 0.5in. Winds will be strong at speeds peaking at 23mph. The humidity will be on the higher side, reaching around 73%.

Temperature	Humidity	Rainfall	Snow	Wind
Hi 64° \| Lo 60°	73%	85% \| est. 0.5in	0%	22.1 mph

Scattered Showers

Scattered Showers with a high of 70°F and a low of 58°F. Probable rainfall forecasted, having a 64% chance with an estimated 0.07in. Winds will be strong at speeds peaking at 22mph. Expect high humidity with levels above 80% to 83%.

Temperature	Humidity	Rainfall	Snow	Wind
Hi 70° \| Lo 58°	83%	64% \| est. 0.07in	0%	21.3 mph

Sunny

Sunny with a high of 75°F and a low of 61°F. Probable rainfall forecasted, having a 50% chance with an estimated 0.04in. Winds will be moderate, blowing around 16mph. The humidity will be on the higher side, reaching around 75%.

Temperature	Humidity	Rainfall	Snow	Wind
Hi 75° \| Lo 61°	75%	50% \| est. 0.04in	0%	15.2 mph

Yesterday 5-Day 10-Day

Weather Radar Map

Live Old Greenwich, CT weather with granular precipitation, radar, barometric pressure, temperatures and wind speeds for today thru Tuesday, as you toggle through each map layer. Use the slider to move forward and back in time to view how current data and forecasts will affect the region; you can press or click on the map to show metrics available for each tab. The related timestamp is located above the Play button which will animate the weather forecast.

Hourly Temperature

The current temperature today is 68^°F. The morning temperature of 58°^F is lowest at 4am with the daytime high of 70°^F at 3pm and a low around 63°^F at 9pm is expected.

Hourly Barometric Pressure

The highest pressure today is 30.26^inHg at 10pm and lowest being 30.02^inHg at 12am.

Hourly Wind Speeds

The fastest wind is reported to be 13.2^mph at 1pm, while the slowest is 4^mph around 10pm; expect wind gusts peaking 24.4^mph at 12am.

More Weather Charts

Current National Weather

Hurricane Isaias Impacting the Gulf Coast; Heavy Rains Expected in Southern California - 10-09 to 10-11

Updated Fri Oct 9th 2026, 1:30am PDT

A serious situation is unfolding as Hurricane Isaias makes its way toward the eastern Gulf coast on Friday, expected to bring strong winds and flooding from the Florida Panhandle to parts of Alabama and Georgia. Meanwhile, Tropical Storm Rachel could bring heavy rain and potential flooding to Southern California and the Southwest starting late Saturday. Additionally, a significant pattern change will bring cooler weather to the West, ending the ongoing heatwave, and possible snow in the Northern Rockies on Saturday.

Friday's Weather

Hurricane Isaias will begin its impact on the Gulf coast. Expect strong winds and heavy rain moving from the eastern Gulf Coastal area into the Tennessee Valley and Southern Appalachians. Coastal areas, especially the Florida Panhandle and southern Alabama, will experience storm surges and potential flooding.

Saturday & Sunday Outlook

The remains of Hurricane Isaias will travel northeast, impacting the Ohio Valley and Mid-Atlantic regions, although the storm will weaken over time. As for Tropical Storm Rachel, its moisture will start affecting Southern California, the Southwest, and the Great Basin with potential for heavy rains and flooding. This is due to increased moisture levels from the storm.

Western Weather Changes

California's heatwave will come to an end as cooler temperatures move in from the Pacific Northwest. Temperatures will drop across the region, leading to much cooler weather by Sunday. Northern Rockies in Montana may even see early season snowfall due to the cold air settling in.

This weather report is valid for ZIP code 06870, accurately covering the area of Old Greenwich, CT.