Station Name: CONNECTICUT RIVER AT OLD LYME, CT
Data Source: Water Data - usgc.gov

Elevation Above Sea Level: 20 feet

Nearest Address:
336 Ferry Rd
Old Lyme, CT 06371
New London County

GPS Coordinates: 41.3125983, -72.3459166

Nearby Water Temperatures

Heat Advisory issued July 15 at 2:30AM EDT until July 15 at 9:00PM EDT by NWS Upton NY

Effective: Wed July 15, 2026, 2:30 AM
Expires: Wed July 15, 2026, 9:00 PM

* WHAT...Heat index values up to 101 expected. * WHERE...In Connecticut, Southern Middlesex and Southern New London Counties. In New York, Northeast Suffolk, Southeast Suffolk, and Southwest Suffolk Counties. * WHEN...From 11 AM this morning to 9 PM EDT this evening. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses.

A Heat Advisory is issued when the combination of heat and humidity is expected to make it feel like it is 95 to 99 degrees for two or more consecutive days, or 100 to 104 degrees for any length of time. Seniors and those with chronic health problems or mental health conditions are at an increased risk. Homes without air conditioning can be much hotter than outdoor temperatures. Use air conditioning to stay cool at home or go to a place that has air conditioning. If you don't have home air conditioning, continue to seek out cool spaces each day as long as it remains hot, and for a few days after if your home is still hot. Check on vulnerable friends, family members and neighbors. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! In cases of heat stroke call 9 1 1.

Heat Advisory issued July 15 at 12:40AM EDT until July 15 at 8:00PM EDT by NWS Boston/Norton MA

Effective: Wed July 15, 2026, 12:40 AM
Expires: Wed July 15, 2026, 8:00 PM

* WHAT...Heat index values between 95 and 98 degrees. * WHERE...Portions of northern Connecticut, southeastern Massachusetts, and northern and southern Rhode Island. * WHEN...Until 8 PM EDT this evening. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses.

Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors.

Air Quality Alert issued July 15 at 9:13AM EDT by NWS Boston/Norton MA

Effective: Wed July 15, 2026, 9:13 AM
Expires: Thu July 16, 2026, 12:00 AM

The Connecticut Department of Environmental Protection has issued an Air Quality Alert Day for Fine Particulates, until midnight EDT tonight. An Air Quality Alert day means that Fine Particulates concentrations within the region may approach or exceed unhealthy standards. For additional information, please visit the Connecticut Department of Energy and Environmental Protection website at: https://portal.ct.gov/deep

Air Quality Alert issued July 15 at 9:09AM EDT by NWS Boston/Norton MA

Effective: Wed July 15, 2026, 9:09 AM
Expires: Thu July 16, 2026, 12:00 AM

The Connecticut Department of Environmental Protection has issued an Air Quality Alert Day for Fine Particulates, until midnight EDT tonight. An Air Quality Alert day means that Fine Particulates concentrations within the region may approach or exceed unhealthy standards. For additional information, please visit the Connecticut Department of Energy and Environmental Protection website at: https://portal.ct.gov/deep

Air Quality Alert issued July 15 at 8:50AM EDT by NWS Boston/Norton MA

Effective: Wed July 15, 2026, 8:50 AM
Expires: Thu July 16, 2026, 12:00 AM

The Connecticut Department of Environmental Protection has issued an Air Quality Alert Day for Ground Level Ozone, until midnight EDT tonight. An Air Quality Alert day means that Ground Level Ozone concentrations within the region may approach or exceed unhealthy standards. For additional information, please visit the Connecticut Department of Energy and Environmental Protection website at: https://portal.ct.gov/deep