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

Air Quality Alert issued May 18 at 9:44AM EDT by NWS Upton NY

Non-Weather Emergency Message. Not sent to IPAWS.

Effective: Mon May 18, 2026, 9:44 AM
Expires: Mon May 18, 2026, 11:00 PM

The Connecticut Department of Energy and Environmental Protection's Air Quality Action Day for the following counties: Fairfield, New Haven, and Middlesex, remains in effect until 11 PM EDT this evening. An Air Quality Action Day means that Ground Level Ozone within the region may approach or exceed unhealthy standards. For additional information, please visit the Connecticut Department of Energy and Environmental Protection Web site at http://www.ct.gov/deep/aqi

Air Quality Alert issued May 18 at 9:40AM EDT by NWS Upton NY

Non-Weather Emergency Message. Not sent to IPAWS.

Effective: Mon May 18, 2026, 9:40 AM
Expires: Mon May 18, 2026, 11:00 PM

The Connecticut Department of Energy and Environmental Protection's Air Quality Action Day for the following counties: Fairfield, New Haven, and Middlesex, remains in effect until 11 PM EDT this evening. An Air Quality Action Day means that Ground Level Ozone within the region may approach or exceed unhealthy standards. For additional information, please visit the Connecticut Department of Energy and Environmental Protection Web site at http://www.ct.gov/deep/aqi

Air Quality Alert issued May 18 at 8:48AM EDT by NWS Upton NY

Non-Weather Emergency Message. Not sent to IPAWS.

Effective: Mon May 18, 2026, 8:48 AM
Expires: Mon May 18, 2026, 11:00 PM

The Connecticut Department of Energy and Environmental Protection has issued an Air Quality Action Day for the following counties: Fairfield, New Haven, and Middlesex, until 11 PM EDT this evening. An Air Quality Action Day means that Ground Level Ozone within the region may approach or exceed unhealthy standards. For additional information, please visit the Connecticut Department of Energy and Environmental Protection Web site at http://www.ct.gov/deep/aqi

Heat Advisory issued May 18 at 12:57PM EDT until May 20 at 8:00PM EDT by NWS Boston/Norton MA

Effective: Mon May 18, 2026, 12:57 PM
Expires: Tue May 19, 2026, 7:00 AM

* WHAT...Heat index values up to 96 expected. * WHERE...Much of Southern New England, except for the eastern slopes of the Berkshires, the Rhode Island and Massachusetts South Coast, Cape Cod and the Islands. * WHEN...From 11 AM Tuesday to 8 PM EDT Wednesday. * IMPACTS...Hot temperatures, a moderate degree of humidity with little relief Tuesday night may cause heat illnesses. * ADDITIONAL DETAILS...This is the first multi-day period of hot temperatures. Those not yet accustomed to hot temperatures with a moderate degree of humidity should take appropriate heat-related precautions.

Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives, neighbors and pets. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke.

Air Quality Alert issued May 18 at 12:19PM EDT by NWS Boston/Norton MA

Non-Weather Emergency Message. Not sent to IPAWS.

Effective: Mon May 18, 2026, 12:19 PM
Expires: Mon May 18, 2026, 11:00 PM

The Rhode Island Department of Environmental Management has issued an Air Quality Alert Day for Ground Level Ozone, from 11 AM to 11 PM EDT Tuesday. An Air Quality Alert means that Ground Level Ozone concentrations within the region are expected to reach unhealthy levels. For additional information, please visit the Rhode Island Department of Environmental Management website at: https://dem.ri.gov/environmental-protection-bureau/air- resources/air-quality-forecast