Connecticut River at Old Lyme water level

Name: Connecticut River at Old Lyme water level (U.S. Geological Survey)
Creator: U.S. Geological Survey
License: https://www.usgs.gov/information-policies-and-instructions/copyrights-and-credits

Estuary gauge, Connecticut River, Connecticut, United States

Directions

Normal for mid-October

Water level

1.17ft Up 0.54 ft over the last 24 hours

Measured Oct 20, 2026, 10:55 AM EDT (19 min ago)

Water temperature: 58 °F

History

7 days 30 days 1 year Years compared

20252026

Water level Normal range (10–90 %)

What this means

The gauge at Connecticut River at Old Lyme reads 1.17 ft, a normal level for mid-October.

The median for mid-October is 1.29 ft, based on 23 years of readings, so the water level is 0.12 ft below typical. On the same day last year the reading was 2.08 ft, a difference of −0.91 ft.

The water is rising: up 0.54 ft over the past 24 hours. Over the past 30 days it has moved between 0.03 ft and 3.45 ft.

The water temperature at the gauge is 58 °F.

Compared with 23 years of daily readings for this time of year. How to read levels

Key numbers

Median for this date: 1.29 ft0.12 ft below the median for this date
Normal for this date: 0.92 ft – 1.92 ft8 years in 10 fall in this range (23 years of records)
Same day last year: 2.08 ft−0.91 ft
Lowest and highest in 30 days: 0.03 ft – 3.45 ft
Lowest and highest in 12 months: −0.23 ft – 2.88 ft

Weather at the gauge

Rain in the last 3 days: 0.06 in. Rain that falls upstream can take hours or days to show up at a river gauge.

20 Tue 65° 41° – Wind 15 mph

21 Wed 55° 44° – Wind 15 mph

22 Thu 64° 46° – Wind 16 mph

23 Fri 58° 40° – Wind 14 mph

24 Sat 58° 40° – Wind 9 mph

25 Sun 60° 46° – Wind 11 mph

26 Mon 63° 51° – Wind 12 mph

Forecast: Open-Meteo

Sunrise 07:07 AM Sunset 06:02 PM Daylight 10 hr, 55 min First quarter 69%

Map

Other gauges on the Connecticut River

Gauge	Level	Compared with normal	24 hours	Distance
Connecticut River at North WalpoleRiver gauge, Connecticut River	7.01 ft	Below flood stage	+0.25 ft	125 mi
Connecticut River near NorthfieldRiver gauge, Connecticut River	4,360 cfs	Low	−4,440.0 cfs	95 mi
Connecticut River at Montague CityRiver gauge, Connecticut River	7.50 ft	Below flood stage	−2.76 ft	88 mi
Connecticut River at I-391 Bridge at HolyokeRiver gauge, Connecticut River	5.84 ft	Below flood stage	−0.70 ft	62 mi
Connecticut River at ThompsonvilleRiver gauge, Connecticut River	8.24 ft	Low	−0.04 ft	49 mi
Connecticut River at HartfordTidal gauge, Connecticut River	3.45 ft	Normal	+0.39 ft	36 mi
Connecticut River at Middle HaddamTidal gauge, Connecticut River	2.56 ft	Below flood stage	+0.93 ft	19 mi
Connecticut River at EssexEstuary gauge, Connecticut River	1.73 ft	Normal	+0.71 ft	3.4 mi

Nearby gauges

Gauge	Level	Compared with normal	24 hours	Distance
East Branch Eightmile River near North LymeRiver gauge, East Branch Eightmile River	35.1 cfs	High	−2.5 cfs	8 mi
Eightmile River at North PlainRiver gauge, Eightmile River	36.7 cfs	Very high	−1.7 cfs	9 mi
Indian River near ClintonRiver gauge, Indian River	4.4 cfs	Normal	−0.2 cfs	10 mi
Salmon River near East HamptonRiver gauge, Salmon River	2.63 ft	Normal	−0.06 ft	17 mi
Yantic River at YanticRiver gauge, Yantic River	2.24 ft	High	+0.10 ft	21 mi
Coginchaug River at MiddlefieldRiver gauge, Coginchaug River	5.54 ft	Very high	−0.07 ft	24 mi
Shetucket River at TaftvilleRiver gauge, Shetucket River	294 cfs	Normal	−89.0 cfs	24 mi
Muddy River near East WallingfordRiver gauge, Muddy River	13.5 cfs	High	+1.1 cfs	24 mi

Questions and answers

Is the Connecticut River at Old Lyme higher than last year?

No, it is 0.91 ft lower than on the same day last year, when the reading was 2.08 ft.

What is a normal level for the Connecticut River at Old Lyme in mid-October?

The median for mid-October is 1.29 ft. In 8 years out of 10 the reading falls between 0.92 ft and 1.92 ft, based on 23 years of records.

What is the water level of Connecticut River at Old Lyme today?

On Oct 20, 2026, 10:55 AM EDT, the water level was 1.17 ft. Up 0.54 ft over the last 24 hours.

Is Connecticut River at Old Lyme rising or falling?

Up 0.54 ft over the last 24 hours. Down 0.75 ft over the last 7 days.

Is the level of Connecticut River at Old Lyme normal?

Normal for mid-October. Compared with 23 years of daily readings for this time of year.

How often is this data updated?

The U.S. Geological Survey publishes a new reading every 15 minutes. This page refreshes within minutes of each update.

Where does this data come from?

The values come directly from the U.S. Geological Survey, the official operator of this gauge, and are in the public domain. We do not estimate or model live values.

For specialists

Station codes, datum, parameters, data quality and downloads

Operator: U.S. Geological Survey
Station code: usgs:01194796 (Agency page)
Coordinates: 41.31249, -72.34590 (WGS84)
Vertical datum: NAVD88
Update interval: every 15 minutes
Licence: Public domain. Data: U.S. Geological Survey (USGS), provisional data subject to revision

Published series

Parameter	Last value	Time (UTC)	Quality
Water level	1.17 ft	2026-10-20 14:55	Provisional
Water temperature	58 °F	2026-10-20 14:45	Provisional

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How to cite

U.S. Geological Survey: Connecticut River at Old Lyme (usgs:01194796). Accessed October 20, 2026 via Nivelmap, https://nivelmap.com/en/united-states/connecticut/connecticut-river-at-old-lyme

How we check values

Each reading is stored as published. We hold back values that jump faster than physically plausible and show the measurement time with every value.

Readings are provisional, can be delayed or wrong and are not a flood warning. Read the disclaimer