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Shaded-relief map of East Haddam, Connecticut: rivers, roads, the city limits and where the water drains.
CONNECTICUT · LOWER CONNECTICUT RIVER VALLEY PLANNING REGION

East Haddam

9,061 people, 50 ft above sea level in Lower Connecticut River Valley Planning Region.

50 ftElevation, city center
9,061People, 2024 estimate
54 sq miLand area
Sunny 44°
Sunny now Dew point 28° · NW 7 mph · high 45°
City of East Haddam River Interstate 2 miles
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The East Haddam plate. Relief from Copernicus GLO-30; rivers and lakes from USGS NHD; watersheds from the USGS Watershed Boundary Dataset; roads and city limits from Census TIGER 2024.

MILE1
TODAY

Today in East Haddam

NWS forecast and National Blend of Models · updated 3:00 PM EST
RIGHT NOW Meriden Markham Municipal Airport (KMMK) · 2:53 PM
Sunny
44° Sunny Feels like 40° · high of 45° near 3 PM
WindNW 7 mphno gusts
Humidity53%rising to 85% by morning
Pressure29.73 in →steady
Visibility10 mihaze-free
CloudsClear
UV index—no forecast
Dew point 28° · Dryabout the same for three days
DryComfortableStickyMuggyOppressive
NEXT RAIN
Clear
Not this weeknone in the forecast for a week
LIKELY AMOUNT—nothing expected
LAST RAINNov. 90.01 in · 5 dry days
ALERTS & OUTLOOKS
No watches or warnings for Lower Connecticut River Valley Planning Region
NWS Upton and the Storm Prediction Center · checked 3:45 PM
SUN & MOON
↑ 6:36 AM4:31 PM ↓
9 h 54 m of daylight, 2 minutes less than yesterday
Waxing crescent, 25% lit. Next full moon: Nov. 24.
AIR & POLLEN
9
GOODAir quality index · fine particles
Tomorrow: 17, good. No pollen source yet.

The next three days, hour by hour

Sky: clear, cloudy, night Rain likely National Blend of Models
SATURDAY, NOV. 14
SUNDAY, NOV. 15
MONDAY, NOV. 16
TUESDAY, NOV. 17
3p
6p
9p
Mid
3a
6a
9a
Noon
3p
6p
9p
Mid
3a
6a
9a
Noon
3p
6p
9p
Mid
3a
6a
9a
Noon
mostly cloudy day
partly cloudy night
mostly clear night
partly cloudy night
mostly clear night
clear day
clear day
mostly sunny
partly cloudy day
partly cloudy night
clear night
mostly clear night
mostly clear night
partly cloudy day
mostly sunny
partly cloudy day
mostly sunny
mostly clear night
clear night
clear night
clear night
clear day
clear day
mostly sunny
TEMPERATURE °F
45°
34°
50°
33°
50°
33°
CHANCE OF RAIN
50%
WIND, MPH
8
5
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8
8
10
10
8
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HOW IT FEELS · DEW POINT
Dry: dew points 24 to 34° More humid: 34° by Tuesday

The next seven days, and how sure we are

Forecast, with the range 8 in 10 ensemble members agree on Normal, about 80° / 62°
SAT Nov. 14 Mostly cloudy Mostly cloudy
45° 33°
0% rain — NW 8 A
SUN Nov. 15 Mostly sunny Mostly sunny
50° 32°
0% rain — NNW 9 A
MON Nov. 16 Mostly sunny Mostly sunny
52° 33°
0% rain — NNW 7 A
TUE Nov. 17 Sunny Sunny
56° 37°
0% rain — WNW 3 A
WED Nov. 18 Mostly sunny Mostly sunny
60° 39°
0% rain — W 5 A
THU Nov. 19 Mostly sunny Mostly sunny
62° 41°
0% rain — WSW 5 B
FRI Nov. 20 Mostly sunny Mostly sunny
62° 41°
0% rain — NW 5 B
How sure are we? AModels agree: highs within 4° BSome spread: within 8° CWide spread: check back
Range from the National Blend of Models percentiles · graded on Forecast Scores
AIR MAIL

Where today’s air came from

The air arriving over East Haddam about 5,000 feet above the ground was over the Canadian Prairies three days ago, and over the Great Lakes a day ago, about 2,310 miles back along its path. Near the ground the air came from the Canadian Prairies; at 10,000 feet, from British Columbia. It feels dry all the same. Traced back 72 hours through NOAA’s hourly RAP analyses and the GFS beyond them, nine paths at each of three heights.

MILE2
THE GROUND

What East Haddam stands on

East Haddam’s center stands about 50 ft above sea level. Within three miles the land runs from 0 ft to 590 ft, a difference of 590 ft: hilly country. Open water lies within three miles. The highest named summit within 15 miles is Meshomasic Mountain, about 910 ft, 13 miles north-northwest.

Under the town center the state geologic map shows Hebron Gneiss (schist, calc-silicate-rock), from the Neoproterozoic, 542 to 1,000 million years old.

The section below crosses 10 rock units mapped at the surface.

Old Saybrook to Portland, cut in half

A section south to north, 24 miles through the town center
0 ft250 ft500 ft750 ft EAST HADDAM50 ftOld Saybrook30 ftEssex50 ftConnecticut Riversea levelEast Hampton430 ftRaccoon Hill770 ft ← S · Old SaybrookPortland · N →

Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 23×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.

Rock at the surface along the line

Hebron Gneiss

Schist, calc-silicate-rock. Age: Neoproterozoic, 542 to 1,000 million years old. About 7 mi of the line.

Tatnic Hill Formation

Gneiss, schist. Age: Neoproterozoic, 542 to 1,000 million years old. About 5 mi of the line.

Rope Ferry Gneiss

Gneiss. Age: Neoproterozoic, 617 to 623 million years old. About 4 mi of the line.

Monson Gneiss

Gneiss, amphibolite. Age: Early Ordovician to Middle Ordovician, 459 to 487 million years old. About 1 mi of the line.

Littleton Formation

Schist, quartzite. Age: Devonian, 359 to 422 million years old. About 1 mi of the line.

Brimfield Schist (Includes Hamilton Resevoir Formation)

Schist, gneiss. Age: Cambrian to Ordovician, 445 to 542 million years old. About 1 mi of the line.

From the USGS State Geologic Map Compilation (Horton and others, 2017), the states’ geologic maps joined at a common scale. 4 smaller units along the line are not listed.

Heights from Copernicus GLO-90 (a surface model: it includes buildings and tree canopy); summits from USGS GNIS; rivers from USGS NHDPlus HR; rock from the USGS State Geologic Map Compilation.
MILE3
THE WATER

Where East Haddam’s rain goes

A raindrop that lands in East Haddam reaches Long Island Sound and the Atlantic Ocean by way of the Roaring Brook Number 2 and the Connecticut: about 20 river miles.

THE WAY DOWN, TO SCALE
East Haddam≈ 20 mi · Long Island Sound and the Atlantic Ocean
FROM THE CENTER OF EAST HADDAM ≈ 20 mi to Long Island Sound and the Atlantic Ocean Roaring Brook Number 2 → Connecticut

Traced down the USGS NHDPlus V2.1 river network from the Census center point of East Haddam; river miles along the main stem, rounded.

MILE7
ON THE NETWORK

Around East Haddam on the Forecast Network

Neighboring plates

Hartford CT · 25 MI 25 miles northwest New Haven CT · 30 MI 30 miles southwest Brookhaven NY · 52 MI 52 miles southwest Hempstead NY · 86 MI 86 miles southwest Boston MA · 92 MI 92 miles northeast New York NY · 98 MI 98 miles southwest
FORECASTCITY
Map of East Haddam, Connecticut. Explore the plate
CONNECTICUT · LOWER CONNECTICUT RIVER VALLEY

East Haddam

9,061 people, 50 ft above sea level in Lower Connecticut River Valley Planning Region.

50 ftElevation
9,061People
54 sq miLand
Sunny 44°
SunnyDew point 28°
1

Today in East Haddam

NEXT 15 HOURS
Now mostly cloudy day 45° 0%
6p mostly cloudy night 41° 1%
9p partly cloudy night 38° 1%
12a partly cloudy night 36° 1%
3a partly cloudy night 34° 1%
6a clear night 34° 1%
Clear
NEXT RAINNone this week
→
Sat0%
Mostly cloudy Mostly cloudy
33
45
A
Sun0%
Mostly sunny Mostly sunny
32
50
A
Mon0%
Mostly sunny Mostly sunny
33
52
A
Tue0%
Sunny Sunny
37
56
A
Wed0%
Mostly sunny Mostly sunny
39
60
A
Thu0%
Mostly sunny Mostly sunny
41
62
B
Fri0%
Mostly sunny Mostly sunny
41
62
B
Letters show how sure the forecast is: A, models agree; B, some spread; C, check back. Sample data.
2

What East Haddam stands on

East Haddam’s center stands about 50 ft above sea level. Within three miles the land runs from 0 ft to 590 ft, a difference of 590 ft: hilly country. Open water lies within three miles. The highest named summit within 15 miles is Meshomasic Mountain, about 910 ft, 13 miles north-northwest.

East Haddam, south to north East Haddam50 ftConnecticut Riversea levelRaccoon Hill770 ft ← SN → 24 miles through the town center; vertical exaggeration about 44×. Colors: rock at the surface.
Elevation, center50 ft
Within 3 miles0 to 590 ft
Lie of the landHilly (590 ft of relief)
High point nearbyMeshomasic Mountain, 910 ft, 13 mi north-northwest
Rock at the surfaceHebron Gneiss
Its ageNeoproterozoic, 542 to 1,000 million years old
3

Where the rain goes

≈ 20 mito the AtlanticRoaring Brook Number 2 → Connecticut

A raindrop that lands in East Haddam reaches Long Island Sound and the Atlantic Ocean by way of the Roaring Brook Number 2 and the Connecticut: about 20 river miles.