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Shaded-relief atlas plate of Groton, Connecticut: rivers, roads, the city limits and where the water drains.
CONNECTICUT · SOUTHEASTERN CONNECTICUT PLANNING REGION

Groton

10,160 people, 40 ft above sea level in Southeastern Connecticut Planning Region.

40 ftElevation, city center
10,160People, 2024 estimate
3 sq miLand area
Sunny 67°
Sunny now Dew point 58° · NNW 5 mph · high 67°
City of Groton River Interstate 2 miles
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The Groton 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 Groton

NWS forecast and National Blend of Models · updated 4:00 PM EDT
RIGHT NOW Groton / New London Airport (KGON) · 3:56 PM
Sunny
67° Sunny Feels like 67° · high of 67° near 4 PM
WindNNW 5 mphno gusts
Humidity73%rising to 100% by morning
Pressure29.95 in →steady
Visibility10 mihaze-free
CloudsClear
UV index—no forecast
Dew point 58° · Comfortableabout the same for three days
DryComfortableStickyMuggyOppressive
NEXT RAIN
Rain
Friday30% chance · showers
LIKELY AMOUNT—amounts come within 3 days
LAST RAINSept. 270.36 in · 2 dry days
ALERTS & OUTLOOKS
No watches or warnings for Southeastern Connecticut Planning Region
NWS Upton and the Storm Prediction Center · checked 4:47 PM
SUN & MOON
↑ 6:42 AM6:34 PM ↓
11 h 51 m of daylight, 3 minutes less than yesterday
Waning gibbous, 89% lit. The Harvest Moon was full Saturday.
AIR & POLLEN
18
GOODAir quality index · ozone
Tomorrow: 44, good. No pollen source yet.

The next three days, hour by hour

Sky: clear, cloudy, night Rain likely National Blend of Models
TUESDAY, SEPT. 29
WEDNESDAY, SEPT. 30
THURSDAY, OCT. 1
FRIDAY, OCT. 2
4p
7p
10p
1a
4a
7a
10a
1p
4p
7p
10p
1a
4a
7a
10a
1p
4p
7p
10p
1a
4a
7a
10a
1p
mostly cloudy day
mostly cloudy night
partly cloudy night
partly cloudy night
partly cloudy night
partly cloudy day
mostly sunny
partly cloudy day
partly cloudy day
partly cloudy night
partly cloudy night
mostly cloudy night
mostly cloudy night
mostly cloudy day
partly cloudy day
mostly sunny
partly cloudy day
partly cloudy night
partly cloudy night
partly cloudy night
partly cloudy night
partly cloudy day
mostly sunny
partly cloudy day
TEMPERATURE °F
67°
55°
69°
60°
73°
65°
CHANCE OF RAIN
50%
WIND, MPH
6
3
1
0
0
2
0
7
6
5
5
3
5
6
10
13
12
9
8
8
9
9
12
13
HOW IT FEELS · DEW POINT
Sticky: dew points 55 to 65°

The next seven days, and how sure we are

Forecast, with the range 8 in 10 ensemble members agree on Normal, about 69° / 52°
TUE Sept. 29 Mostly cloudy Mostly cloudy
67° 54°
0% rain — W 6 A
WED Sept. 30 Partly cloudy Partly cloudy
70° 58°
0% rain — SSW 4 A
THU Oct. 1 Partly cloudy Partly cloudy
73° 63°
0% rain — SW 10 A
FRI Oct. 2 Chance of showers Chance of showers
76° 59°
30% rain up to 0.05″ WSW 10 A
SAT Oct. 3 Partly cloudy Partly cloudy
69° 49°
10% rain — ENE 5 B
SUN Oct. 4 Chance of showers Chance of showers
64° 50°
40% rain up to 0.7″ E 6 B
MON Oct. 5 Mostly sunny Mostly sunny
64° 44°
20% rain — NW 10 C
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 Groton about 5,000 feet above the ground was over the Atlantic off the Carolinas three days ago, and over New England a day ago, about 1,260 miles back along its path. It rose from near the ground on the way. Near the ground the air came from Canada; at 10,000 feet, from the western Atlantic. Traced back 72 hours through NOAA’s hourly RAP analyses and the GFS beyond them, nine paths at each of three heights.

MILE7
ON THE NETWORK

Around Groton on the Forecast Network

Neighboring plates

Southampton NY · 37 MI 37 miles southwest Manchester CT · 39 MI 39 miles northwest Brookhaven NY · 57 MI 57 miles southwest Boston MA · 88 MI 88 miles northeast Hempstead NY · 94 MI 94 miles southwest New York NY · 108 MI 108 miles southwest
FORECASTCITY
Atlas plate of Groton, Connecticut. Explore the plate
CONNECTICUT · SOUTHEASTERN CONNECTICUT

Groton

10,160 people, 40 ft above sea level in Southeastern Connecticut Planning Region.

40 ftElevation
10,160People
3 sq miLand
Sunny 67°
SunnyDew point 58°
1

Today in Groton

NEXT 15 HOURS
Now mostly cloudy day 67° 0%
7p mostly cloudy night 64° 1%
10p partly cloudy night 61° 0%
1a mostly clear night 58° 0%
4a partly cloudy night 56° 0%
7a partly cloudy day 55° 0%
Rain
NEXT RAINFriday · 30%
→
Tue0%
Mostly cloudy Mostly cloudy
54
67
A
Wed0%
Partly cloudy Partly cloudy
58
70
A
Thu0%
Partly cloudy Partly cloudy
63
73
A
Fri30%
Chance of showers Chance of showers
59
76
A
Sat10%
Partly cloudy Partly cloudy
49
69
B
Sun40%
Chance of showers Chance of showers
50
64
B
Mon20%
Mostly sunny Mostly sunny
44
64
C
Letters show how sure the forecast is: A, models agree; B, some spread; C, check back. Sample data.
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