Groton Travel Guide

City Connecticut town hosting Naval Submarine Base

Submarine construction and coastal navy life shape Groton: Electric Boat, the Submarine Force Museum with the USS Nautilus, and the Thames River docks. Travelers stop for naval history, clam shacks, boat tours into Long Island Sound, and quick access to Mystic’s seafaring museums.

Costs
Moderate: $110-220/day
Typical New England small-city prices; options range from budget to comfortable hotels.
Safety
Generally safe with local caution
Generally safe in residential areas; exercise routine city precautions around industrial zones.
Best Time
May-October (milder, waterfront activities)
Late spring to early fall is best for boating and nearby Mystic visits.
Local Time
9:38 AM
GMT-4
Weather
Overcast 46°F
Overcast
Population
9,221
Infrastructure & Convenience
Car-focused with ferry and commuter links to New London; clear signage for visitors.
Popularity
Attracts military families, maritime tourists, and visitors to nearby Mystic.
Known For
Naval Submarine Base New London, Submarine Force Museum, USS Nautilus, Electric Boat shipyard, Thames River, boat-building, maritime industry, proximity to Mystic Seaport, waterfront parks
Groton houses the Submarine Force Museum where the USS Nautilus, the world's first nuclear-powered submarine, is docked.

Why Visit Groton? #

Groton draws visitors with deep naval history and riverfront access that combine museum experiences and coastal charm. The Submarine Force Museum (home of the USS Nautilus) and an active Naval Submarine Base showcase undersea heritage, while boatyards and ferry links put Mystic Seaport and its maritime attractions within easy reach. Fresh seafood and waterfront promenades complement harbor views, and local festivals honor shipbuilding and seafaring traditions. It’s a practical stop for history-minded travelers and anyone curious about naval life.

Best Things to Do in Groton

All Attractions ›

Groton Bucket List

Don't Miss
  • Submarine Force Museum & USS Nautilus - Explore the Submarine Force Museum and tour USS Nautilus, pioneering nuclear submarine.
  • Fort Griswold Battlefield State Park - Walk Revolutionary War battlefield, climb Groton Monument, and view Thames River vistas.
  • Bluff Point State Park - Hike coastal trails at Bluff Point State Park, with beaches and harbor views.
Hidden Gems
  • Gungywamp Archaeological Site - Investigate prehistoric stone chambers and colonial-era ruins at Gungywamp, a quiet archaeological site.
  • Haley Farm State Park - Stroll fields and shoreline at Haley Farm, crossing salt marshes and historic farmland.
  • Noank Historic Village - Browse maritime history, galleries, and working boatyards in Noank's charming historic village.
Day Trips
  • Mystic Seaport Museum - Drive ten minutes to Mystic Seaport Museum, maritime exhibits and historic vessels.
  • New London and Ocean Beach Park - Cross the Thames to New London for waterfront dining and Ocean Beach Park.

Best Time to Visit Groton #

Visit Groton from late spring to early fall (May-September) for warm coastal weather, boating, and summer events. Winters bring cold, snow, and coastal storms, so plan indoor alternatives if traveling then.

Winter
December - February · -6°C to 4°C (21°F to 39°F)
Cold, snowy stretches with coastal storms and wind chills; downtown is quieter, museums open, but winter driving and ferry schedules can be disrupted.
Summer
June - August · 18°C to 28°C (64°F to 82°F)
Warm, humid days ideal for beaches, boat trips, and seafood dinners; expect crowds on holiday weekends and occasional afternoon thunderstorms.
Spring
March - May · 5°C to 18°C (41°F to 64°F)
Pleasant, variable weather as coastal waters warm; great for early-season sailing and avoiding peak crowds, but pack a rain jacket.

Best Time to Visit Groton #

Climate

Groton's climate is classified as Humid Subtropical - Humid Subtropical climate with warm summers (peaking in July) and freezing winters (coldest in January). Temperatures range from -7°C to 28°C. Abundant rainfall (1230 mm/year), wettest in November, distributed fairly evenly throughout the year.

Air Quality: AQI 23 Good
Best Time to Visit
JulyJuneAugust
Temperature & Rainfall
Temperature Range
38°
Warmest Month
-23°
Coldest Month
Monthly Conditions

January

January is the coldest month with highs of 3°C and lows of -7°C. Significant rainfall (107 mm) and partly cloudy skies.

43 Poor

Comfort

-2°
Feels Like Freezing
-2°C
Temperature
-7°
86%
Humidity
Very Humid

Weather

107 mm
Rainfall
5.2 m/s
Wind
Light Breeze
0.2
UV Index
Low
9.4h daylight

February

February is freezing with highs of 4°C and lows of -6°C. Regular rainfall (91 mm) and partly cloudy skies.

46 Poor

Comfort

-1°
Feels Like Freezing
-1°C
Temperature
-6°
84%
Humidity
Very Humid

Weather

91 mm
Rainfall
5.2 m/s
Wind
Light Breeze
0.4
UV Index
Low
10.5h daylight

March

March is cold with highs of 8°C and lows of -2°C. Significant rainfall (112 mm) and partly cloudy skies.

44 Poor

Comfort

Feels Like Cold
C
Temperature
-2°
82%
Humidity
Very Humid

Weather

112 mm
Rainfall
5.2 m/s
Wind
Light Breeze
0.7
UV Index
Moderate
11.8h daylight

April

April is cold with highs of 14°C and lows of 3°C. Significant rainfall (108 mm) and partly cloudy skies.

54 Acceptable

Comfort

Feels Like Cold
C
Temperature
14°
80%
Humidity
Very Humid

Weather

108 mm
Rainfall
4.9 m/s
Wind
Light Breeze
1.1
UV Index
High
13.2h daylight

May

May is cool with highs of 20°C and lows of 8°C. Regular rainfall (97 mm) and partly cloudy skies.

66 Good

Comfort

14°
Feels Like Cool
14°C
Temperature
20°
79%
Humidity
Very Humid

Weather

97 mm
Rainfall
4.4 m/s
Wind
Light Breeze
1.5
UV Index
High
14.4h daylight

June

June is mild with highs of 25°C and lows of 13°C. Regular rainfall (93 mm) and partly cloudy skies.

80 Excellent

Comfort

19°
Feels Like Mild
19°C
Temperature
13° 25°
80%
Humidity
Very Humid

Weather

93 mm
Rainfall
4.0 m/s
Wind
Light Breeze
1.7
UV Index
Very High
15.0h daylight

July

July is the warmest month with highs of 28°C and lows of 17°C. Regular rainfall (86 mm) and partly cloudy skies.

82 Excellent

Comfort

22°
Feels Like Mild
22°C
Temperature
17° 28°
77%
Humidity
Very Humid

Weather

86 mm
Rainfall
3.7 m/s
Wind
Light Breeze
1.8
UV Index
Very High
14.7h daylight

August

August is mild with highs of 27°C and lows of 17°C. Significant rainfall (105 mm) and partly cloudy skies.

80 Excellent

Comfort

22°
Feels Like Mild
22°C
Temperature
17° 27°
75%
Humidity
Very Humid

Weather

105 mm
Rainfall
3.7 m/s
Wind
Light Breeze
1.5
UV Index
Very High
13.7h daylight

September

September is mild with highs of 24°C and lows of 13°C. Significant rainfall (101 mm) and partly cloudy skies.

78 Very Good

Comfort

18°
Feels Like Mild
18°C
Temperature
13° 24°
76%
Humidity
Very Humid

Weather

101 mm
Rainfall
3.9 m/s
Wind
Light Breeze
1.1
UV Index
High
12.3h daylight

October

October is cool with highs of 18°C and lows of 6°C. Significant rainfall (101 mm) and partly cloudy skies.

68 Good

Comfort

12°
Feels Like Cool
12°C
Temperature
18°
78%
Humidity
Very Humid

Weather

101 mm
Rainfall
4.4 m/s
Wind
Light Breeze
0.6
UV Index
Moderate
11.0h daylight

November

November is cold with highs of 12°C and lows of 2°C. The wettest month with heavy rain (118 mm) and partly cloudy skies.

58 Acceptable

Comfort

Feels Like Cold
C
Temperature
12°
80%
Humidity
Very Humid

Weather

118 mm
Rainfall
4.8 m/s
Wind
Light Breeze
0.3
UV Index
Low
9.7h daylight

December

December is cold with highs of 6°C and lows of -3°C. Significant rainfall (111 mm) and partly cloudy skies.

44 Poor

Comfort

Feels Like Cold
C
Temperature
-3°
85%
Humidity
Very Humid

Weather

111 mm
Rainfall
5.0 m/s
Wind
Light Breeze
0.2
UV Index
Low
9.1h daylight

How to Get to Groton

By Air
By Train & Bus

How to Get Around Groton #

Groton’s neighborhoods are mixed: downtown and waterfront areas are walkable, but many attractions spread across town and a car is useful. Regional ferries and nearby rail/ferry connections from New London make access to the area straightforward for day trips. Local bus service exists but schedules can be limited outside peak commuter times; taxis cover short hops but rideshare availability varies.

Where to Stay in Groton #

Budget
Mid-Range
Luxury

Where to Eat in Groton #

Local Seafood & Clam Shacks
Fresh New England seafood defines Groton's dining scene - lobster rolls, clams, and walk-up shacks along the coast, plus Mystic's waterfront restaurants just across the river.
  • Abbott's Lobster in the Rough - Classic picnic-style lobster shack on waterfront.
  • Mystic Pizza - Famous, long-running pizza spot from the film.
  • Red 36 - Waterfront seafood and cocktails with harbor views.
Bakeries, Casual Eats & Market Finds
Beyond seafood, Groton and nearby Mystic have bakeries, casual pizzerias, and market stalls - easy for grab-and-go lunches, pastries, and relaxed seaside dining.
  • Sift Bakehouse - Artisan breads, pastries, and morning coffee.
  • Local Pizza & Casual Spots (Mystic area) - Casual, family-friendly nearby pizza joints.
  • Seaport-area Cafes & Stands - Casual cafes near the seaport and shops.

Breakdown of cuisine types found across Groton's restaurants and food venues, based on OpenStreetMap data.

Burger
Donut
Pizza
Coffee Shop
American
Seafood
Sandwich
Mexican
Ice Cream
Italian
Chicken
Asian
Chinese
Breakfast
Thai
Hot Dog
Tex Mex
Barbecue
Steak House
Mediterranean

Nightlife in Groton #

Nightlife within Groton is modest, with a few bars and casual restaurants; many residents cross to New London for a wider range of evening entertainment. Expect quieter evenings rather than a late-night scene.

Shopping in Groton #

Shopping in Groton is practical rather than boutique - local grocery stores, small retailers and strip malls handle everyday needs. For more varied shopping and nightlife head across the river to New London.

Nearby Cities #