Live Weather & Forecast

Weather in Groton

Connecticut, United States · Real-time conditions & 3-day outlook

Flag of United States
Clear
12°C
Feels like 10°C
53°F / Feels 51°F
Clear
Groton, Connecticut
🌙 Nighttime
Updated: 2026-04-11 21:00
💧
Humidity
35%
💨
Wind
12.2 km/h NNW
🌬️
Wind Gust
25.7 km/h
🌡️
Pressure
1025 mb
👁️
Visibility
16 km
☀️
UV Index
0 (Low)
🌧️
Precipitation
0 mm
☁️
Cloud Cover
0%
💦
Dew Point
-2.6°C
🌐
Wind Degree
333°

Air Quality Index

US EPA: Good UK DEFRA: Low (1)
CO
193.9 μg/m³
NO₂
9.1 μg/m³
O₃
75 μg/m³
SO₂
2 μg/m³
PM 2.5
5.2 μg/m³
PM 10
5.4 μg/m³

Weather Alerts 3

Met · Moderate · Expected
Special Weather Statement issued April 11 at 4:31AM EDT by NWS Upton NY

There is an elevated risk for fire spread today across southern Connecticut. Northwest winds will gust to 25 to 30 mph while relative humidity falls to 25 to 30 percent. These conditions, along with continued drying of fine fuels, could support the rapid spread of any fires that ignite, which could quickly become difficult to control. Conditions should improve this evening as winds diminish and re...

Met · Minor · Expected
Frost Advisory issued April 11 at 1:23PM EDT until April 12 at 9:00AM EDT by NWS Upton NY

* WHAT...Temperatures as low as 33 will result in frost formation. * WHERE...In Connecticut, Southern Middlesex and Southern New London Counties. In New Jersey, Western Bergen and Western Passaic Counties. In New York, Northeast Suffolk, Northern Westchester, Rockland, and Southeast Suffolk Counties. * WHEN...From midnight tonight to 9 AM EDT Sunday. * IMPACTS...Frost could harm sensitive outdo...

Take steps now to protect tender plants from the cold.

Met · Moderate · Expected
Special Weather Statement issued April 11 at 3:02AM EDT by NWS Boston/Norton MA

..ELEVATED FIRE WEATHER POTENTIAL TODAY IN SOUTHERN NEW ENGLAND... The combination of northwest winds gusting up to 30 mph, relative humidity as low as 20 to 30 percent, and a lack of significant rainfall over the past few days will lead to an elevated fire weather potential today.

Today's Hourly Forecast

24-hour breakdown for Groton, Connecticut

12 AM
Clear
Clear
💧 90% 💨 20.9 km/h
1 AM
Clear
Clear
💧 89% 💨 22.3 km/h
2 AM
Clear
Clear
💧 89% 💨 22 km/h
3 AM
Clear
Clear
💧 85% 💨 16.6 km/h
4 AM
Patchy rain nearby
Patchy rain nearby
💧 84% 💨 14.8 km/h 🌧️ 80%
5 AM
Clear
Clear
💧 83% 💨 11.9 km/h
6 AM
Clear
Clear
💧 81% 💨 14 km/h
7 AM
Sunny
Sunny
💧 83% 💨 18.4 km/h
8 AM
Sunny
10°
Sunny
💧 76% 💨 24.1 km/h
9 AM
Sunny
11°
Sunny
💧 73% 💨 25.9 km/h
10 AM
Sunny
14°
Sunny
💧 58% 💨 27 km/h
11 AM
Sunny
15°
Sunny
💧 48% 💨 24.5 km/h
12 PM
Sunny
17°
Sunny
💧 40% 💨 24.5 km/h
1 PM
Sunny
18°
Sunny
💧 32% 💨 22.7 km/h
2 PM
Sunny
18°
Sunny
💧 31% 💨 20.2 km/h
3 PM
Sunny
18°
Sunny
💧 34% 💨 19.1 km/h
4 PM
Sunny
18°
Sunny
💧 33% 💨 19.8 km/h
5 PM
Sunny
18°
Sunny
💧 33% 💨 19.1 km/h
6 PM
Sunny
16°
Sunny
💧 34% 💨 17.6 km/h
7 PM
Sunny
14°
Sunny
💧 36% 💨 15.8 km/h
8 PM
Clear
11°
Clear
💧 40% 💨 12.6 km/h
9 PM
Clear
12°
Clear
💧 35% 💨 12.2 km/h
10 PM
Clear
Clear
💧 46% 💨 11.9 km/h
11 PM
Clear
Clear
💧 49% 💨 11.5 km/h

3-Day Forecast

Daily overview for Groton, Connecticut

Today
Sunny
Sunny
19° /
🌧️ 0% chance of rain
💧 Avg. humidity: 58%
💨 Max wind: 27 km/h
🌧️ Total precip: 0.04 mm
☀️ UV Index: 6
🌅 Sunrise: 06:15 AM
🌇 Sunset: 07:25 PM
🌙 Waning Crescent
🌑 Moon: 42% lit
Sun, Apr 12
Patchy rain nearby
Patchy rain nearby
13° /
🌧️ 52% chance of rain
💧 Avg. humidity: 57%
💨 Max wind: 19.4 km/h
🌧️ Total precip: 0.17 mm
☀️ UV Index: 6
🌅 Sunrise: 06:13 AM
🌇 Sunset: 07:26 PM
🌙 Waning Crescent
🌑 Moon: 33% lit
Mon, Apr 13
Overcast
Overcast
13° /
🌧️ 0% chance of rain
💧 Avg. humidity: 88%
💨 Max wind: 29.5 km/h
🌧️ Total precip: 0 mm
☀️ UV Index: 5
🌅 Sunrise: 06:12 AM
🌇 Sunset: 07:27 PM
🌙 Waning Crescent
🌑 Moon: 23% lit

Best Time to Visit Groton

Plan your trip to Groton, United States around the most favorable weather conditions.

Peak Season
June – September
Warm, dry summers — ideal for outdoor activities.
Shoulder Season
April – May, October
Fewer crowds, moderate prices, mild weather.
Off Season
November – March
Cooler temperatures; some regions may experience rain or snow.
← Back to Groton 🗓 View Holidays 2026

Frequently Asked Questions

People also ask — answers optimized for search engines and voice queries.

What is the current weather in Groton?
Current conditions in Groton: Clear, temperature 12°C, humidity 35%.
What is the best time to visit Groton?
The best time to visit Groton is typically June – September. Warm, dry summers — ideal for outdoor activities.
What is the climate like in Groton?
Groton is located at approximately 41.4° latitude. It has a temperate climate with warm summers and cold winters.
Does it rain a lot in Groton?
The wettest period in Groton is typically during November – March. Cooler temperatures; some regions may experience rain or snow.
What should I pack for a trip to Groton?
For visits to Groton during June – September: light clothing and sun protection. For November – March: layers and a waterproof jacket are recommended.
What country is Groton in?
Groton is located in United States, in the state of Connecticut.
What are the public holidays in Groton in 2026?
View the 2026 public holidays for Groton on our Holidays page.
What are the GPS coordinates used for the weather forecast in Groton?
The weather forecast for Groton uses coordinates 41.3502, -72.0762.