FallGood time to go ~62°F highs

Things to do in Groton in October

October is a good month to visit Groton, with average highs around 62°F. Crisp air and changing leaves make parks and viewpoints shine.

Plan a October weekend Where else in October

Best picks for October

What's famous here, weighted toward what shines in October.

USS Nautilus

world's first nuclear-powered submarine

2Foliage walks

Connecticut College Arboretum

Private, Open To Public Without Fee

3Foliage walks

Gillette Castle State Park

Holidays in October 2026

Columbus Day · Mon, Oct 12

Expect busier roads and pricier stays around these dates. See long weekends.

What’s on in Groton in October

Concerts, games and shows in the next few weeks. Tickets open on Ticketmaster.

Thu, Oct 8 · 8:00 PMDalvin La MelodiaPremier Theater at Foxwoods Resort Casino Plan a weekend around it

Thu, Oct 8 · 9:30 PMLos Perreo Parties presents Noche de Bachata

Groton in October: quick answers

Is October a good time to visit Groton?

October is a good month to visit Groton, with average highs around 62°F. Crisp air and changing leaves make parks and viewpoints shine.

What is the weather like in Groton in October?

Average daytime highs are around 62°F, compared with 80°F in the warmest month. Check the forecast a week out; our planner favors indoor stops on rainy days.

What are the best things to do in Groton in October?

Top picks for October: USS Nautilus, Connecticut College Arboretum, Gillette Castle State Park, Hammonasset Beach State Park, Harkness Memorial State Park.