FallPeak season ~71°F highs

Things to do in Dennis in September

September is one of the best months to visit Dennis, with average highs around 71°F. Crisp air and changing leaves make parks and viewpoints shine.

Plan a September weekend Where else in September

Best picks for September

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

1Foliage walks

Cape Cod National Seashore

park

2Foliage walks

Monomoy National Wildlife Refuge

park

3Foliage walks

Nickerson State Park

Holidays in September 2027

Labour Day · Mon, Sep 6

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

Also great in September in Massachusetts

Boston Worcester New Bedford Springfield Pittsfield

Dennis in September: quick answers

Is September a good time to visit Dennis?

September is one of the best months to visit Dennis, with average highs around 71°F. Crisp air and changing leaves make parks and viewpoints shine.

What is the weather like in Dennis in September?

Average daytime highs are around 71°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 Dennis in September?

Top picks for September: Cape Cod National Seashore, Monomoy National Wildlife Refuge, Nickerson State Park, Scargo Tower, Eldredge Park.