Origin
Boston, MA
Morning in Boston on Tuesday
Local time
6:57 AM
EDT
Current temp
60°F
Unavailable
Live forecast
Trip from Boston, MA to Cohasset, MA
Pin this tripCompiled and reviewed by the US Trip Planner planning team at COD Solutions Oy · Last reviewed Apr 21, 2026 · Editorial standards
Drive Time
37m
Distance
20.3 mi
33 km
Drive Score
7/10
Good drive
Same Day?
Yes, doable
Fuel Cost
$3
one way
EV Charging
Unknown
Best Time to Leave
4 AM
0h 34m
★
6 AM
0h 38m
8 AM
0h 44m
10 AM
0h 40m
12 PM
0h 39m
3 PM
0h 40m
5 PM
0h 44m
8 PM
0h 36m
Estimated drive times based on typical traffic patterns. Actual times may vary with weather, construction, and real-time conditions.
Boston, MA
Wikimedia Commons
Trip Overview
If you are looking to escape Boston for the coast, the 20.3-mile trip to Cohasset is a quick and manageable excursion. Expect a driving time of approximately 37 minutes, making this an ideal day trip that requires no overnight stay. You will navigate through the Northeast region using a combination of the Southeast Expressway, Newport Avenue Extension, and North Main Street. With fuel costs estimated at just $3, it is an incredibly budget-friendly outing for a short getaway. Because the journey is brief and straightforward, you have plenty of flexibility to plan your departure around your own schedule.
Main Roads
| Road | Distance | Duration |
|---|---|---|
| Southeast Expressway | 3.8 mi | 5m |
| Newport Avenue Extension | 2.3 mi | 5m |
| North Main Street | 2.1 mi | 3m |
| Washington Street | 1.7 mi | 2m |
| Bridge Street | 1.7 mi | 2m |
| Lincoln Street | 1.5 mi | 2m |
| Justice Cushing Way | 1.2 mi | 1m |
| John F. Fitzgerald Expressway | 1.2 mi | 2m |
Longest stretch:
Southeast Expressway
— 3.8 mi, about 5m
Turn-by-Turn Driving Directions
Step-by-step road directions between Boston, MA and Cohasset, MA.
1
Start on Tremont Street
230 ft
·
16 sec
·
Tremont Street
2
Turn left onto School Street
0.1 mi
·
25 sec
·
School Street
Use the left lane.
3
At end of road, turn left onto Washington Street
110 ft
·
4 sec
·
Washington Street
4
Turn right onto Water Street
210 ft
·
11 sec
·
Water Street
5
Turn right onto Devonshire Street
0.2 mi
·
36 sec
·
Devonshire Street
6
Continue on Otis Street
485 ft
·
18 sec
·
Otis Street
7
Continue on Kingston Street
0.1 mi
·
31 sec
·
Kingston Street
8
Turn left onto Essex Street
244 ft
·
8 sec
·
Essex Street
9
Turn slight right
86 ft
·
5 sec
10
Take the ramp
0.2 mi
·
24 sec
Toward I 93 South: Quincy
11
Merge onto I 93; US 1; MA 3
1.2 mi
·
2 min
·
John F. Fitzgerald Expressway
Use the straight / slight right lanes.
12
Continue on I 93; US 1; MA 3
3.8 mi
·
5 min
·
Southeast Expressway
13
Take the exit onto MA 3A
0.2 mi
·
39 sec
·
MA 3A
Exit 12
Toward MA 3A South: Neponset, Quincy
Use the slight right lane.
14
Merge onto MA 3A
0.1 mi
·
8 sec
·
Gallivan Boulevard
15
Take the exit onto MA 3A
0.3 mi
·
32 sec
·
MA 3A
16
Keep slight right at fork onto MA 3A
0.2 mi
·
25 sec
·
Hancock Street
Use the slight right lane.
17
Turn slight right onto Newport Avenue Extension
2.3 mi
·
5 min
·
Newport Avenue Extension
Use the right lane.
18
Turn left onto Adams Street
0.3 mi
·
41 sec
·
Adams Street
19
Turn straight onto Hancock Street
0.3 mi
·
33 sec
·
Hancock Street
20
Continue on Washington Street
1.6 mi
·
2 min
·
Washington Street
Use the straight lane.
21
Enter roundabout onto MA 3A
220 ft
·
3 sec
·
Washington Street
22
Continue on MA 3A
451 ft
·
7 sec
·
Washington Street
23
Continue on MA 3A
0.3 mi
·
1 min
·
Fore River Bridge
24
Continue on MA 3A
1.7 mi
·
2 min
·
Bridge Street
25
Continue on MA 3A
1.5 mi
·
2 min
·
Lincoln Street
26
Continue on MA 3A
0.6 mi
·
55 sec
·
Broad Cove Road
27
Continue on MA 3A
0.6 mi
·
1 min
·
Otis Street
28
Continue on MA 3A
0.2 mi
·
14 sec
·
Summer Street
29
Enter roundabout onto MA 3A
134 ft
·
2 sec
·
Justice Cushing Way
30
Continue on MA 3A
1.2 mi
·
1 min
·
Justice Cushing Way
31
Turn left onto MA 228
0.4 mi
·
37 sec
·
East Street
Use the left lane.
32
Continue on East Street
0.5 mi
·
58 sec
·
East Street
33
Continue on North Main Street
2.1 mi
·
3 min
·
North Main Street
34
Arrive at destination
North Main Street
Heads-up: tricky spots
5 of 165 decision points cluster between mile 0 and 6.4 — GPS handles the exact turns, but know they're coming. Your lane choice matters more than the turn itself.
7
0 mi into trip
|
~0m in
|
School Street
Turn left onto School Street
Lane positioning matters here
Use the left lane.
5
0.2 mi into trip
|
~0m in
|
Washington Street
At end of road, turn left onto Washington Street
Navigation decision point
5
0.2 mi into trip
|
~0m in
|
Devonshire Street
Turn right onto Devonshire Street
Navigation decision point
8
5.8 mi into trip
|
~10m in
|
MA 3A
Take the exit onto MA 3A toward MA 3A South: Neponset, Quincy
Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one
Use the slight right lane.
Exit 12
Toward MA 3A South: Neponset, Quincy
7
6.4 mi into trip
|
~11m in
|
MA 3A / Hancock Street
Keep slight right at fork onto MA 3A / Hancock Street
Highway fork - watch signs carefully. Lane positioning matters here
Use the slight right lane.
Fuel & Cost
Regular Gas
$3.25 one way
$6.50 round trip
$4.07/gal
25.4 MPG avg
7 kg CO2
| Fuel Type | $/gal | One Way | Round Trip |
|---|---|---|---|
| midgrade | $4.43 | $3.54 | $7.09 |
| premium | $4.82 | $3.85 | $7.71 |
| diesel | $5.61 | $4.48 | $8.96 |
No toll roads detected on this route.
Drive Cost (one way)
Fuel
$3
Estimated CO2 emission: 7.1 kg one way. Prices: EIA weekly data, 2026-04-13.
Driving Electric?
About $2 in charging · 0 stops · 71% less CO2
| Vehicle Type | kWh | Stops | DC Fast | Home Charge |
|---|---|---|---|---|
| Average EV | 6.1 | 0 | $2.13 | $0.97 |
| Efficient EV | 5.1 | 0 | $1.78 | $0.81 |
| EV Truck/SUV | 8.1 | 0 | $2.84 | $1.30 |
Gas CO2
7 kg
EV CO2
2 kg (71% less)
This trip is well within single-charge range for most EVs. No charging stops needed if you start fully charged.
DC fast charging avg $0.35/kWh. Home charging avg $0.16/kWh. US grid CO2: 0.39 kg/kWh.
Travel Intel
Current conditions at both ends of the drive.
Destination
Cohasset, MA
Morning in Cohasset on Tuesday
Local time
6:57 AM
EDT
Current temp
58°F
Unavailable
Live forecast
Time zone
Same local time
Origin and destination are on the same clock, so arrival timing is easier to judge at a glance.
Temperature spread
2 degrees cooler at arrival
A meaningful temperature swing is a good cue to rethink layers, water, and how soon you want to arrive.
Road read
37m on the road
Use the two city cards together: check the sky where you start, then compare it with the local time and temperature at arrival.
Weather data from the National Weather Service. Conditions may change; check closer to your travel date.
What kind of drive is this?
Expect a turn-heavy local drive that demands your attention rather than a monotonous interstate cruise. While 25% of the route consists of highway driving, the majority of your time is spent navigating smaller local roads. The longest uninterrupted stretch you will encounter is a 3.8-mile segment on the Southeast Expressway before transitioning into more technical driving. This shift creates a distinct contrast between the initial fast-paced highway section and the slower, more deliberate pace of the final approach. You will find that the road's personality changes significantly as you leave the major expressway behind.
Only 25% highway — the rest is turn-by-turn surface driving.
34 navigation steps total — most of the decisions cluster near the start and finish.
Longest single stretch: 3.8 mi on Southeast Expressway.
How Hard Is This Drive?
8/10
Expect a hands-on drive with frequent turns and local roads rather than long highway stretches. This route has several spots where lane changes, forks, or exits need your full attention. The trickiest moment comes early in the drive near School Street.
Driving Effort
8/10
Focused - busy navigation packed into a short drive
Balances navigation complexity with total wheel time.
This is a short but busy drive. With 16 decision points packed into just 20.3 miles, you will need to pay attention to lane changes and exits — but the whole thing is over in 37m.
Where does it get tricky?
The main spots that need attention: near the start (School Street): Lane positioning matters here; at 0.2 miles (Washington Street): Navigation decision point; at 0.2 miles (Devonshire Street): Navigation decision point.
Towns Mentioned on Route Signs
Based on OSRM destination-sign hints, not a full list of every settlement the road passes.
Towns Mentioned on Route Signs
Based on OSRM destination-sign hints, not a full list of every settlement the road passes.
On the drive from Boston, MA to Cohasset, MA, road signs begin pointing toward Quincy along the way.
Quincy
5.8 mi in
|
~10m
|
via MA 3A
About the Cities
Starting in Boston, MA
Full guide →A city of history and tradition, Boston offers a proud legacy of culture, education, and numerous sporting championships. The "shining city on a hill"s independent spirit has been displayed to the world ever since colonists were angry over a British tax on their beloved tea and dumped shiploads of it into the harbor in protest. In the early 1600s, the peninsula in Massachusetts that would become known as Boston was controlled by Native Americans until John Smith (English soldier, explorer, colonial governor, Admiral of New England, and author) named the area New England to attract European settlers. Boston was founded in 1630 by John Winthrop, making it one of the oldest cities in the U.S. No other American city has made more of an effort to preserve its history, and you'll find buildings that pre-date the republic dotted throughout the region.
City content from Wikivoyage (CC BY-SA 4.0) and Wikidata (CC0).
Who Is This Route For?
Weekend Trip
Doable as a same-day drive at 37m. Total distance: 20.3 miles.
Family Friendly
Moderate complexity with 0 natural rest stops along the way.
Solo Traveler
37m drive, comfortable solo distance.
EV Driver
0 DC fast chargers along the route. Coverage: unknown.
Scenic Drive
Mostly surface roads route profile with national parks nearby.
Frequently Asked Questions
The longest stretch is about 3.8 miles on Southeast Expressway. The full list of main roads is in the Roads section above.
It helps. This route has a higher-than-average number of complex decision points, which get harder in the dark. If the last hour of the trip is on surface roads or mountain grades, aim to arrive at Cohasset, MA before sunset when you can. Check the Trip Plan for departure windows that land you in daylight.
Yes. At under 2 hours behind the wheel, this works well for families — plan one quick stop if you have younger kids.
The main spots that need attention: near the start (School Street): Lane positioning matters here; at 0.2 miles (Washington Street): Navigation decision point; at 0.2 miles (Devonshire Street): Navigation decision point.
Yes — Adams National Historical Park, Boston National Historical Park and Boston Harbor Islands National Recreation Area (6 total within detour distance). See the National Parks section for detour distances and tips on detours.
Yes. A round trip is manageable in a single day if you plan a break at Cohasset, MA before heading back.
How this page is built
Compiled by the US Trip Planner planning team at COD Solutions Oy from open government datasets — OSRM over OpenStreetMap for geometry, EIA for fuel prices, and NPS for national parks. See our methodology for refresh cadence and limitations.
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