How far is Cohasset, MA from Somerville, MA?
The driving distance from Cohasset, MA to Somerville, MA is about 30.9 miles (49.8 km), with a travel time of about 00h 49m by car.
- The straight-line flight distance is about 18.1 miles (29.2 km).
- For a round trip, plan for roughly 01h 38m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 8:00 AM to 10:00 AM EDT.
Reverse, save, or send this route
This route works well as a day trip with time at the destination. Copy the route link, send it to another device, or print a clean version before you head out.
This route works well as a day trip with time at the destination.
Flight Distance
Driving Distance
Gas Cost Calculator
Leave and Arrive Planner
Pick a departure time to see your estimated arrival and same-day return window.
Drive time stays fixed at 00h 49m.
A morning start gives you useful time at the destination and keeps the return out of the late evening.
You are leaving earlier than the recommended window, which gives you extra margin for breaks and traffic.
Halfway Point
A useful midpoint for breaks, coffee, or meeting in the middle.
A city in Norfolk County, Massachusetts.
Route Weather Snapshot
Check the forecast at both ends before you head out.
Partly Sunny
Partly Sunny
Driving Route Map
The map below follows the saved road route between Cohasset and Somerville.
Turn-by-Turn Driving Directions
Step-by-step road directions between Cohasset and Somerville.
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1
Start on North Main Street
1.5 mi · 3 min · North Main Street
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2
Turn left onto King Street
1309 ft · 30 sec · King Street
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3
Turn right onto Chief Justice Cushing Highway
1.3 km · 1 min · Chief Justice Cushing Highway
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4
Continue on Justice Cushing Way
1.9 mi · 3 min · Justice Cushing Way
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5
Enter the roundabout and take exit 2 toward Rotary Circle
108 m · 6 sec · Summer Street
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6
Exit the rotary onto Summer Street
861 ft · 17 sec · Summer Street
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7
Continue on Otis Street
3070 ft · 1 min · Otis Street
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8
Continue on Broad Cove Road
3134 ft · 55 sec · Broad Cove Road
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9
Continue on Lincoln Street
1.5 mi · 2 min · Lincoln Street
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10
Continue on Bridge Street
1.7 mi · 3 min · Bridge Street
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11
Continue on Fore River Bridge
1768 ft · 2 min · Fore River Bridge
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12
Continue on Washington Street
142 m · 8 sec · Washington Street
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13
Enter the roundabout and take exit 1 toward Washington Street
58 m · 3 sec · Washington Street
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14
Exit the roundabout onto Washington Street
1.6 mi · 3 min · Washington Street
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15
Continue on Hancock Street
1335 ft · 34 sec · Hancock Street
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16
Keep slight left to continue on Adams Street
1385 ft · 43 sec · Adams Street
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17
Turn right onto Newport Avenue
2.3 mi · 5 min · Newport Avenue
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18
Turn slight left onto Hancock Street
1349 ft · 33 sec · Hancock Street
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19
Continue on Neponset Avenue
1144 ft · 20 sec · Neponset Avenue
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20
Merge slight left onto William T. Morrissey Boulevard
75 m · 6 sec · William T. Morrissey Boulevard
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21
Take the exit straight toward I 93 North, US 1 North: Boston
1426 ft · 35 sec
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22
Merge slight left onto Southeast Expressway
3.3 mi · 4 min · Southeast Expressway
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23
Continue on John F. Fitzgerald Expressway
3.2 mi · 5 min · John F. Fitzgerald Expressway
-
24
Keep slight right to continue on I 93 North: Concord NH
3075 ft · 47 sec
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25
Take the exit slight right toward Sullivan Square, Somerville
2135 ft · 1 min
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26
Turn left onto Cambridge Street
1270 ft · 46 sec · Cambridge Street
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27
Continue on Washington Street
2455 ft · 1 min · Washington Street
-
28
Turn right onto McGrath Highway
1306 ft · 26 sec · McGrath Highway
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29
Turn left onto Medford Street
101 m · 12 sec · Medford Street
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30
Keep slight left to continue on Highland Avenue
2280 ft · 2 min · Highland Avenue
-
31
Turn right
50 m · 12 sec
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32
Arrive at your destination
0 m · 1 sec
Car Route Details
A richer read on the saved driving route between Cohasset and Somerville.
Turn-heavy local drive
The route has frequent decision points for its length, so lane choice and turn timing will matter more than cruising speed.
Southeast Expressway
Merge slight left onto Southeast Expressway
3.28 mi · 00h 04m
Route Summary
A quick read on whether this route feels easy, ambitious, or worth planning around.
A comfortable day-trip route
This route works well as a day trip. You can leave in the morning, spend meaningful time at the destination, and still return the same day.
Partly Sunny leaving Cohasset and Partly Sunny near Somerville.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Cohasset to Somerville?
The road trip is about 30.9 miles (49.8 km) and usually takes 00h 49m in normal driving conditions.
Is this a same-day trip or an overnight route?
This route works well as a day trip. You can leave in the morning, spend meaningful time at the destination, and still return the same day.
What is the halfway point on this route?
Quincy is a useful midpoint, sitting about 11.8 miles from Cohasset and 19.1 miles from Somerville.
How much longer is the road route than the straight-line distance?
The direct path is about 18.1 miles (29.2 km), while the road route adds roughly 12.8 extra miles because roads do not follow the straight air line.
When is the best time to leave for this route?
A good departure window is usually 8:00 AM to 10:00 AM EDT. If you want a more comfortable same-day return, try to leave by 4:52 PM EDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $4.24 one way or $8.48 round trip. Estimated CO2 is about 9.7 kg one way.
What should you check before leaving?
Before you leave, expect Partly Sunny around Cohasset and Partly Sunny near Somerville.
Stop Ideas Near Quincy
Useful break, food, and waypoint ideas within about 15 miles of the route midpoint.
Cocobeet - Boston
Boston's Old City Hall
Brockton City Hall
City Hall Plaza
Transit and Meeting Points
Useful pickup, handoff, or rendezvous points close to Quincy.
Back Bay station
South Station
Route 128 station
North Station
Flight Path Map
This map shows the direct air route between Cohasset and Somerville. Straight-line distance: 18.17 mi (29.24 km).
#1 Cohasset
City in Norfolk County, Massachusetts, United States of America
| Population | 8,529 |
| Coordinates | 42.2417700, -70.8036500 |
| Altitude | 6 |
| Country | United States |
#2 Somerville
A city in Middlesex County, Massachusetts.
| Population | 80,935 |
| Coordinates | 42.3876000, -71.0995000 |
| Altitude | 28 |
| Country | United States |
End: (-71.099387, 42.387558)
Estimated Travel Time
Distance: 50 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 01h 01m |
| 40 mph (64.37 km/h) | 00h 46m |
| 50 mph (80.47 km/h) | 00h 37m |
| 60 mph (96.56 km/h) | 00h 30m |
| 70 mph (112.65 km/h) | 00h 26m |
| 80 mph (129 km/h) | 00h 23m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.89 | $4.24 | $8.48 |
| Mid-grade | $4.40 | $4.79 | $9.59 |
| Premium | $4.80 | $5.23 | $10.46 |
| Diesel | $4.49 | $4.89 | $9.78 |
Assumes 8.3 L/100 km (about 28.3 MPG). CO2 is an estimate and varies by vehicle, fuel blend, traffic, and terrain.
Prices in Massachusetts · Apr 23, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.