How far is Seabrook, NH from Portsmouth, NH?
The driving distance from Seabrook, NH to Portsmouth, NH is about 16 miles (25.7 km), with a travel time of about 00h 18m by car.
- The straight-line flight distance is about 13.9 miles (22.3 km).
- For a round trip, plan for roughly 00h 37m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 7:00 AM to 7:00 PM EDT.
Reverse, save, or send this route
This is an easy same-day return drive. Copy the route link, send it to another device, or print a clean version before you head out.
This is an easy same-day return drive.
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 18m.
This is a short drive, so your comfort window is wide. Traffic and current weather matter more than the clock.
This departure sits inside the recommended comfort window for the route.
Halfway Point
A useful midpoint for breaks, coffee, or meeting in the middle.
County seat of Hampshire County, Massachusetts, United States
Route Weather Snapshot
Check the forecast at both ends before you head out.
Sunny
Mostly Sunny
Driving Route Map
The map below follows the saved road route between Seabrook and Portsmouth.
Turn-by-Turn Driving Directions
Step-by-step road directions between Seabrook and Portsmouth.
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1
Start on the route
21 m · 7 sec
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2
Turn left onto Lafayette Road
585 ft · 20 sec · Lafayette Road
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3
Turn right
1560 ft · 31 sec
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4
Take the ramp slight right toward I 95 North: Hampton, Portsmouth
1387 ft · 34 sec
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5
Merge slight left onto Blue Star Turnpike
4.3 mi · 5 min · Blue Star Turnpike
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6
Keep slight left to continue on Blue Star Turnpike
7.8 mi · 9 min · Blue Star Turnpike
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7
Keep slight right to continue on Blue Star Turnpike
1.9 mi · 3 min · Blue Star Turnpike
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8
Take the exit slight right
1313 ft · 35 sec
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9
Turn right onto Market Street
1 mi · 3 min · Market Street
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10
At the end of the road, turn right onto Congress Street
16 m · 1 sec · Congress Street
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11
Arrive at your destination
0 m · 1 sec · Congress Street
Car Route Details
A richer read on the saved driving route between Seabrook and Portsmouth.
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.
Blue Star Turnpike
Keep slight left to continue on Blue Star Turnpike
7.83 mi · 00h 09m
Route Summary
A quick read on whether this route feels easy, ambitious, or worth planning around.
A short regional drive
This route is short enough to handle as a quick errand, commute, or easy same-day return without much planning overhead.
Sunny leaving Seabrook and Mostly Sunny near Portsmouth.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Seabrook to Portsmouth?
The road trip is about 16 miles (25.7 km) and usually takes 00h 18m in normal driving conditions.
Is this a same-day trip or an overnight route?
This route is short enough to handle as a quick errand, commute, or easy same-day return without much planning overhead.
What is the halfway point on this route?
North Hampton is a useful midpoint, sitting about 8 miles from Seabrook and 8 miles from Portsmouth.
How much longer is the road route than the straight-line distance?
The direct path is about 13.9 miles (22.3 km), while the road route adds roughly 2.1 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 7:00 AM to 7:00 PM EDT. If you want a more comfortable same-day return, try to leave by 7:52 PM EDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $2.40 one way or $4.81 round trip. Estimated CO2 is about 5 kg one way.
What should you check before leaving?
Before you leave, expect Sunny around Seabrook and Mostly Sunny near Portsmouth.
Stop Ideas Near North Hampton
Useful break, food, and waypoint ideas within about 15 miles of the route midpoint.
Old City Hall
Dover City Hall
Transit and Meeting Points
Useful pickup, handoff, or rendezvous points close to North Hampton.
Exeter station
Portsmouth, New Hampshire
Newburyport, Massachusetts
Durham–UNH station
Flight Path Map
This map shows the direct air route between Seabrook and Portsmouth. Straight-line distance: 13.84 mi (22.27 km).
#1 Seabrook
Town in New Hampshire, United States
| Population | 8,844 |
| Coordinates | 42.8948100, -70.8711600 |
| Altitude | 15 |
| Country | United States |
#2 Portsmouth
City in Rockingham County, New Hampshire, United States
| Population | 21,557 |
| Coordinates | 43.0770400, -70.7576600 |
| Altitude | 6 |
| Country | United States |
End: Congress Street (-70.757617, 43.077054)
Estimated Travel Time
Distance: 26 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 00h 31m |
| 40 mph (64.37 km/h) | 00h 23m |
| 50 mph (80.47 km/h) | 00h 19m |
| 60 mph (96.56 km/h) | 00h 15m |
| 70 mph (112.65 km/h) | 00h 13m |
| 80 mph (129 km/h) | 00h 11m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $4.29 | $2.40 | $4.81 |
| Mid-grade | $4.88 | $2.74 | $5.47 |
| Premium | $5.34 | $2.99 | $5.98 |
| Diesel | $6.35 | $3.56 | $7.11 |
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 New Hampshire · Oct 15, 2026