Origin
Seabrook, NH
Morning in Seabrook on Sunday
Local time
9:28 AM
EDT
Current temp
37°F
Unavailable
Live forecast
Trip from Seabrook, NH to Portsmouth, NH
Compiled and reviewed by the US Trip Planner planning team at COD Solutions Oy · Last reviewed Apr 19, 2026 · Editorial standards
Drive Time
21m
Distance
16 mi
26 km
Drive Score
6/10
Good drive
Same Day?
Yes, doable
Fuel Cost
$3
one way
EV Charging
Unknown
Best Time to Leave
4 AM
0h 20m
★
6 AM
0h 22m
8 AM
0h 25m
10 AM
0h 23m
12 PM
0h 22m
3 PM
0h 23m
5 PM
0h 25m
8 PM
0h 20m
★
Estimated drive times based on typical traffic patterns. Actual times may vary with weather, construction, and real-time conditions.
Seabrook, NH
Mohan Nannapaneni
Portsmouth, NH
Wikimedia Commons
Trip Overview
Seabrook, NH to Portsmouth, NH is 16 miles and takes about 21 minutes via Blue Star Turnpike and Market Street, with a fuel budget near $3 and enough daylight to finish in a day. This short trip stays entirely within New Hampshire, connecting two points in the Northeast region. Given its highway-focused profile and brief duration, this route is ideal for a quick transfer or a day trip extension. You'll spend most of your time on well-maintained roads, making for a straightforward journey.
Main Roads
| Road | Distance | Duration |
|---|---|---|
| Blue Star Turnpike | 14 mi | 16m |
| Market Street | 1 mi | 2m |
| NH 107 | 0.3 mi | <1m |
| Lafayette Road | 0.1 mi | <1m |
| Congress Street | <0.1 mi | <1m |
Longest stretch:
Blue Star Turnpike
— 14 mi, about 16m
Turn-by-Turn Driving Directions
Step-by-step road directions between Seabrook, NH and Portsmouth, NH.
1
Start on this road
68 ft
·
7 sec
·
this road
2
Turn left onto US 1
0.1 mi
·
20 sec
·
Lafayette Road
Use the straight / left lanes.
3
Turn right onto NH 107
0.3 mi
·
31 sec
·
NH 107
Use the right lane.
4
Take the ramp
0.3 mi
·
33 sec
Toward I 95 North: Hampton, Portsmouth
Use the slight right lane.
5
Merge onto I 95
4.3 mi
·
4 min
·
Blue Star Turnpike
6
Keep slight left at fork onto I 95
7.8 mi
·
9 min
·
Blue Star Turnpike
Use the slight left / straight lanes.
7
Keep slight right at fork onto I 95
1.9 mi
·
2 min
·
Blue Star Turnpike
Toward I 95 North: Portsmouth, New Hampshire, Maine Points
Use the straight / slight left lanes.
8
Take the exit
0.2 mi
·
35 sec
Exit 7
Use the slight right lane.
9
Turn right onto Market Street
1.0 mi
·
2 min
·
Market Street
Use the right lane.
10
At end of road, turn right onto US 1
52 ft
·
1 sec
·
Congress Street
11
Arrive at destination
US 1
Heads-up: tricky spots
5 of 95 decision points cluster between mile 0.1 and 14.7 — GPS handles the exact turns, but know they're coming. Your lane choice matters more than the turn itself.
6
0.1 mi into trip
|
~0m in
|
NH 107
Turn right onto NH 107
Lane positioning matters here
Use the right lane.
7
0.4 mi into trip
|
~0m in
Take the ramp toward I 95 North: Hampton, Portsmouth
Lane positioning matters here. Multiple destination signs - pick the right one
Use the slight right lane.
Toward I 95 North: Hampton, Portsmouth
6
4.9 mi into trip
|
~6m in
|
I 95 / Blue Star Turnpike
Keep slight left at fork onto I 95 / Blue Star Turnpike
Highway fork - watch signs carefully. Lane positioning matters here
Use the slight left / straight lanes.
8
12.8 mi into trip
|
~15m in
|
I 95 / Blue Star Turnpike
Keep slight right at fork onto I 95 / Blue Star Turnpike toward I 95 North: Portsmouth, New Hampshire, Maine Points
Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one
Use the straight / slight left lanes.
Toward I 95 North: Portsmouth, New Hampshire, M...
6
14.7 mi into trip
|
~18m in
Take the exit
Exit ramp - move to the correct lane early. Lane positioning matters here
Use the slight right lane.
Exit 7
Fuel & Cost
Regular Gas
$2.58 one way
$5.15 round trip
$4.09/gal
25.4 MPG avg
6 kg CO2
| Fuel Type | $/gal | One Way | Round Trip |
|---|---|---|---|
| midgrade | $4.50 | $2.83 | $5.67 |
| premium | $4.86 | $3.06 | $6.13 |
| diesel | $5.61 | $3.53 | $7.07 |
Estimated Tolls: $0.99
Blue Star Turnpike
(14 mi)
$0.99
Toll estimates based on average 2024-2025 rates. EZ-Pass/SunPass discounts may lower the actual cost.
Drive Cost (one way)
Fuel
$3
Tolls
$1
Total
$4
Estimated CO2 emission: 5.6 kg one way. Prices: EIA weekly data, 2026-04-13.
Driving Electric?
About $2 in charging · 0 stops · 67% less CO2
| Vehicle Type | kWh | Stops | DC Fast | Home Charge |
|---|---|---|---|---|
| Average EV | 4.8 | 0 | $1.68 | $0.77 |
| Efficient EV | 4 | 0 | $1.40 | $0.64 |
| EV Truck/SUV | 6.4 | 0 | $2.24 | $1.02 |
Gas CO2
6 kg
EV CO2
2 kg (67% 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
Portsmouth, NH
Morning in Portsmouth on Sunday
Local time
9:28 AM
EDT
Current temp
42°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
5 degrees warmer at arrival
A meaningful temperature swing is a good cue to rethink layers, water, and how soon you want to arrive.
Road read
21m 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?
This drive is predominantly highway, with 90% of the journey on high-speed roads like the Blue Star Turnpike. You'll experience a consistent, fast-paced drive for the most part, including one uninterrupted stretch of 14 miles on the Blue Star Turnpike. As you approach Portsmouth, the route transitions to more local roads like Market Street, offering a slight change in pace before you reach your destination. Expect a smooth and efficient experience behind the wheel.
90% highway — fuel and pacing are the main things to plan.
11 navigation steps total — most of the decisions cluster near the start and finish.
Longest single stretch: 14 mi on Blue Star Turnpike.
How Hard Is This Drive?
8/10
This is a straightforward highway drive that stays mostly on Blue Star Turnpike and Market Street. This route has several spots where lane changes, forks, or exits need your full attention. The trickiest moment comes around 0.1 miles in near NH 107.
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 9 decision points packed into just 16 miles, you will need to pay attention to lane changes and exits — but the whole thing is over in 21m.
Where does it get tricky?
The main spots that need attention: at 0.1 miles (NH 107): Lane positioning matters here; at 0.4 miles: Lane positioning matters here. Multiple destination signs - pick the right one; at 4.9 miles (I 95 / Blue Star Turnpike): Highway fork - watch signs carefully. Lane positioning matters here.
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.
Between Seabrook, NH and Portsmouth, NH, road signs point toward New Hampshire and Maine Points.
New Hampshire
12.8 mi in
|
~15m
|
via I 95
Maine Points
12.8 mi in
|
~15m
|
via I 95
Who Is This Route For?
Weekend Trip
Doable as a same-day drive at 21m. Total distance: 16 miles.
Family Friendly
Moderate complexity with 0 natural rest stops along the way.
Solo Traveler
21m drive, comfortable solo distance.
EV Driver
0 DC fast chargers along the route. Coverage: unknown.
First-Time Driver
Mostly highway driving (90%). Some complex stretches to watch for.
Frequently Asked Questions
The longest stretch is about 14 miles on Blue Star Turnpike. The full list of main roads is in the Roads section above.
Expect about $0.99 in tolls one way, starting with Blue Star Turnpike. Most Northeast and Midwest toll agencies accept E-ZPass; in the West and Texas, transponders like TxTag or FasTrak apply. If you do not have a transponder, cashless tolling plates will mail a bill to the vehicle's registered address — usually with a surcharge, so a rental-car toll pass is often cheaper than paying by mail.
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 Portsmouth, NH 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.
Mostly yes along the main roads, but rural stretches through NH can have sparse or no coverage. Before you leave, download offline Google Maps or Apple Maps for the route, and consider downloading music or podcasts instead of streaming. If you depend on data for navigation, keep a paper backup of the turn-by-turn directions.
The main spots that need attention: at 0.1 miles (NH 107): Lane positioning matters here; at 0.4 miles: Lane positioning matters here. Multiple destination signs - pick the right one; at 4.9 miles (I 95 / Blue Star Turnpike): Highway fork - watch signs carefully. Lane positioning matters here.
Yes. A round trip is manageable in a single day if you plan a break at Portsmouth, NH 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, and EIA for fuel prices. See our methodology for refresh cadence and limitations.
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