Compiled and reviewed by the Trip.ovh planning team at COD Solutions Oy · Last reviewed Apr 17, 2026 · Editorial standards
Drive Time
31m
Distance
15 mi
24 km
Drive Score
6/10
Good drive
Same Day?
Yes, doable
Fuel Cost
$2
one way
EV Charging
Unknown
Estimated drive times based on typical traffic patterns. Actual times may vary with weather, construction, and real-time conditions.
Islip, NY
Wikimedia Commons
Fair Harbor, NY
Clément Proust
This quick 15-mile trip from Islip, NY to Fair Harbor, NY will take you about 31 minutes, making it a perfect day trip. You'll primarily navigate using Robert Moses Causeway and Montauk Highway, with a short stint on Main Street. With only a 14% highway share, expect a more local driving experience rather than a high-speed interstate journey. The estimated fuel cost is a budget-friendly $2, so you won't need to worry much about that. This drive stays within the Northeast region and is entirely within New York, offering a straightforward local exploration.
Weekend Trip
Doable as a same-day drive at 31m. Total distance: 15 miles.
Family Friendly
Moderate complexity with 0 natural rest stops along the way.
Solo Traveler
31m drive, comfortable solo distance.
EV Driver
0 DC fast chargers along the route. Coverage: unknown.
First-Time Driver
Mostly highway driving (14%). Straightforward navigation.
Scenic Drive
Turn-heavy local drive route profile.
This is a turn-heavy local drive, not a long stretch of highway. While 14% of the route is on highways, the majority involves navigating local roads. The longest uninterrupted stretch you'll encounter is 5.4 miles on Robert Moses Causeway. As you progress, expect the road to change from more open causeway driving to navigating through local streets. This route feels more like a series of connected local journeys than a continuous flow.
Expect a hands-on drive with frequent turns and local roads rather than long highway stretches. Navigation is very simple - set it and forget it for most of the drive. The trickiest moment comes around 5 miles in.
Very easy - short and simple to drive
Balances navigation complexity with total wheel time.
The drive from Islip, NY to Fair Harbor, NY is easy. At 31m with 14% highway, most drivers will find it relaxed and low-stress.
Where does it get tricky?
The main spots that need attention: at 5 miles: Navigation decision point; at 5.2 miles (RM / Robert Moses Causeway): Merge point - match speed before joining; at 10.5 miles (Robert Moses State Parkway): Roundabout - know your exit number before entering. Multiple destination signs - pick the right one.
These are the spots where you need to pay the most attention. Preview them before you drive.
Take the ramp toward RM South: Ocean Beaches
Navigation decision point
Merge onto RM / Robert Moses Causeway
Merge point - match speed before joining
Enter roundabout onto Robert Moses State Parkway toward Fields 4-5, Lighthouse USCG
Roundabout - know your exit number before entering. Multiple destination signs - pick the right one
Straight onto Robert Moses State Parkway toward Fields 4-5, Lighthouse USCG
Multiple destination signs - pick the right one
Turn right
Navigation decision point
Based on OSRM destination-sign hints, not a full list of every settlement the road passes.
Between Islip, NY and Fair Harbor, NY, road signs point toward Rm South: Ocean Beaches, Fields 4-5 and Lighthouse Uscg.
Rm South: Ocean Beaches
Fields 4-5
Lighthouse Uscg
| Road | Distance | Duration |
|---|---|---|
| Robert Moses Causeway | 5.4 mi | 9m |
| Main Street | 2.5 mi | 4m |
| Montauk Highway | 2.4 mi | 3m |
| Robert Moses State Parkway | 2.1 mi | 4m |
| Lighthouse Road | 0.6 mi | 2m |
| Cedar Court | 0.4 mi | 1m |
| Central Walk | 0.2 mi | <1m |
Step-by-step road directions between Islip, NY and Fair Harbor, NY.
Start on NY 27A
Continue on Montauk Highway
Continue on NY 27A
Continue on NY 27A
Take the ramp
Merge onto RM
Continue on RM
Enter roundabout onto Robert Moses State Parkway
Continue on Robert Moses State Parkway
Turn straight
Turn right
Continue on this road
Continue on Cedar Court
Continue on Lighthouse Road
Continue on Central Walk
Arrive at destination
Regular Gas
$2.47 one way
$4.94 round trip
| Fuel Type | $/gal | One Way | Round Trip |
|---|---|---|---|
| midgrade | $4.52 | $2.67 | $5.34 |
| premium | $4.92 | $2.91 | $5.81 |
| diesel | $5.61 | $3.31 | $6.62 |
No toll roads detected on this route.
Drive Cost (one way)
Fuel
$2
Estimated CO2 emission: 5.2 kg one way. Prices: EIA weekly data, 2026-04-13.
Driving Electric?
About $2 in charging · 0 stops · 60% less CO2
| Vehicle Type | kWh | Stops | DC Fast | Home Charge |
|---|---|---|---|---|
| Average EV | 4.5 | 0 | $1.58 | $0.72 |
| Efficient EV | 3.8 | 0 | $1.31 | $0.60 |
| EV Truck/SUV | 6 | 0 | $2.10 | $0.96 |
Gas CO2
5 kg
EV CO2
2 kg (60% 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.
Current conditions at both ends of the drive.
Origin
Morning in Islip on Friday
Local time
8:43 AM
EDT
Current temp
78°F
Mostly Sunny
Destination
Morning in Fair Harbor on Friday
Local time
8:43 AM
EDT
Current temp
46°F
Unavailable
Time zone
Origin and destination are on the same clock, so arrival timing is easier to judge at a glance.
Temperature spread
A meaningful temperature swing is a good cue to rethink layers, water, and how soon you want to arrive.
Road read
The weather snapshot is not static. If you are leaving later, give both cities one more quick forecast check before departure.
Weather data from the National Weather Service. Conditions may change; check closer to your travel date.
Compiled and maintained by the Trip.ovh planning team at COD Solutions Oy (Helsinki). Each route is built from authoritative open government and mapping datasets rather than crowdsourced reviews. Distances and geometry come from OSRM over OpenStreetMap. Fuel cost uses EIA weekly regional averages. Pages are published only after passing our data-quality checks; our methodology page documents refresh cadence, editorial standards, and known limitations.
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