How far is Islip, NY from Rocky Point, NY?
The driving distance from Islip, NY to Rocky Point, NY is about 25.4 miles (40.8 km), with a travel time of about 00h 39m by car.
- The straight-line flight distance is about 21.4 miles (34.5 km).
- For a round trip, plan for roughly 01h 18m 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 39m.
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.
Village in Suffolk County, New York
Route Weather Snapshot
Check the forecast at both ends before you head out.
Mostly Sunny
Partly Sunny
Driving Route Map
The map below follows the saved road route between Islip and Rocky Point.
Turn-by-Turn Driving Directions
Step-by-step road directions between Islip and Rocky Point.
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1
Start on Main Street
865 ft · 22 sec · Main Street
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2
Turn left onto Islip Avenue
4 mi · 7 min · Islip Avenue
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3
Continue on Joshuas Path
1.4 mi · 2 min · Joshuas Path
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4
Continue on Wheeler Road
1.6 mi · 3 min · Wheeler Road
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5
Continue on Townline Road
530 ft · 17 sec · Townline Road
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6
Turn left onto Hauppauge Boulevard
1948 ft · 35 sec · Hauppauge Boulevard
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7
Turn slight right onto Nesconset-Port Jefferson Highway
1.3 mi · 2 min · Nesconset-Port Jefferson Highway
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8
Continue on Nesconset Highway
7.7 mi · 9 min · Nesconset Highway
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9
Continue on Nesconset-Port Jefferson Highway
2.3 mi · 3 min · Nesconset-Port Jefferson Highway
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10
Continue on Nesconset Highway
1138 ft · 22 sec · Nesconset Highway
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11
Continue on Route 25A EAST, Mount Sinai, Wading River
5.2 mi · 9 min
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12
Continue on Main Street
3036 ft · 1 min · Main Street
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13
Turn left onto Broadway
2051 ft · 1 min · Broadway
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14
Arrive at your destination
0 m · 1 sec · Broadway
Car Route Details
A richer read on the saved driving route between Islip and Rocky Point.
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.
Nesconset Highway
Continue on Nesconset Highway
7.71 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.
Mostly Sunny leaving Islip and Partly Sunny near Rocky Point.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Islip to Rocky Point?
The road trip is about 25.4 miles (40.8 km) and usually takes 00h 39m 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?
Lake Grove is a useful midpoint, sitting about 12.7 miles from Islip and 12.7 miles from Rocky Point.
How much longer is the road route than the straight-line distance?
The direct path is about 21.4 miles (34.5 km), while the road route adds roughly 4 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 7:12 PM EDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $3.61 one way or $7.22 round trip. Estimated CO2 is about 8 kg one way.
What should you check before leaving?
Before you leave, expect Mostly Sunny around Islip and Partly Sunny near Rocky Point.
Stop Ideas Near Lake Grove
Useful break, food, and waypoint ideas within about 15 miles of the route midpoint.
Transit and Meeting Points
Useful pickup, handoff, or rendezvous points close to Lake Grove.
Bridgeport
Stamford Transportation Center
Union Station
New Rochelle station
Flight Path Map
This map shows the direct air route between Islip and Rocky Point. Straight-line distance: 21.42 mi (34.47 km).
#1 Islip
This Long Island community is situated on the south shore of Suffolk County, New York, at an elevation of 13 feet.
| Population | 322,328 |
| Coordinates | 40.7298200, -73.2103900 |
| Altitude | 4 |
| Country | United States |
#2 Rocky Point
Town in Lake County, Montana, United States
| Population | 14,014 |
| Coordinates | 40.9526000, -72.9253800 |
| Altitude | 59 |
| Country | United States |
End: Rocky Point (-72.92538, 40.9526)
Estimated Travel Time
Distance: 41 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 00h 50m |
| 40 mph (64.37 km/h) | 00h 38m |
| 50 mph (80.47 km/h) | 00h 30m |
| 60 mph (96.56 km/h) | 00h 25m |
| 70 mph (112.65 km/h) | 00h 21m |
| 80 mph (129 km/h) | 00h 18m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $4.01 | $3.61 | $7.22 |
| Mid-grade | $4.48 | $4.03 | $8.07 |
| Premium | $4.86 | $4.37 | $8.75 |
| Diesel | $4.69 | $4.22 | $8.45 |
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 York · 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.