Cape Air BOS ACK 9K5451
Cape Air · Live forecast
BOS → ACK
9K5451 · Mar 17, 2026 · 18:55 ED
75
Calm Score
"Mostly smooth — one short bumpy section you'll handle."
0h 55m
Duration
79 nm
Distance
25,000 ft
Cruise Altitude
HIGH
Confidence
Turbulence comfort along route
Comfort score combines turbulence probability with intensity — higher means rougher
Smooth Light Moderate Severe
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We know turbulence can feel scary — especially on long flights. This report is built for you: what bumps feel like, when they happen, and why you'll be completely safe. 1 in 3 passengers feel exactly like you.
Right now on your route
Live pilot reports from aircraft flying BOS → ACK
5 pilot reports along this route
2 / 5
Reporting smooth
1 / 5
Light turbulence
2
Moderate or worse
Latest pilot reports
Light
FIT UA /OV GDM/TM 0109/FL170/TP E145/TB OCNL LGT CHOP/RM DURD JFUND ARRIVAL
15m ago
Smooth
MHT UA /OV KMHT/TM 0106/FLDURGD/TP B190/SK OVC015/RM GAINS AND LOSSES 10KTS
18m ago
Smooth
PVD UA /OV PVD/TM 0104/FL190/TP E75S/TB INTMT LGT-MOD CHOP/RM DURD ROBUC ARRIVAL
20m ago
Smooth
BOS UA /OV KBOS/TM 0101/FL015/TP A321/RM BASES 1500
23m ago
Moderate
PVD UA /OV 8 WEST PVD/TM 0050/FL040/TP B757/TB MOD
34m ago
AI-powered flight briefing
300 data points analyzed · HIGH confidence
Your Flight

We analysed more than 300 data points along your route from Logan International, Boston to Nantucket Memorial, Nantucket.

Your Journey Beta

Your route takes you directly to your destination.

Mostly Smooth

Overall conditions look mostly smooth with occasional light bumps. Nothing to worry about.

Takeoff

Takeoff should feel smooth with possible light bumps, with calm conditions around the airport.

Winds Aloft

Winds at cruising altitude are about 119 knots.

Landing

Landing should feel smooth with possible light bumps with typical approach conditions.

You're in Safe Hands

If you feel nervous at any point, remember that turbulence is expected, safe, and part of normal flying. The crew is monitoring everything, and the aircraft is built to handle far more than anything you will feel. Have a safe and calm flight.

Relaxation Exercises
ZeroTurb Index (ZTI): Powered by our turbulence prediction algorithm combining atmospheric Richardson Number, wind shear analysis, temperature gradients, and geomagnetic activity. Learn more
Live data from ECMWF global forecast models · 12 atmospheric pressure levels · Updated every 6 hours
Flight Timeline 55 min
Maximum turbulence expected per segment
Takeoff
Light
0:15-0:40
Light
Landing
Smooth
Smooth
Light
Moderate
Severe
Longer bars indicate higher turbulence intensity. Values shown are the maximum for each time segment.
Airport conditions
Live weather at departure and arrival
BOS Logan International — Departure
Visibility
6 mi
Wind
15 kt G30 (250°)
Sky
Scattered
Temperature
16°C
Conditions
MVFR — Reduced visibility, minor delays possible
ACK Nantucket Memorial — Arrival
Visibility
3 mi
Wind
26 kt G44 (170°)
Sky
Overcast
Temperature
11°C
Your flight details
Departure timing and aircraft information
Evening Flight Departure
Time of day
Evening Flight
Tip
Evening and night flights typically offer smoother conditions as thermal activity subsides and the atmosphere stabilizes after sunset.
When
Today
Data sources & our approach
ZeroTurb's Custom Algorithm: Our proprietary ZeroTurb Index (ZTI) combines three meteorological indices weighted by their predictive accuracy — giving you transparent, passenger-focused turbulence probability instead of vague categories.

This forecast integrates data from:

Disclaimer: This forecast is for informational purposes only. Always consult official aviation weather sources and follow ATC guidance.