Nantucket ferry schedule & forecast
Updated at 8:12 PM ETSee the latest announcements from the Steamship Authority
No more departures today.
| Time | Vessel | Probability | Wind | Gusts | Waves | Dir |
|---|---|---|---|---|---|---|
| 6:10 AM | Hy-Line Fast | 99% | 11.8 mph | 15.7 mph | 1.6 ft | W |
| 6:30 AM | SSA Trad. | 99% | 11.8 mph | 15.7 mph | 1.6 ft | W |
| 8:15 AM | SSA Fast M/V Iyanough | 99% | 14.5 mph | 17.9 mph | 1.6 ft | W |
| 9:15 AM | SSA Trad. | 99% | 15.4 mph | 20.4 mph | 1.6 ft | WNW |
| 9:30 AM | Hy-Line Fast | 99% | 15.4 mph | 20.4 mph | 1.6 ft | WNW |
| 11:00 AM | SSA Fast M/V Iyanough | 99% | 16 mph | 22.6 mph | 1.8 ft | W |
| 11:20 AM | Hy-Line Fast | 99% | 16 mph | 22.6 mph | 1.8 ft | W |
| 12:00 PM | SSA Trad. | 99% | 15.7 mph | 23.7 mph | 2 ft | W |
| 12:45 PM | Hy-Line Fast | 99% | 15.7 mph | 23.7 mph | 2 ft | W |
| 2:00 PM | SSA Fast M/V Iyanough | 99% | 20.5 mph | 25.9 mph | 2.3 ft | W |
| 2:25 PM | Hy-Line Fast | 99% | 20.5 mph | 25.9 mph | 2.3 ft | W |
| 2:45 PM | SSA Trad. | 99% | 20.5 mph | 25.9 mph | 2.3 ft | W |
| 3:45 PM | Hy-Line Fast | 99% | 19.2 mph | 25.5 mph | 2.3 ft | W |
| 5:00 PM | SSA Fast M/V Iyanough | 99% | 16.5 mph | 23.3 mph | 2.4 ft | W |
| 5:30 PM | SSA Trad. | 99% | 16.5 mph | 23.3 mph | 2.4 ft | W |
| 5:40 PM | Hy-Line Fast | 99% | 16.5 mph | 23.3 mph | 2.4 ft | W |
| 6:45 PM | Hy-Line Fast | 99% | 15.5 mph | 21.9 mph | 2.3 ft | W |
| 7:30 PM | SSA Fast M/V Iyanough | 99% | 11.5 mph | 19.7 mph | 2.2 ft | W |
| 8:00 PM | SSA Trad. | 99% | 11.1 mph | 17.2 mph | 2.2 ft | W |
| 8:30 PM | Hy-Line Fast | 99% | 11.1 mph | 17.2 mph | 2.2 ft | W |
These probabilities are calibrated — the percentages reflect how often comparable trips historically ran under similar conditions. When the model shows an 80% chance of running, about 80% of comparable trips historically ran.
Tomorrow and beyond use the Open-Meteo marine forecast for each departure’s hour. Forecasts for days 1–3 are highly reliable; confidence decreases further out.
Model & Methodology
The model estimates whether each scheduled ferry will run based on current and forecasted marine conditions.
When the model shows an 80% chance of running, about 80% of comparable trips historically ran. The chances are calibrated, so they can be read directly.
Trained on 33,416 trips from Jan 2023 to Dec 2025, 1,026 of them cancelled. Last retrained Oct 4, 2026. It covers weather-related risk on Nantucket routes only; mechanical and operational cancellations are not modeled.
46% Brier skill
less error than always predicting the usual 2.8% cancellation rate
0.91 AUC on windy trips
how well it ranks cancelled above running trips when wind is 20+ mph
Tested on 11,943 trips from Jan 2025 on, using a model trained only on the 21,473 trips before then.
Who makes FerryForecast
FerryForecast was made by Veysey Software Solutions, a software development firm.
If you need help with software development, modernizing your AI workflows, or training your team to use agentic tools, we would love to connect.
Recent updates from the operators
Steamship Authority
“SSA Trip Cancellations - 10/08/2026 - MessageID: 67880 — mechanical issues”
Source: SSA email alert
Time: Wednesday 10/7/26 at 6:45 PM EDT
Current Conditions
Data from NOAA Buoy 44020 (Nantucket Sound)
Wind Speed
8.9 mph
7:40 PM EDT
Wind Gusts
11.2 mph
7:40 PM EDT
Wind Direction
WSW (250°)
7:40 PM EDT
Wave Height
1 ft
7:40 PM EDT
Wave Period
3s
6:50 PM EDT
Temperature
64°F
7:40 PM EDT
38 of the last 72 observations include wave height; 23 include dominant wave period (DPD). The buoy doesn't report wave data in every reading — we display the most recent available values, which may be less recent than the wind data.
Vessel Locations
