# Nantucket ferry schedule & forecast Updated at 9:01 PM ET Trips from Hyannis to Nantucket No more departures today. Friday 10/9: lowest chance of running 99%, highest 99% | Time | Vessel | Probability | Wind | Gusts | Waves | Dir | | --- | --- | --- | --- | --- | --- | --- | | 6:10 AM | Hy-Line Fast | 99% | 11.8 mph | 15.7 mph | 1.6 ft | WSW | | 6:30 AM | SSA Trad. | 99% | 11.8 mph | 15.7 mph | 1.6 ft | WSW | | 8:15 AM | SSA Fast M/V Iyanough | 99% | 14.5 mph | 17.9 mph | 1.6 ft | WSW | | 9:15 AM | SSA Trad. | 99% | 15.4 mph | 20.4 mph | 1.6 ft | W | | 9:30 AM | Hy-Line Fast | 99% | 15.4 mph | 20.4 mph | 1.6 ft | W | | 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 | WSW | | 12:45 PM | Hy-Line Fast | 99% | 15.7 mph | 23.7 mph | 2 ft | WSW | | 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 | WSW | | 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 | WSW | | 8:30 PM | Hy-Line Fast | 99% | 11.1 mph | 17.2 mph | 2.2 ft | WSW | Saturday 10/10: lowest chance of running 99%, highest 99% Sunday 10/11: lowest chance of running 99%, highest 99% Monday 10/12: lowest chance of running 85%, highest 99% Tuesday 10/13: lowest chance of running 99%, highest 99% Wednesday 10/14: lowest chance of running 98%, highest 99% Thursday 10/15: lowest chance of running 99%, highest 99% **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](https://en.wikipedia.org/wiki/Brier_score#Brier_Skill_Score_(BSS)) less error than always predicting the usual 2.8% cancellation rate 0.91 [AUC on windy trips](https://en.wikipedia.org/wiki/Receiver_operating_characteristic#Area_under_the_curve) 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. [Explore model performance & methodology →](https://ferryforecast.com/model) Who makes FerryForecast FerryForecast was made by [Veysey Software Solutions](https://www.veyseysoftwaresolutions.com/?utm_source=ferryforecast&utm_medium=referral&utm_campaign=studio&utm_content=makers-note), 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](mailto:cooper@veyseysoftwaresolutions.com). 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)](https://www.ndbc.noaa.gov/station_page.php?station=44020) Wind Speed 8.9 mph 8:30 PM EDT Wind Gusts 8.9 mph 8:30 PM EDT Wind Direction WSW (250°) 8:30 PM EDT Wave Height 1 ft 8:20 PM EDT Wave Period 3s 8:20 PM EDT Temperature 64°F 8:30 PM EDT 39 of the last 72 observations include wave height; 24 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 ## Nantucket Fleet IYANOUGH (SSA · Fast Ferry) EAGLE (SSA · Traditional Ferry) GREY LADY (Hy-Line · Fast Ferry) GREY LADY IV (Hy-Line · Fast Ferry) --- Markdown copy of https://ferryforecast.com/