Weather details — wind, gusts, forecast, marine outlook

Read the full weather sheet — current conditions, the outlook periods, marine alerts, and the source line that names which feed produced them.

Open the Weather sheet from the TODAY card on Mission Control, from the weather summary at the top of the Today tab, or from a trip's destination forecast card. Locations you have pinned are a PINNED strip of chips inside the sheet — tap one to make it the top card. The top card is current conditions. Below it, OUTLOOK lists NOAA's 12-hour forecast periods, and tapping a period opens its full forecast text. There is no hourly band. The SEAS card between them keeps two things apart: NOAA's wave FORECAST for the spot, and what the nearest NOAA buoy MEASURED, each reading with its age.

Steps

1. Open the sheet

   Mission Control → TODAY card → tap the weather row. Or open it from the weather summary at the top of the Today tab, or from a trip's destination forecast card.

2. Read current vs. forecast

   Top card: temperature, a short conditions line, then a metric row — Wind (direction and speed), Waves when NOAA forecasts waves for your position (a calm sea under half a foot reads "under ½ ft", never 0), Precip when the forecast carries a chance, and Period. The period's forecast text sits underneath. Gust is not on this sheet. It travels to the Apple Watch instead, where the helm screen prints it under the wind reading as "G12 fcst". What renders below is a stack of active NOAA marine alerts — Small Craft Advisory, Gale Warning, Special Marine Warning and the like — worst first. theONE does not fetch an NWS zone forecast.

3. Source feeds

   Everything on this sheet comes from NOAA. Wind, temperature and conditions are the National Weather Service forecast (api.weather.gov) for your position. Waves are the same forecast office's wave grids — wave height, and the wave period and swell where the office forecasts them; a spot with no wave forecast says "No wave forecast here" rather than showing a zero, and if the wave request fails the card says so instead. Marine alerts come from NOAA's active-alerts feed for your position. NOAA covers U.S. waters; outside them the sheet says no NOAA forecast covers the spot, because theONE does not use another forecast service. Visibility is not shown. A source line names the provider, where your position came from (GPS, Boat GPS or Homeport), and how long ago the forecast was fetched.

4. With no signal

   Every NOAA forecast theONE fetches is also kept on this device (not on the watch), for the six most recent places. When a fetch fails — no signal, or NOAA not answering — and a forecast was kept within 30 km of you in the last 24 hours, theONE shows that one instead. The TODAY chip and the Today tab add "as of <time>" to the conditions line, and this sheet's source line says how long ago it was fetched. Departure windows never gives the no-marine-alert point on a kept forecast: an old "no alerts" is not today's answer. Outside NOAA coverage nothing is put in place of a forecast. With nothing kept, the TODAY chip and the Today tab say why: "No signal — the forecast needs a connection", "No NOAA forecast covers this spot", or "Tap to retry weather".

5. Measured at the nearest buoy

   Under the wave forecast, SEAS shows the nearest NOAA weather buoy within 50 nautical miles and what it MEASURED, not what is forecast: wave height, wave period and the direction the waves come from, wind speed, gusts and direction, air and water temperature — each with how long ago it was measured ("12 min ago"), under "Measured by NOAA NDBC" (NOAA's National Data Buoy Center). A reading the buoy did not report is left out, never shown as 0, and a station with nothing in the last 24 hours says so. Readings are fetched at most once an hour and the last ones stay on this device, so with no signal you still see them, with their age. Only the buoy's number is sent to NOAA for this, not your position. The same readings open from a buoy pin on the chart (Layers → Buoys).

Related

• Pinned weather locationsPin the spots you cruise to — home port, favorite anchorages, destinations — to see weather for each at a glance.
• Trip departure planning — the next 72 hoursDeparture Windows finds the best times to leave the dock over the next 72 hours by scoring each hourly slot against four criteria.
• Mission Control TODAY chip — your phase-aware checklist for right nowUnderstand the Mission Control TODAY chip — what it shows, how it's different from Mission Control, and how the Morning Brief works.

← All help articles