Weather Bolt
(formerly HarborCast)
Live radar, lightning alerts, and forecasts. Know before you go.
🌧️ Live Radar
See rain and storms moving in on a live radar map
⚡ Lightning Alerts
Every satellite-detected strike on the map, color-coded by age, with proximity alerts before you hear thunder
🕐 Hourly & 7-Day Forecast
Temperature, wind, and rain hour by hour, and a 7-day outlook
🌀 Storm Tracking
Hurricanes and tropical storms plotted live, with the National Hurricane Center's full forecast cone
🌊 Water Tools (Optional)
Turn on tides and marine conditions in Settings if you boat, kayak, or spend time on the water
⌚ Apple Watch
Current conditions at a wrist-glance, plus live complications
Where the data comes from
Weather Bolt doesn't run its own weather models. It pulls directly from public sources: NOAA and National Weather Service forecasts, NDBC buoy stations for real-time wind and wave observations, and a satellite-based lightning detection network for strike data. That means the numbers on screen are the same underlying data meteorologists use. A guide to reading marine forecast numbers →
Lightning and storm tracking
The lightning layer plots every satellite-detected strike on a live radar view, color-coded by how recently it occurred, with proximity alerts that fire before you'd normally hear thunder. During hurricane season, Weather Bolt also overlays the National Hurricane Center's full forecast cone so a storm's projected path is visible on the same map as your local conditions. What to do if a storm catches you out →
Forecasts
Check the next few hours or the week ahead. You get an hourly forecast and a 7-day outlook for the places you save.
Water tools, if you want them
Turn on Water tools in Settings to add tide predictions and marine conditions. You can also set your own wind, wave, and visibility limits, and each hour of the forecast is rated Good, Poor, or Dangerous against them. These tools are for boaters, kayakers, and anyone on the water. They stay off unless you turn them on.
On your wrist
The Apple Watch companion shows current conditions at a glance, along with complications for the watch face, so a status check doesn't require pulling out a phone.