Lake Powell Weather, Read from the Water
Marina-level forecasts, a wind map that shows the wind days before it arrives, a UV index built for a lake with no shade — and it all still works when the cell signal doesn’t.
A forecast for where your boat actually is
The nearest city forecast is an hour away and a canyon system apart. Navigator gives every marina its own read — current conditions, humidity, visibility, sun times, and a full 7-day outlook for Wahweap, Antelope Point, Bullfrog, and Halls Crossing. You plan around what the lake is doing, not what the city thinks.
- All four marinas — each with its own current conditions and 7-day forecast.
- Hour by hour — temperature, rain chance, and sun through the whole day.
- The details that decide the day — humidity, visibility, and sunrise-to-sunset times at a glance.
See the wind coming days before it arrives
Wind is what cancels Lake Powell plans — not rain. The interactive wind map animates speed, gusts, and direction across the whole lake on a six-day timeline, so the big open-water crossing happens in the calm window and the whitecaps happen without you.
- Speed, gusts, and direction — hour by hour, across every basin of the lake.
- Six days out — scrub the timeline and watch the pattern build before it hits.
- Plan the crossing — pick the calm morning for open water, save the windy afternoon for a protected canyon.
There is no shade out here — know your sun
Summer UV on Lake Powell regularly peaks at extreme, and there isn’t a tree for fifty miles. The hour-by-hour UV forecast shows exactly when the sun turns serious — so you know the 10 AM swim is fine, and 1 PM is when the crew gets under the bimini and the sunscreen comes back out.
- Hour-by-hour UV — watch it climb from 1 at 8 AM to extreme by early afternoon.
- Peak flagged for you — the day’s high and when it hits, called out up front.
- Built for this lake — a sun forecast that matters on water with zero cover.
The forecast rides along past the last bar
Cell service ends a few miles up-lake — the weather doesn’t. Save a snapshot at the marina and the full forecast stays readable on the water, days deep into the canyons. You left with the plan; now the plan stays with you.
- One tap to save — grab the marina forecast before you push off.
- Readable off-grid — conditions and the outlook, with zero bars.
- Made for up-lake — where every other weather app shows a spinner.
Scout the week from home, carry it on the water
The same weather and wind live in the desktop web app — hourly forecasts, the UV curve, and the full wind timeline on a screen big enough to plan a week around. Pick your launch day at the kitchen table; the boat-day details ride along on your iPhone. Same account, always in sync.
- The whole week at once — 7-day outlooks and the wind timeline, side by side.
- Pick the launch day — move the trip a day and dodge the wind before anyone packs.
- Web + iOS — one login, and the plan follows you from desk to dock.
Frequently asked questions
Does the app show weather for each Lake Powell marina?
Yes. Wahweap, Antelope Point, Bullfrog, and Halls Crossing each get their own current conditions and 7-day forecast — temperature, rain chance, humidity, visibility, sun times, and an hourly outlook — instead of one forecast borrowed from the nearest city.
Can I see wind forecasts for Lake Powell?
Yes. An interactive wind map animates wind speed, gusts, and direction across the whole lake, with an hour-by-hour timeline that runs six days out — so you can plan open-water crossings for calm windows.
Does the weather work offline on the lake?
Yes, on iOS. Save a snapshot at the marina and the full forecast stays readable up-lake with zero cell service, so the plan you left with is still in your pocket days later.
How strong is the sun at Lake Powell?
Strong — summer UV regularly peaks in the extreme range by early afternoon, and there is almost no natural shade on the water. The app shows an hour-by-hour UV forecast and flags the daily peak so you know when to cover up.
Never get caught by the afternoon wind
Marina forecasts, wind you can see coming, and a sun index that means something out here — free to try.