Tides
See high and low water on a tide curve with "now" marked. Touch the chart to check the tide at any time.
Free · Worldwide
Read the water
My Helm Weather
Read the water
before you cast off.
A free marine weather app for boaties. Tap anywhere on the water to see tide times and heights, the sea state and swell, wind and gusts in knots for the next three days, and a simple day-by-day forecast.
Free to useNo account or sign-upWorks on phone, tablet or computer
Live example: San Diego, shown in US units
Made for boating
The forecast a skipper actually wants.
Wind in knots, waves in metres, visibility in nautical miles and tides front and centre—set out with large, clear charts you can read at a glance.
Sea state and swell
Wave height and swell hour by hour, with a plain-English sea state (Calm, Slight, Moderate, Rough) and arrows showing which way the waves are travelling.
Wind for 3 days
Wind and gust speeds hour by hour, with arrows showing which way it's blowing and night-time shaded.
Day by day
A simple daily summary to help you pick the best day for a trip.
Any spot on the water
Use your GPS position, tap a spot on the nautical map, or search for a place by name.
Official NZ tides
Tide predictions for around 90 New Zealand ports from LINZ, refreshed automatically every month.
A look inside
Clear charts, plain English.
Every chart has a one-line summary at the top, and you can touch any point to see that hour.
Available worldwide
Wherever you keep your boat.
My Helm Weather works around the world, in metric or US units. Tides use official LINZ predictions in New Zealand and NOAA predictions in the United States; elsewhere they are estimated from an ocean model.
Needs internet: forecasts, sea state and tides are fetched live, so you'll need a mobile or Wi-Fi connection to refresh them.
01
Open the appNo purchase, account or download from an app store.
02
Choose your spotUse your position, pick on the map or search a place.
03
Check tide, sea and windTouch the charts to see any hour.
04
Add to home screenKeep it one tap away on your phone or tablet.
Skipper’s notes · free
Get boating tips and app news by email.
An occasional email from Mike with new features in My Helm Weather, handy tide and weather tips, and news about the My Vessel apps. No spam.
Part of the My Vessel family
Like it? There's more
Add maintenance and navigation.
My Vessel Log keeps your engine hours, servicing and trips in order. My Helm puts your position on LINZ (NZ) or NOAA (US) charts with Saved Places and Anchor Watch. One-off prices, no subscription.
Important safety information
A planning aid—not an official forecast.
Always check MetService (New Zealand) or the National Weather Service (United States) and local conditions before heading out.
Is it really free?
Yes. My Helm Weather is free to use with no account, no sign-up and no subscription.
Where does the forecast come from?
Forecast and wave data come from Open-Meteo. Tide predictions come from LINZ (Toitū Te Whenua) in New Zealand and NOAA in the United States. Maps are from OpenStreetMap and OpenSeaMap.
Does it work outside New Zealand?
Yes. Wind, sea state and forecasts work worldwide. Outside New Zealand and the United States, tides are estimated from an ocean model, so treat them as a guide.
Does it work offline?
No. It needs an internet connection to load the latest forecast, sea state and tides.
Why is there no sea state for my spot?
Wave forecasts cover open and coastal water. Very sheltered spots—up a river or deep in a harbour—may show no sea state, or the nearest open-water reading instead.