Type a coordinate and see 50 years of hourly weather history for that spot:
how windy it gets, how rough the sea is, and how often conditions would stop work.
Accepts decimal degrees, degree-minute-second (as copied from Google Earth — with or without the N/E letters; latitude first), or a Google Maps link.
Each location is downloaded once and saved in your browser, so it opens instantly next time.
Click the map to move the point — an "Analyze this point" button appears on the marker.
Blue dot: centre of the wind data square · green dot: centre of the offshore wave data square.
Top-right control switches satellite / street view.
Wind rose
Wave rose
Wave numbers come from a coarse (~50 km) offshore weather reconstruction.
They are good for planning and comparing sites, but they smooth out the worst storms and do not account for
local shallow-water effects near a breakwater. For design or contract decisions, a site-specific wave study is still needed.
The higher the wave limit, the more this underestimation matters.
Monthly workability
Has the wind changed over the years?
Each row looks at a different slice of history, all ending today. If recent rows differ clearly from the 50-year row, the local wind climate may be shifting.
Compare with another location
Analyze a second location and it will appear here for side-by-side comparison.
Values follow the selected period and units; the downtime row uses the limits you switched on in the workability panel.
Wind through the year
Temperature through the year
What do these numbers mean? — plain-language guide
Where does the data come from?
From ERA5 — a global "weather archive" maintained by Europe's weather centre (ECMWF). It is the past weather
recomputed hour by hour from decades of real observations (satellites, ships, buoys, stations), all the way back to 1940.
We read it through the free Open-Meteo service. Nothing here is a forecast — it is history.
How do I read the wind rose?
Each petal points in the direction the wind comes from. A longer petal means wind blows from there more often;
the colors show how strong it typically is. Example: a long petal at N means frequent northerly winds.
What is a "windy / storm threshold"?
A way to describe how bad it gets, ignoring rare freak hours. "Windy threshold 8 m/s" means 10% of all hours are windier
than that and 90% are calmer (statisticians call this the 90th percentile, P90). The "storm threshold" is the same idea for
the worst 1% of hours (P99).
What exactly is "wave height" here?
Significant wave height (often written Hs): the average of the highest one-third of waves — roughly what an experienced
sailor would report as "the wave height". Individual waves can reach about twice this value.
Wind vs gust?
"Wind" is the average over an hour. A "gust" is a burst of a few seconds that is noticeably stronger — gusts are what
matter for crane and lifting operations.
Average downtime vs "worst year"?
The average tells you what a typical January looks like over decades. But years differ a lot — the "worst year" view shows
the roughest January (or any month) in the period, so you can see the risk of planning around the average.
What is a "calm window"?
Many marine operations need not just a calm hour but a calm stretch — e.g. 24 or 48 hours in a row below the limit.
The calm-windows view shows what share of each month's time falls inside such uninterrupted stretches. High = plannable month.
Calm?
Hours with wind below 1 m/s (3.6 km/h) — smoke rises almost straight up, sea surface is glassy.
Why is the analyzed point a few km from where I clicked?
The weather model divides the world into squares of about 25 km (wind) and 50 km (waves). We use the square closest
to your point and always show you which one, so numbers represent the area — not one exact spot.