Marine Operations · Workability

Weather Window

Estimate weather downtime for a marine activity from live hindcast wave data, using an operability threshold and a persistence (minimum-window) rule.

go/no-go · Hs & Tp gated
persistence-window method

Location

Click the map to drop a pin, or enter coordinates directly. The site must be at sea — the wave model has no data over land.

Latitude

Longitude

Activity

Activity name

Max Hs, allowable metres, sig. wave height

Max Tp, allowable seconds, peak period

Activity duration hours to complete task

Min. required window continuous calm hours

Activity start date when it's planned to begin

Analysis window days after that date

Lookback years past years of hindcast

Wave data: Open-Meteo Marine API — an ERA5 / wave-model-based hindcast, fetched live for the selected coordinates. No account or key needed. Downtime is seasonal: it's calculated from the same calendar window (start date onward) across each of the past lookback years, since sea state depends heavily on time of year. For contractual / project-grade certainty, cross-check against a licensed metocean study (e.g. Copernicus Marine, NOAA WaveWatch III, or site buoy data).

Results

Drop a pin at sea, set the criteria, then fetch the hindcast.