The sea, hour by hour.
Down to 500m precision.
Wind, gusts, swell, sea temperature, and ocean currents for any point at sea. Pairing Apple Weather with Copernicus marine models that respect coastal geography.
Models That Respect Geography
Marine data routed dynamically from Copernicus to the sharpest model for where you float — from 500m in straits to global ocean grids.
Sea of Marmara Ultra-Fine Grid
Resolves the strait dynamics MARLOG needs for the Marmara: Bosphorus and Dardanelles surface currents and counter-currents, and sea temperature across the enclosed bays.
Black Sea Hydrodynamic Model
Resolves the steep, short-period chop characteristic of the Black Sea basin, plus the cyclonic rim currents that run around it.
Mediterranean & Aegean Model
Resolves the swell that rugged island topography makes of the Meltemi through the Cyclades and Dodecanese, at 4.2 km across the whole basin.
Copernicus Global Marine Model
Seamless coverage across the Atlantic, Pacific, Indian Ocean, and Caribbean. Deep ocean swell trains and the major oceanic boundary currents.
How MARLOG Forecast Works
Precision oceanic modeling combined with intuitive timeline indicators designed for active passage planning.
Reading the water on one screen
Combines air and sea temperature, wind speed and max gusts, swell height and period, a wind rose, 3-hour interval tables, sun times, humidity, visibility, precipitation probability, and UV index.
A 12-hour wind outlook
The Home sailing window shows up to 12 hourly wind readings. Taller bars mean stronger wind. Lime marks the current hour; later hours at 18 knots or above use amber, and the other hours are muted. The chart does not score waves or decide when it is safe to depart.
How to read a sailing windowAutonomous 3-hour sea alerts
MARLOG checks your vessel’s home harbour every three hours against Copernicus and MET Norway feeds, notifying you when swell or gale-force gusts turn rough.
Explore a forecast example
Explore invented wind and sea readings at two-hour intervals. The Home wind chart uses hourly bars; this example shows how separate forecast measurements can be compared. It is not live weather or a departure recommendation.
Marine Physics, Not Generic Land Weather
How MARLOG Forecast provides the hydrodynamics skippers need before leaving port.
Questions about MARLOG Forecast
Everything you need to know about Copernicus 500m models, Apple Weather integration, sailing windows, and sea alerts.