Data and methodology

Forecast source

Ocean temperature forecasts are derived from coastal information published by Instituto Português do Mar e da Atmosfera, I.P. (IPMA). Tempocean periodically creates a compact static snapshot so visitors do not generate requests to IPMA.

Map source

The interactive basemap uses OpenStreetMap data and tiles. Location coordinates are displayed as decimal degrees.

Limitations

Displayed values are model-based forecasts, not guaranteed real-time measurements. Data can be delayed, incomplete or inaccurate. Tempocean retains the previous valid value when an individual source update fails.