WeatherPortugal About WeatherPortugal
About Our Service
WeatherPortugal delivers AI-enhanced weather forecasts using data from Open-Meteo and IPMA. Our system processes thousands of data points hourly from real-time weather models to generate detailed, zone-specific forecasts for communities across Portugal.
Each forecast area is divided into zones based on geography and microclimates, providing more precise predictions than regional forecasts alone. We produce multiple forecast products inspired by the US National Weather Service format.
Forecast Products
- Nowcast
- Current conditions and the next few hours, updated hourly.
- Short-Range Forecast (5-Day)
- Detailed outlook for the next 2-5 days with daily summaries.
- Extended Forecast (Long-Range)
- 15-day outlook with daily high/low temperatures and conditions.
- Area Forecast Discussion (AFD)
- Meteorologist-style analysis explaining the forecast reasoning and model performance.
- Advisories
- Alerts for significant weather including cold, heat, rain, wind, frost, fog, and severe storms.
Coverage Area
Currently piloting in 3 areas with 23 forecast zones:
Full coverage of mainland Portugal (20 areas), the Azores, and Madeira is coming soon.
Experimental Project
WeatherPortugal is an experimental weather forecasting project. It is not an official weather service.
This project uses machine learning and automated data processing to generate NWS-style weather products. The forecasts are generated for educational and research purposes only.
Disclaimer
These forecasts are NOT official guidance.
For official weather forecasts and warnings in Portugal, please visit:
- IPMA - Instituto Português do Mar e da Atmosfera (Official Portuguese Meteorological Service)
- ANEPC - Autoridade Nacional de Emergência e Proteção Civil (Civil Protection)
Always follow official guidance during severe weather events. Never rely solely on experimental forecasts for safety-critical decisions.
Data Sources
- Forecast Models: Open-Meteo API (ECMWF IFS, GFS, ICON)
- Current Observations: IPMA (11 weather stations across northern Portugal)
- Text Generation: AI-powered using Nebius AI (Llama 3.3)
- Update Frequency: Nowcast hourly, full forecasts every 3-6 hours, observations every 15 minutes
Zone System
Unlike traditional regional forecasts, WeatherPortugal uses a zone-based system. Each zone represents a coherent microclimate based on:
- Geography: Coastal, inland valleys, mountains, urban areas
- Wind Exposure: Atlantic exposure vs. terrain sheltering
- Municipality Boundaries: Aligned with concelhos for practical use
This allows for more accurate forecasts that account for local conditions like sea breezes, valley fog, and mountain effects.