About Žvejybos prognozė

Why this site exists

The idea came from simple frustration – most "fishing calendars" online rely only on the moon phase and are drawn up a year in advance, without accounting for what the weather will actually be like that day. Yet air pressure, temperature and wind really do have a bigger influence on the bite than the moon phase. So we decided to build a system that calculates a forecast every day from real, real-time weather data, not a fixed annual table.

How it works

Every time you select a lake, the system fetches current meteorological data from the free "Open-Meteo" service – air pressure and its trend, temperature, wind, cloud cover, precipitation, and it also calculates the moon phase. These seven factors are combined into a single algorithm that separately evaluates the bite probability for white fish (bream, roach, tench) and predatory fish (pike, perch, catfish). We additionally calculate a water temperature estimate – since water heats up and cools down far more slowly than air, we use the weekly average air temperature rather than the instantaneous value.

It's important to understand: this is a guideline forecast, not a guarantee. Fish behaviour also depends on many other things – the specifics of a given body of water, bait, location, experience. Our system only helps narrow down when it's worth grabbing your rod, and when it might be better to wait for another day.

What you'll find on the site

• A bite forecast for 917 of the most popular lakes and reservoirs in Lithuania
• A 7-day forecast ahead
• Species-specific tips – bait, colour, depth, best time and spot based on current weather
• A brief overview of spawning protection periods (always check the latest rules on the AAD website)
• A blog with practical fishing tips

Who maintains us

The site is run and maintained by the Žvejybos prognozė team (Administrator). If you've spotted an error, have suggestions, or just want to say hello – write to us at info@zvejybosprognoze.lt.

Data source

All weather data comes from Open-Meteo – a free, open-source meteorological API. Data is updated every hour.