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About TTWA

TTWA - The Triathlete's Weather Assistant - your intelligent companion to find the best time for your training!

Our Mission

TTWA was born from a simple question that every triathlete asks: "When is the right time to go out and train?" Whether it's for a short session or a long outing, the weather can change everything. TTWA helps you plan your training considering outdoor conditions — for more comfort, consistency and enjoyment in your practice.

What we offer

Weather analysis

Comprehensive weather data including water temperature, air temperature, feels-like temperature, wind, gusts, swell, precipitation and UV index for accurate training recommendations.

Training scores

Scientific scoring system (0-100%) for swimming, cycling and running based on optimal weather conditions.

7-day forecast

Extended weather forecasts to help you plan your training week and make the most of favourable conditions.

Optimal timing

Hourly recommendations to find the best time slots for each training activity throughout the day.

PWA support

Install as a Progressive Web Application for offline access and a native app-like experience on any device.

Made by athletes

Created by triathlon enthusiasts, aware of the real impact of weather on training quality and consistency.

How it works

1

Location detection or search

Allow location access for automatic detection or manually search for your training location.

2

Weather data analysis

We retrieve comprehensive weather data and analyse conditions specific to triathlon training requirements.

3

Intelligent recommendations

Receive personalised training scores and optimal time slots for swimming, cycling and running activities.

Data sources and technology

TTWA uses reliable weather data from Open-Meteo, providing accurate and up-to-date weather information for locations worldwide.

Built with modern web technologies including React, TypeScript and Progressive Web Application capabilities for a fast, reliable and accessible user experience.

Open-Meteo APIOpenWeatherMapDWD WeatherECMWFGFS