The weather app for the court
Knowday summarizes forecast wind, glare, and modeled drying after overnight rain so you can compare today's conditions and inspect the court yourself.
Today · your court
What matters on the court
Could overnight rain still matter?
Knowday combines recent rain with the forecast drying window; it cannot observe the court. Inspect the actual surface instead of treating sunshine as proof.
Wind on the ball
A tennis lob or a pickleball dink lives or dies on a calm court. Knowday reads the wind and finds the steadiest window.
Glare on the serve
A hard, cloudless sky throws glare on serves and lobs — a little cloud is kinder. Knowday reads cloud cover so the light isn't fighting you.
Heat you'll feel on asphalt
The forecast feels-like, plus the honest note that a dark court can run hotter than the air. Use local heat guidance and your usual plan.
How it works
It summarizes the forecast feels-like, wind, rain window and downpour rate, recent rain for a modeled drying estimate, humidity, glare from the sky, and UV.
One honest limit: it reads the air, not the court surface — it cannot verify surface moisture or determine whether the court is suitable for play. Inspect the court and follow local guidance.
Court sports is one of sixteen plans Knowday reads — walks and rides, the lawn, the garden, camping, the night sky, and the water.
See all plansNo catch
Free to use. No sign-up. Knowday sends an area-level location to Open-Meteo to fetch your forecast.