The upcoming trilogy anime film Wave!! Surfing Yappe!! has released the official dates for the three upcoming movies this year with a new official key visual for the film. The anime will be animated by Asahi Production.
The official dates for the films
Chapter 1: October 2, 2020
Chapter 2: October 16, 2020
Chapter 3: October 30, 2020
You can watch the promotional video here
Source: Wave Official Japanese Website