The Fandom Post is reporting that Netflix debuted the Nagi no Asukara anime under its localized name, A Lull in the Sea, on August 1, 2020. The series is in its original Japanese language and there is an English dub for it but it only has English subtitles.
NIS America released the series as a premium Blu-ray box set. Prior to this, the series was simulcast on Crunchyroll.
Source: The Fandom Post