You can get Radiant Tides from the Item Exchange shop and Events, as well as compensation for maintenance, hotfixes, and updates in your mail.
Scroll down and read more to learn where to look if you want more Radiant Tides for your Character Event Convene Pulls in Wuthering Waves.
How to Get Radiant Tides in Wuthering Waves
Item Exchange

You can get Radiant Tides by purchasing them from the following shops in Wuthering Waves:
| Item Exchange Shops That Sell Radiant Tides | Purchase Cost | Purchase Limit |
|---|---|---|
| Aftershocked Coral | x8 Afterglow Corals per Radiant Tide | None |
| Oscillated Coral | x70 Oscillate Corals per Radiant Tide | x6 per reset |
TIP: You can get both Afterglow Corals and Oscillated Corals by pulling on Convenes. We highly recommend buying all Radiant Tides, Lustrous Tides, and Forging Tides from the Oscillated Coral Item Exchange before the shop resets!
Mail & Event Rewards

Radiant Tides are rare—so rare, in fact, that the only other sources you can get it from aside from the Item Exchange shop are Events and your mail.
One example of such an event is the Gifts of Thawing Frost event which gives you up to 4 Radiant Tides if you log in for seven days for the first time as a beginner.
TIP: Always save your Astrites for Radiant Tides, as Character Event Convenes offer much better value than the Permanent Convene. Never use your Astrites to buy Lustrous Tides!

You can also count on the devs' generosity here in Wuthering Waves, as you can also claim Radiant Tides just from the mail rewards they send out to players after every update, hotfix, maintenance, or social media event.
Just make sure to claim these rewards in your mail ASAP as they might expire if you let them sit in there too long!
What are Radiant Tides?
Event Convene Currency

Radiant Tides are used in the Character Event Convenes (i.e. Banners), which allows you to pull for characters that are only available for a limited time. You can buy 1 Radiant Tide with 160 Astrites, which is the same rate of exchange as Forging Tides and Lustrous Tides.