The Delta Aquariids are active beginning in mid-July and are visible until late-August. These faint meteors are difficult to spot, and if there is a moon you will not be able to view them. If the moon is not present, your best chance to see the Delta Aquariids is when meteor rates rise during the shower’s peak at the end of July.
If you are unable to view the Delta Aquariids during their peak, look for them again during the Perseids in August: You will know that you have spotted a Delta Aquarid if the meteor is coming from the direction of the constellation Aquarius—its radiant will be in the southern part of the sky. The Perseid radiant is in the northern part of the sky.
Data from NASA
Interactive animation from MeteorShowers.org.