Laetesia peramoena is a species of sheet weaver endemic to New Zealand.
This species was described as Linyphia peramoena in 1879 by Octavius Pickard-Cambridge from male and female specimens. In 1988, it was transferred to the Laetesia genus. It was most recently revised in 2003.
The male is recorded at 3.0-3.2mm in length whereas the female is 2.8-3.0mm.
This species is only known from the South Island of New Zealand. This species has an orange carapace with a dark stripe medially. The legs yellow to pale brown. The abdomen is grey with white blotches.
Under the New Zealand Threat Classification System, this species is listed as "Not Threatened".