In most words the primary stress falls on the penultimate vowel and secondary stresses fall on every second syllable preceding that. This is true of suffixed forms as well, as in níma 'hand', nimá-gi 'my hand'; níu 'coconut', niyúna 'its coconut'.
Blust, Robert (1984). "A Mussau vocabulary, with phonological notes." In Malcolm Ross, Jeff Siegel, Robert Blust, Michael A. Colburn, W. Seiler, Papers in New Guinea Linguistics, No. 23, 159-208. Series A-69. Canberra: Pacific Linguistics.
Ross, Malcolm (1988). Proto Oceanic and the Austronesian languages of western Melanesia. Canberra: Pacific Linguistics.
Mussau Grammar Essentials by John and Marjo Brownie (Data Papers on Papua New Guinea Languages, volume 52). 2007. Ukarumpa: SIL.