Aia nā mokupuni ʻo Mentawai i nā heʻenalu maikaʻi loa ma ka honua. ʻOi aku ka ʻoi aku o nā ʻaoʻao hema a me nā kuleana ma ka ʻāina hoʻokahi ma mua o nā wahi āpau o ka honua. Loaʻa i nā Mentawai ka pehu a puni ka makahiki me ka manawa kūpono loa ma waena o Malaki a me Nowemapa. Heʻenalu i nā ʻale i nā ʻano nui o nā ʻāʻu, nā haʻihaʻi kahakai, nā lae a me nā kai kūʻokoʻa. ʻO ka wai ʻōpua, ʻulaʻula a me ka nui o nā ʻano nalu e hoʻokipa i nā pae akamai mai waena a i pro.
ʻOiai he mau nalu a puni ka makahiki, a ʻo ke kau "off" hiki ke kūpono i ka lehulehu, ʻo ka manawa maikaʻi loa o ka makahiki i ka wā maloʻo. Mai ka hopena o Malaki a i ka hoʻomaka ʻana o Nowemapa, i ka wā hoʻoilo o ka ʻaoʻao hema, hoʻopuka ka Moana ʻĪnia i nā ʻauwai paʻa ʻole.
ʻO nā Mokupuni Mentawais ka nui o nā kūlana aniani me ka ea temps i ka 80 a 90's, a me ka wai temps i waena o ka 80 kiʻekiʻe. Paʻa loa ka lā ma kahi kokoke i ka equator, e hana ana i nā pale lā kiʻekiʻe, nā kiaʻi ʻino, nā pāpale, a me ka nui o ka wai.
ʻO nā kālepa Easterly ka mea maʻamau o Mei a hiki i ʻAukake / Sepatemaba a he kūpono no ka nui o nā hoʻomaha nui. ʻO Nowemapa a hiki i Feberuari ke loaʻa nā makani komohana komohana, a aia kekahi mau wahi i makemake i kēia kuhikuhi makani. ʻO nā mahina hoʻololi, i ka wā e hoʻololi ai nā kau o Malaki/ʻApelila a me Sepatemaba/ʻOkakopa he māmā a ʻano makani. ʻO kēia mau manawa he aniani a hiki ke lilo i manawa maikaʻi loa no ka hoʻāʻo hou ʻana i nā ʻano kiko.