Ko da yake wasu thermophiles girma mafi kyau a yanayin zafi sama da 45 ° C (113 ° F), a wurare kamar zafi marẽmari; hyperthermophilic archaea girma optimally a yanayin zafi sama da 80 ° C (176 ° F). The archaeal Methanopyrus kandleriin 116 iya ko haifuwa a 122 ° C (252 ° F), da mafi girma da aka rubuta zafin jiki na kowane kwayar halitta. Sauran archaea wanzu a cikin sosai acidic ko alkaline yanayi. Alal misali, daya daga cikin mafi matsananci archaea acidic archaea ne Picrophilus torridus, wanda a pH 0, wanda yake shi ne a cikin dukan teku sulfuric acid. Wadannan archaea ma sun fi girma a wurare masu zafi sama da 45 ° C (113 ° F), a wurare kamar zafi marẽmari. Wadannan archaea ma suna da yawa a cikin archaea. Wasu nazarin archaea sun nuna cewa ba za a iya yin amfani da su a cikin yanayin zafi mai yawa ba, kamar yadda yake faruwa a cikin duniyar duniyar duniyar, ba za a iya yin amfani da su ba.
122 °C