Marine　climate　significantly　influences　the　spatial　morphology　of　coastal　village’s　streets.　However,　research　on　coastal　villages　lacks　spatial　parameterization　analysis　that　can　cope　with　the　complex　climatic　environment.　Focusing　on　the　coastal　village’s　street　in　Fuzhou　City,　China,　this　paper　studies　the　relationship　between　street　space　morphology　and　the　impact　of　extreme　heat　and　wind　conditions.　Thermal　comfort　degree　and　the　average　wind　speed　are　main　optimization　objectives.　By　using　parameterization　techniques　to　establish　a　dynamic　model　and　conducting　multi-objective　optimization　driven　by　genetic　algorithms,　the　degree　of　influence　of　morphological　indicators　and　climate　indicators　is　revealed.　The　conclusions　of　the　study　indicate　that　the　morphological　indicators　of　the　main　space　have　a　more　significant　impact　on　the　climatic　environment　than　the　morphological　indicators　of　the　interfaces　on　either　side　of　the　street.　The　influence　of　thermal　comfort　indicators　on　the　street　space　within　the　climate　environment　is　greater　than　that　of　wind　speed　indicators.　This　study　concludes　by　proposing　a　ranking　of　key　morphological　indicators　along　with　their　optimal　intervals　for　coastal　villages　adapted　to　the　marine　climate.　The　key　morphological　indicators,　listed　in　order　of　importance,　include　appropriate　street　widths　(2.3–4.3　m),　eave　height　for　single-storey　buildings　(2.0–4.6　m),　eave　height　for　double-storey　buildings　(5.4–7.7　m),　eave　depth　(0.8–1.1　m　for　brick-timber　dwellings　and　0.3–0.6　m　for　masonry　dwellings),　roof　slope　(20–28°),　entrance　space　depth　(0.8–1.3　m),　balcony　overhang　depth　(0.6–0.7　m),　colonnade　depth　(1.5–2.4　m),　street　orientation　(NE-SW)　and　building　depth　(3.2–5.0　m).　This　study　provides　an　empirical　reference　for　climate-adapted　village　design　and　renewal.　©　The　Author(s)　2024.