<?xml version="1.0" encoding="UTF-8"?>

<!--XBRL Document Created with the Workiva Platform-->
<!--Copyright 2026 Workiva-->
<!--r:019e1801-31aa-7a1b-b77f-e24a665c66d5,g:37040350-0f00-4631-a259-2f780e81200a-->
<link:linkbase xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd">
  <link:roleRef roleURI="http://www.swgas.com/role/Cover" xlink:type="simple" xlink:href="swx-20260507.xsd#Cover"/>
  <link:presentationLink xlink:role="http://www.swgas.com/role/Cover" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_dei_CoverAbstract_019e1801-31aa-7664-a7e3-675ccfc3b7b7" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_CoverAbstract"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntitiesTable_019e1801-31aa-7cce-bf20-99259b914ac2" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_EntitiesTable"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019e1801-31aa-7664-a7e3-675ccfc3b7b7" xlink:to="loc_dei_EntitiesTable_019e1801-31aa-7cce-bf20-99259b914ac2" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementClassOfStockAxis_019e1801-31aa-70ce-8f87-627450e43c1a" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_StatementClassOfStockAxis"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_EntitiesTable_019e1801-31aa-7cce-bf20-99259b914ac2" xlink:to="loc_us-gaap_StatementClassOfStockAxis_019e1801-31aa-70ce-8f87-627450e43c1a" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_019e1801-31aa-7a89-affe-83f3263c26ce" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ClassOfStockDomain"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementClassOfStockAxis_019e1801-31aa-70ce-8f87-627450e43c1a" xlink:to="loc_us-gaap_ClassOfStockDomain_019e1801-31aa-7a89-affe-83f3263c26ce" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_swx_PreferredStockPurchaseRightsMember_019e1801-31aa-746d-a05c-df4840e80fe1" xlink:href="swx-20260507.xsd#swx_PreferredStockPurchaseRightsMember"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ClassOfStockDomain_019e1801-31aa-7a89-affe-83f3263c26ce" xlink:to="loc_swx_PreferredStockPurchaseRightsMember_019e1801-31aa-746d-a05c-df4840e80fe1" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockMember_019e1801-31aa-72f6-bd22-5cf63ab7b4c7" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CommonStockMember"/>
    <link:presentationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ClassOfStockDomain_019e1801-31aa-7a89-affe-83f3263c26ce" xlink:to="loc_us-gaap_CommonStockMember_019e1801-31aa-72f6-bd22-5cf63ab7b4c7" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityInformationLineItems_019e1801-31aa-7b60-8e3b-9e0204b9fc94" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_EntityInformationLineItems"/>
    <link:presentationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_EntitiesTable_019e1801-31aa-7cce-bf20-99259b914ac2" xlink:to="loc_dei_EntityInformationLineItems_019e1801-31aa-7b60-8e3b-9e0204b9fc94" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentType_019e1801-31aa-7edd-b633-0b0e128e384b" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_DocumentType"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_EntityInformationLineItems_019e1801-31aa-7b60-8e3b-9e0204b9fc94" xlink:to="loc_dei_DocumentType_019e1801-31aa-7edd-b633-0b0e128e384b" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentPeriodEndDate_019e1801-31aa-7e7f-ba7b-0f7423f0d7c2" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_DocumentPeriodEndDate"/>
    <link:presentationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_EntityInformationLineItems_019e1801-31aa-7b60-8e3b-9e0204b9fc94" xlink:to="loc_dei_DocumentPeriodEndDate_019e1801-31aa-7e7f-ba7b-0f7423f0d7c2" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityRegistrantName_019e1801-31aa-7122-bce6-29e7e827c9a7" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_EntityRegistrantName"/>
    <link:presentationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_EntityInformationLineItems_019e1801-31aa-7b60-8e3b-9e0204b9fc94" xlink:to="loc_dei_EntityRegistrantName_019e1801-31aa-7122-bce6-29e7e827c9a7" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityFileNumber_019e1801-31aa-7eef-a42c-62810696489d" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_EntityFileNumber"/>
    <link:presentationArc order="4" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_EntityInformationLineItems_019e1801-31aa-7b60-8e3b-9e0204b9fc94" xlink:to="loc_dei_EntityFileNumber_019e1801-31aa-7eef-a42c-62810696489d" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityIncorporationStateCountryCode_019e1801-31aa-7fe2-aaa3-c1798607f8d6" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_EntityIncorporationStateCountryCode"/>
    <link:presentationArc order="5" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_EntityInformationLineItems_019e1801-31aa-7b60-8e3b-9e0204b9fc94" xlink:to="loc_dei_EntityIncorporationStateCountryCode_019e1801-31aa-7fe2-aaa3-c1798607f8d6" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityTaxIdentificationNumber_019e1801-31aa-75fb-8608-34aa6dadf57a" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_EntityTaxIdentificationNumber"/>
    <link:presentationArc order="6" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_EntityInformationLineItems_019e1801-31aa-7b60-8e3b-9e0204b9fc94" xlink:to="loc_dei_EntityTaxIdentificationNumber_019e1801-31aa-75fb-8608-34aa6dadf57a" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressAddressLine1_019e1801-31aa-726a-b052-4c4958cbefd0" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_EntityAddressAddressLine1"/>
    <link:presentationArc order="7" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_EntityInformationLineItems_019e1801-31aa-7b60-8e3b-9e0204b9fc94" xlink:to="loc_dei_EntityAddressAddressLine1_019e1801-31aa-726a-b052-4c4958cbefd0" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressAddressLine2_019e1801-31aa-730c-91b5-7d5e5e817253" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_EntityAddressAddressLine2"/>
    <link:presentationArc order="8" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_EntityInformationLineItems_019e1801-31aa-7b60-8e3b-9e0204b9fc94" xlink:to="loc_dei_EntityAddressAddressLine2_019e1801-31aa-730c-91b5-7d5e5e817253" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressCityOrTown_019e1801-31aa-7c84-95eb-e40cd8f3d7ae" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_EntityAddressCityOrTown"/>
    <link:presentationArc order="9" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_EntityInformationLineItems_019e1801-31aa-7b60-8e3b-9e0204b9fc94" xlink:to="loc_dei_EntityAddressCityOrTown_019e1801-31aa-7c84-95eb-e40cd8f3d7ae" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressStateOrProvince_019e1801-31aa-7004-93d3-f19566d2157c" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_EntityAddressStateOrProvince"/>
    <link:presentationArc order="10" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_EntityInformationLineItems_019e1801-31aa-7b60-8e3b-9e0204b9fc94" xlink:to="loc_dei_EntityAddressStateOrProvince_019e1801-31aa-7004-93d3-f19566d2157c" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressPostalZipCode_019e1801-31aa-70db-b74d-533ec84200df" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_EntityAddressPostalZipCode"/>
    <link:presentationArc order="11" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_EntityInformationLineItems_019e1801-31aa-7b60-8e3b-9e0204b9fc94" xlink:to="loc_dei_EntityAddressPostalZipCode_019e1801-31aa-70db-b74d-533ec84200df" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_CityAreaCode_019e1801-31aa-7e83-aaa7-83b5c1e2415f" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_CityAreaCode"/>
    <link:presentationArc order="12" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_EntityInformationLineItems_019e1801-31aa-7b60-8e3b-9e0204b9fc94" xlink:to="loc_dei_CityAreaCode_019e1801-31aa-7e83-aaa7-83b5c1e2415f" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LocalPhoneNumber_019e1801-31aa-788e-8f20-378bf6bc336f" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_LocalPhoneNumber"/>
    <link:presentationArc order="13" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_EntityInformationLineItems_019e1801-31aa-7b60-8e3b-9e0204b9fc94" xlink:to="loc_dei_LocalPhoneNumber_019e1801-31aa-788e-8f20-378bf6bc336f" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_Security12bTitle_019e1801-31aa-7770-a06b-ed16f6440b30" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_Security12bTitle"/>
    <link:presentationArc order="14" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_EntityInformationLineItems_019e1801-31aa-7b60-8e3b-9e0204b9fc94" xlink:to="loc_dei_Security12bTitle_019e1801-31aa-7770-a06b-ed16f6440b30" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_TradingSymbol_019e1801-31aa-79b0-9892-f6944baae5e8" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_TradingSymbol"/>
    <link:presentationArc order="15" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_EntityInformationLineItems_019e1801-31aa-7b60-8e3b-9e0204b9fc94" xlink:to="loc_dei_TradingSymbol_019e1801-31aa-79b0-9892-f6944baae5e8" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_NoTradingSymbolFlag_019e1801-31aa-7d05-8a0d-cc92eb025471" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_NoTradingSymbolFlag"/>
    <link:presentationArc order="16" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_EntityInformationLineItems_019e1801-31aa-7b60-8e3b-9e0204b9fc94" xlink:to="loc_dei_NoTradingSymbolFlag_019e1801-31aa-7d05-8a0d-cc92eb025471" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_SecurityExchangeName_019e1801-31aa-7781-8d5d-2f3f545e5967" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_SecurityExchangeName"/>
    <link:presentationArc order="17" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_EntityInformationLineItems_019e1801-31aa-7b60-8e3b-9e0204b9fc94" xlink:to="loc_dei_SecurityExchangeName_019e1801-31aa-7781-8d5d-2f3f545e5967" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_WrittenCommunications_019e1801-31aa-7aa7-b57f-3109b7d61d4d" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_WrittenCommunications"/>
    <link:presentationArc order="18" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_EntityInformationLineItems_019e1801-31aa-7b60-8e3b-9e0204b9fc94" xlink:to="loc_dei_WrittenCommunications_019e1801-31aa-7aa7-b57f-3109b7d61d4d" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_SolicitingMaterial_019e1801-31aa-7e72-8c0b-9182eab9d916" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_SolicitingMaterial"/>
    <link:presentationArc order="19" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_EntityInformationLineItems_019e1801-31aa-7b60-8e3b-9e0204b9fc94" xlink:to="loc_dei_SolicitingMaterial_019e1801-31aa-7e72-8c0b-9182eab9d916" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_PreCommencementTenderOffer_019e1801-31aa-74d9-9e28-eff3ee2968bc" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_PreCommencementTenderOffer"/>
    <link:presentationArc order="20" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_EntityInformationLineItems_019e1801-31aa-7b60-8e3b-9e0204b9fc94" xlink:to="loc_dei_PreCommencementTenderOffer_019e1801-31aa-74d9-9e28-eff3ee2968bc" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_PreCommencementIssuerTenderOffer_019e1801-31aa-7460-8c7a-caf323138279" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_PreCommencementIssuerTenderOffer"/>
    <link:presentationArc order="21" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_EntityInformationLineItems_019e1801-31aa-7b60-8e3b-9e0204b9fc94" xlink:to="loc_dei_PreCommencementIssuerTenderOffer_019e1801-31aa-7460-8c7a-caf323138279" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityEmergingGrowthCompany_019e1801-31aa-76a8-80d9-c4d996600704" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_EntityEmergingGrowthCompany"/>
    <link:presentationArc order="22" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_EntityInformationLineItems_019e1801-31aa-7b60-8e3b-9e0204b9fc94" xlink:to="loc_dei_EntityEmergingGrowthCompany_019e1801-31aa-76a8-80d9-c4d996600704" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityCentralIndexKey_019e1801-31aa-7044-ac5a-60723a543f31" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_EntityCentralIndexKey"/>
    <link:presentationArc order="23" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_EntityInformationLineItems_019e1801-31aa-7b60-8e3b-9e0204b9fc94" xlink:to="loc_dei_EntityCentralIndexKey_019e1801-31aa-7044-ac5a-60723a543f31" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_AmendmentFlag_019e1801-31aa-741e-b1d9-e1c983145b24" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_AmendmentFlag"/>
    <link:presentationArc order="24" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_EntityInformationLineItems_019e1801-31aa-7b60-8e3b-9e0204b9fc94" xlink:to="loc_dei_AmendmentFlag_019e1801-31aa-741e-b1d9-e1c983145b24" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_NoTradingSymbolFlag_019e1801-31aa-74e8-921b-2d6179abe0dd" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_NoTradingSymbolFlag"/>
    <link:presentationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019e1801-31aa-7664-a7e3-675ccfc3b7b7" xlink:to="loc_dei_NoTradingSymbolFlag_019e1801-31aa-74e8-921b-2d6179abe0dd" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
  </link:presentationLink>
</link:linkbase>
