<?xml version="1.0" encoding="UTF-8"?>
<edgarSubmission xmlns:ns1="http://www.sec.gov/edgar/common" xmlns="http://www.sec.gov/edgar/thirteenffiler">
  <schemaVersion>X0202</schemaVersion>
  <headerData>
    <submissionType>13F-HR</submissionType>
    <filerInfo>
      <liveTestFlag>LIVE</liveTestFlag>
      <flags>
        <confirmingCopyFlag>false</confirmingCopyFlag>
        <returnCopyFlag>false</returnCopyFlag>
        <overrideInternetFlag>false</overrideInternetFlag>
      </flags>
      <filer>
        <credentials>
          <cik>0001304229</cik>
          <ccc>XXXXXXXX</ccc>
        </credentials>
      </filer>
      <periodOfReport>09-30-2025</periodOfReport>
    </filerInfo>
  </headerData>
  <formData>
    <coverPage>
      <reportCalendarOrQuarter>09-30-2025</reportCalendarOrQuarter>
      <isAmendment>false</isAmendment>
      <filingManager>
        <name>SeaBridge Investment Advisors LLC</name>
        <address>
          <ns1:street1>450 SPRINGFIELD AVENUE, SUITE 301</ns1:street1>
          <ns1:city>SUMMIT</ns1:city>
          <ns1:stateOrCountry>NJ</ns1:stateOrCountry>
          <ns1:zipCode>07901-2610</ns1:zipCode>
        </address>
      </filingManager>
      <reportType>13F HOLDINGS REPORT</reportType>
      <form13FFileNumber>028-12671</form13FFileNumber>
      <crdNumber>000108681</crdNumber>
      <secFileNumber>801-55009</secFileNumber>
      <provideInfoForInstruction5>N</provideInfoForInstruction5>
    </coverPage>
    <signatureBlock>
      <name>Alex Butters</name>
      <title>Regulatory Consultant</title>
      <phone>310-275-7300</phone>
      <signature>/s/Alex Butters</signature>
      <city>Beverly Hills</city>
      <stateOrCountry>CA</stateOrCountry>
      <signatureDate>10-22-2025</signatureDate>
    </signatureBlock>
    <summaryPage>
      <otherIncludedManagersCount>0</otherIncludedManagersCount>
      <tableEntryTotal>203</tableEntryTotal>
      <tableValueTotal>616228567</tableValueTotal>
      <isConfidentialOmitted>false</isConfidentialOmitted>
    </summaryPage>
  </formData>
</edgarSubmission>
