<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2021-12-06</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000105418</issuerCik>
        <issuerName>WEIS MARKETS INC</issuerName>
        <issuerTradingSymbol>WMK</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001553885</rptOwnerCik>
            <rptOwnerName>Lauth Edward John III</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>485 SCENERY DRIVE</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>STATE COLLEGE</rptOwnerCity>
            <rptOwnerState>PA</rptOwnerState>
            <rptOwnerZipCode>16801</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2021-12-06</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>W</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>2000</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>0</value>
                    <footnoteId id="F1"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">The shares previously shown for the reporting person were held by his wife, who passed away in October 2021. Her shares were transferred to her estate and the estate sold the shares in December 2021 in transactions that were exempt under Section 16. The shares were not distributed to or purchased by the reporting person.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/ Edward J. Lauth III</signatureName>
        <signatureDate>2023-02-10</signatureDate>
    </ownerSignature>
</ownershipDocument>
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X0306
4
2021-12-06
0
0000105418
WEIS MARKETS INC
WMK
0001553885
Lauth Edward John III
485 SCENERY DRIVE
STATE COLLEGE
PA
16801
1
0
0
0
Common Stock
2021-12-06
4
W
0
2000
0
D
0
D
The shares previously shown for the reporting person were held by his wife, who passed away in October 2021. Her shares were transferred to her estate and the estate sold the shares in December 2021 in transactions that were exempt under Section 16. The shares were not distributed to or purchased by the reporting person.
/s/ Edward J. Lauth III
2023-02-10