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

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2015-09-22</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001084597</issuerCik>
        <issuerName>XZERES Corp.</issuerName>
        <issuerTradingSymbol>XPWR</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001598555</rptOwnerCik>
            <rptOwnerName>DEBRUCE PAUL</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>411 NICHOLS ROAD</rptOwnerStreet1>
            <rptOwnerStreet2>SUITE 217</rptOwnerStreet2>
            <rptOwnerCity>KANSAS CITY</rptOwnerCity>
            <rptOwnerState>MO</rptOwnerState>
            <rptOwnerZipCode>64112</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock, par value $.001 per share</value>
            </securityTitle>
            <transactionDate>
                <value>2015-09-22</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>P</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>1498594</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0.072</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>16718266</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Series B Participating Preferred, par value $.001 per share</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>1190</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <derivativeTable>
        <derivativeHolding>
            <securityTitle>
                <value>Warrants (right to buy)</value>
                <footnoteId id="F1"/>
                <footnoteId id="F2"/>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>0.2344</value>
            </conversionOrExercisePrice>
            <exerciseDate>
                <value>2013-07-31</value>
            </exerciseDate>
            <expirationDate>
                <value>2017-07-31</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>976658</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>976658</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeHolding>
        <derivativeHolding>
            <securityTitle>
                <value>Warrants (right to buy)</value>
                <footnoteId id="F1"/>
                <footnoteId id="F3"/>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>0.2539</value>
            </conversionOrExercisePrice>
            <exerciseDate>
                <value>2013-10-01</value>
            </exerciseDate>
            <expirationDate>
                <value>2017-10-01</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>687047</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>687047</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeHolding>
        <derivativeHolding>
            <securityTitle>
                <value>Warrants (right to buy)</value>
                <footnoteId id="F1"/>
                <footnoteId id="F4"/>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>0.3062</value>
            </conversionOrExercisePrice>
            <exerciseDate>
                <value>2013-12-16</value>
            </exerciseDate>
            <expirationDate>
                <value>2016-12-16</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>2794256</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>2794256</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeHolding>
        <derivativeHolding>
            <securityTitle>
                <value>Warrants (right to buy)</value>
                <footnoteId id="F1"/>
                <footnoteId id="F5"/>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>0.2963</value>
            </conversionOrExercisePrice>
            <exerciseDate>
                <value>2014-04-23</value>
            </exerciseDate>
            <expirationDate>
                <value>2018-04-23</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>1144984</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>1144984</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeHolding>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">The number of shares to which these warrants relate, as well as their respective exercise prices, are subject to anti-dilution adjustment provisions.</footnote>
        <footnote id="F2">This warrant is exercisable for such number of shares as equals 1.03459% of the fully diluted outstanding shares of Common Stock upon payment of an aggregate exercise price of $228,951, and previously was reported as relating to 829,246 shares.  After giving effect to the warrant's anti-dilution provisions, as of July 15, 2015, the warrant is exercisable for a total of approximately 976,658 shares of Common Stock upon payment of an aggregate exercise price of $228,951 ($0.2344 per share), subject to further adjustment under the warrant's anti-dilution provisions.</footnote>
        <footnote id="F3">This warrant is exercisable for such number of shares as equals 0.7278% of the fully diluted outstanding shares of Common Stock upon payment of an aggregate exercise price of $174,417, and previously was reported as relating to 583,347 shares.  After giving effect to the warrant's anti-dilution provisions, as of July 15, 2015, the warrant is exercisable for a total of approximately 687,047 shares of Common Stock upon payment of an aggregate exercise price of $174,417 ($0.2539 per share), subject to further adjustment under the warrant's anti-dilution provisions.</footnote>
        <footnote id="F4">This warrant is exercisable for such number of shares as equals 2.96% of the fully diluted outstanding shares of Common Stock upon payment of an aggregate exercise price of $855,555, and previously was reported as relating to 2,372,503 shares.  After giving effect to the warrant's anti-dilution provisions, as of July 15, 2015, the warrant is exercisable for a total of approximately 2,794,256 shares of Common Stock upon payment of an aggregate exercise price of $855,555 ($0.3062 per share), subject to further adjustment under the warrant's anti-dilution provisions.</footnote>
        <footnote id="F5">This warrant is exercisable for such number of shares as equals 1.2129% of the fully diluted outstanding shares of Common Stock upon payment of an aggregate exercise price of $339,206, and previously was reported as relating to 972,165 shares.  After giving effect to the warrant's anti-dilution provisions, as of July 15, 2015, the warrant is exercisable for a total of approximately 1,144,984 shares of Common Stock upon payment of an aggregate exercise price of $339,206 ($0.2963 per share), subject to further adjustment under the warrant's anti-dilution provisions.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/Paul DeBruce</signatureName>
        <signatureDate>2015-09-24</signatureDate>
    </ownerSignature>
</ownershipDocument>
