Lake Havasu, Az-CA — storage

Storage now, against this reservoir's own record

722.53 Mm³

Stored, August 2026

56th

Percentile among 89 Augs on record

+0.4%

Against the Aug 1991–2020 average

+0.5%

Change over the 12 months to 2026-08

Storage in August 2026 was around the middle of the Aug record, ranked against 89 other Augs held for this reservoir.

Storage, 1938–2026

Monthly mean storage

1,058 monthly values, 1938 to 2026

Monthly means of the publisher's daily record. Volume, not percentage of capacity: without a capacity whose definition is stated, fullness cannot be computed.

View the data behind this chart

Underlying data
Period	Lake Havasu Near Parker Dam, Az-CA (Mm³)
July 1938	37.0
August 1938	35.8
September 1938	32.2
October 1938	91.5
November 1938	496
December 1938	598
January 1939	598
February 1939	589
March 1939	581
April 1939	588
May 1939	592
June 1939	590
July 1939	592
August 1939	591
September 1939	658
October 1939	635
November 1939	648
December 1939	638
January 1940	640
February 1940	629
March 1940	617
April 1940	627
May 1940	630
June 1940	612
July 1940	590
August 1940	591
September 1940	593
October 1940	568
November 1940	558
December 1940	531
January 1941	498
February 1941	511
March 1941	506
April 1941	491
May 1941	483
June 1941	459
July 1941	559
August 1941	559
September 1941	545
October 1941	527
November 1941	513
December 1941	512
January 1942	502
February 1942	512
March 1942	563
April 1942	546
May 1942	421
June 1942	108
July 1942	141
August 1942	158
September 1942	194
October 1942	592
November 1942	701
December 1942	678
January 1943	669
February 1943	735
March 1943	816
April 1943	843
May 1943	845
June 1943	838
July 1943	840
August 1943	823
September 1943	804
October 1943	792
November 1943	763
December 1943	737
January 1944	719
February 1944	723
March 1944	754
April 1944	744
May 1944	702
June 1944	814
July 1944	839
August 1944	834
September 1944	792
October 1944	757
November 1944	730
December 1944	718
January 1945	722
February 1945	723
March 1945	751
April 1945	784
May 1945	802
June 1945	801
July 1945	801
August 1945	799
September 1945	789
October 1945	781
November 1945	754
December 1945	745
January 1946	722
February 1946	731
March 1946	753
April 1946	833
May 1946	830
June 1946	834
July 1946	834
August 1946	829
September 1946	796
October 1946	807
November 1946	813
December 1946	772
January 1947	758
February 1947	767
March 1947	779
April 1947	803
May 1947	831
June 1947	829
July 1947	835
August 1947	810
September 1947	800
October 1947	774
November 1947	764
December 1947	745
January 1948	736
February 1948	725
March 1948	732
April 1948	776
May 1948	832
June 1948	827
July 1948	833
August 1948	809
September 1948	775
October 1948	773
November 1948	767
December 1948	742
January 1949	724
February 1949	699
March 1949	722
April 1949	775
May 1949	821
June 1949	829
July 1949	828
August 1949	805
September 1949	764
October 1949	761
November 1949	727
December 1949	802
January 1950	805
February 1950	770
March 1950	817
April 1950	807
May 1950	836
June 1950	836
July 1950	836
August 1950	667
September 1950	775
October 1950	765
November 1950	807
December 1950	764
January 1951	761
February 1951	764
March 1951	765
April 1951	790
May 1951	817
June 1951	805
July 1951	820
August 1951	806
September 1951	766
October 1951	749
November 1951	778
December 1951	750
January 1952	741
February 1952	739
March 1952	750
April 1952	777
May 1952	823
June 1952	828
July 1952	813
August 1952	777
September 1952	748
October 1952	745
November 1952	728
December 1952	722
January 1953	718
February 1953	730
March 1953	755
April 1953	793
May 1953	828
June 1953	831
July 1953	825
August 1953	787
September 1953	778
October 1953	781
November 1953	768
December 1953	744
January 1954	750
February 1954	753
March 1954	757
April 1954	794
May 1954	836
June 1954	837
July 1954	817
August 1954	788
September 1954	774
October 1954	778
November 1954	762
December 1954	757
January 1955	754
February 1955	754
March 1955	760
April 1955	811
May 1955	841
June 1955	823
July 1955	821
August 1955	798
September 1955	757
October 1955	763
November 1955	748
December 1955	748
January 1956	746
February 1956	752
March 1956	749
April 1956	797
May 1956	824
June 1956	826
July 1956	818
August 1956	789
September 1956	774
October 1956	700
November 1956	686
December 1956	679
January 1957	676
February 1957	681
March 1957	686
April 1957	724
May 1957	744
June 1957	734
July 1957	741
August 1957	708
September 1957	691
October 1957	696
November 1957	670
December 1957	664
January 1958	646
February 1958	673
March 1958	659
April 1958	702
May 1958	742
June 1958	751
July 1958	726
August 1958	712
September 1958	696
October 1958	691
November 1958	681
December 1958	675
January 1959	675
February 1959	674
March 1959	681
April 1959	716
May 1959	744
June 1959	738
July 1959	726
August 1959	694
September 1959	678
October 1959	685
November 1959	690
December 1959	684
January 1960	675
February 1960	669
March 1960	671
April 1960	698
May 1960	730
June 1960	731
July 1960	729
August 1960	710
September 1960	697
October 1960	684
November 1960	698
December 1960	690
January 1961	675
February 1961	668
March 1961	671
April 1961	716
May 1961	734
June 1961	743
July 1961	737
August 1961	722
September 1961	677
October 1961	688
November 1961	677
December 1961	692
January 1962	671
February 1962	675
March 1962	675
April 1962	714
May 1962	742
June 1962	736
July 1962	725
August 1962	706
September 1962	689
October 1962	688
November 1962	675
December 1962	676
January 1963	655
February 1963	663
March 1963	663
April 1963	715
May 1963	736
June 1963	738
July 1963	724
August 1963	699
September 1963	690
October 1963	684
November 1963	670
December 1963	664
January 1964	666
February 1964	662
March 1964	663
April 1964	707
May 1964	745
June 1964	736
July 1964	716
August 1964	692
September 1964	682
October 1964	684
November 1964	673
December 1964	667
January 1965	668
February 1965	657
March 1965	662
April 1965	675
May 1965	730
June 1965	741
July 1965	712
August 1965	687
September 1965	683
October 1965	687
November 1965	684
December 1965	686
January 1966	679
February 1966	665
March 1966	668
April 1966	690
May 1966	741
June 1966	747
July 1966	727
August 1966	702
September 1966	694
October 1966	688
November 1966	682
December 1966	672
January 1967	667
February 1967	662
March 1967	663
April 1967	712
May 1967	744
June 1967	744
July 1967	728
August 1967	705
September 1967	692
October 1967	678
November 1967	678
December 1967	679
January 1968	671
February 1968	665
March 1968	675
April 1968	716
May 1968	748
June 1968	751
July 1968	734
August 1968	711
September 1968	681
October 1968	689
November 1968	673
December 1968	664
January 1969	669
February 1969	668
March 1969	679
April 1969	718
May 1969	749
June 1969	751
July 1969	735
August 1969	708
September 1969	702
October 1969	689
November 1969	685
December 1969	675
January 1970	673
February 1970	672
March 1970	674
April 1970	691
May 1970	748
June 1970	754
July 1970	750
August 1970	733
September 1970	700
October 1970	682
November 1970	685
December 1970	674
January 1971	668
February 1971	669
March 1971	679
April 1971	719
May 1971	753
June 1971	751
July 1971	739
August 1971	731
September 1971	698
October 1971	693
November 1971	686
December 1971	673
January 1972	670
February 1972	673
March 1972	679
April 1972	719
May 1972	754
June 1972	748
July 1972	741
August 1972	730
September 1972	699
October 1972	692
November 1972	675
December 1972	666
January 1973	670
February 1973	677
March 1973	687
April 1973	714
May 1973	750
June 1973	753
July 1973	743
August 1973	734
September 1973	702
October 1973	688
November 1973	681
December 1973	682
January 1974	673
February 1974	676
March 1974	688
April 1974	719
May 1974	754
June 1974	754
July 1974	741
August 1974	714
September 1974	704
October 1974	693
November 1974	682
December 1974	667
January 1975	674
February 1975	681
March 1975	676
April 1975	713
May 1975	747
June 1975	751
July 1975	740
August 1975	716
September 1975	705
October 1975	689
November 1975	684
December 1975	679
January 1976	673
February 1976	682
March 1976	673
April 1976	711
May 1976	746
June 1976	752
July 1976	719
August 1976	690
September 1976	710
October 1976	699
November 1976	697
December 1976	683
January 1977	697
February 1977	675
March 1977	689
April 1977	720
May 1977	754
June 1977	754
July 1977	740
August 1977	726
September 1977	706
October 1977	698
November 1977	690
December 1977	680
January 1978	682
February 1978	670
March 1978	682
April 1978	715
May 1978	752
June 1978	756
July 1978	742
August 1978	707
September 1978	705
October 1978	702
November 1978	688
December 1978	685
January 1979	678
February 1979	652
March 1979	660
April 1979	665
May 1979	701
June 1979	699
July 1979	709
August 1979	709
September 1979	690
October 1979	700
November 1979	689
December 1979	683
January 1980	688
February 1980	677
March 1980	647
April 1980	698
May 1980	722
June 1980	721
July 1980	716
August 1980	679
September 1980	687
October 1980	687
November 1980	685
December 1980	696
January 1981	689
February 1981	682
March 1981	693
April 1981	728
May 1981	757
June 1981	755
July 1981	743
August 1981	717
September 1981	712
October 1981	696
November 1981	687
December 1981	680
January 1982	678
February 1982	676
March 1982	687
April 1982	725
May 1982	760
June 1982	761
July 1982	740
August 1982	725
September 1982	710
October 1982	692
November 1982	684
December 1982	695
January 1983	662
February 1983	681
March 1983	687
April 1983	684
May 1983	747
June 1983	735
July 1983	705
August 1983	683
September 1983	673
October 1983	672
November 1983	682
December 1983	663
January 1984	680
February 1984	689
March 1984	687
April 1984	691
May 1984	709
June 1984	687
July 1984	704
August 1984	721
September 1984	721
October 1984	686
November 1984	677
December 1984	700
January 1985	705
February 1985	678
March 1985	687
April 1985	703
May 1985	728
June 1985	732
July 1985	708
August 1985	702
September 1985	705
October 1985	684
November 1985	696
December 1985	701
January 1986	734
February 1986	726
March 1986	716
April 1986	698
May 1986	729
June 1986	691
July 1986	698
August 1986	727
September 1986	720
October 1986	685
November 1986	681
December 1986	704
January 1987	709
February 1987	678
March 1987	682
April 1987	711
May 1987	751
June 1987	759
July 1987	738
August 1987	715
September 1987	714
October 1987	711
November 1987	691
December 1987	688
January 1988	682
February 1988	682
March 1988	687
April 1988	720
May 1988	755
June 1988	748
July 1988	731
August 1988	736
September 1988	710
October 1988	700
November 1988	686
December 1988	691
January 1989	688
February 1989	676
March 1989	672
April 1989	711
May 1989	756
June 1989	755
July 1989	733
August 1989	716
September 1989	705
October 1989	689
November 1989	689
December 1989	672
January 1990	681
February 1990	669
March 1990	679
April 1990	732
May 1990	751
June 1990	732
July 1990	731
August 1990	724
September 1990	711
October 1990	690
November 1990	680
December 1990	673
January 1991	677
February 1991	677
March 1991	706
April 1991	726
May 1991	749
June 1991	747
July 1991	736
August 1991	719
September 1991	714
October 1991	684
November 1991	683
December 1991	690
January 1992	695
February 1992	681
March 1992	689
April 1992	724
May 1992	752
June 1992	750
July 1992	734
August 1992	726
September 1992	705
October 1992	669
November 1992	672
December 1992	676
January 1993	692
February 1993	726
March 1993	690
April 1993	718
May 1993	747
June 1993	748
July 1993	732
August 1993	723
September 1993	707
October 1993	701
November 1993	692
December 1993	675
January 1994	675
February 1994	681
March 1994	705
April 1994	707
May 1994	732
June 1994	741
July 1994	733
August 1994	697
September 1994	705
October 1994	693
November 1994	681
December 1994	702
January 1995	708
February 1995	705
March 1995	704
April 1995	696
May 1995	741
June 1995	746
July 1995	735
August 1995	717
September 1995	741
October 1995	736
November 1995	732
December 1995	684
January 1996	685
February 1996	690
March 1996	674
April 1996	689
May 1996	739
June 1996	736
July 1996	741
August 1996	726
September 1996	741
October 1996	720
November 1996	717
December 1996	686
January 1997	694
February 1997	728
March 1997	706
April 1997	712
May 1997	738
June 1997	747
July 1997	725
August 1997	717
September 1997	716
October 1997	704
November 1997	690
December 1997	707
January 1998	711
February 1998	698
March 1998	696
April 1998	710
May 1998	734
June 1998	729
July 1998	709
August 1998	739
September 1998	723
October 1998	670
November 1998	665
December 1998	740
January 1999	695
February 1999	651
March 1999	654
April 1999	713
May 1999	732
June 1999	752
July 1999	744
August 1999	738
September 1999	709
October 1999	699
November 1999	679
December 1999	683
January 2000	680
February 2000	668
March 2000	670
April 2000	677
May 2000	721
June 2000	738
July 2000	713
August 2000	714
September 2000	700
October 2000	712
November 2000	702
December 2000	678
January 2001	713
February 2001	686
March 2001	735
April 2001	727
May 2001	723
June 2001	712
July 2001	722
August 2001	716
September 2001	697
October 2001	707
November 2001	685
December 2001	680
January 2002	678
February 2002	686
March 2002	723
April 2002	726
May 2002	733
June 2002	730
July 2002	708
August 2002	697
September 2002	708
October 2002	726
November 2002	701
December 2002	685
January 2003	674
February 2003	672
March 2003	689
April 2003	704
May 2003	735
June 2003	734
July 2003	735
August 2003	736
September 2003	712
October 2003	709
November 2003	701
December 2003	681
January 2004	630
February 2004	664
March 2004	694
April 2004	692
May 2004	710
June 2004	727
July 2004	727
August 2004	719
September 2004	727
October 2004	734
November 2004	720
December 2004	714
January 2005	715
February 2005	721
March 2005	702
April 2005	697
May 2005	729
June 2005	728
July 2005	715
August 2005	730
September 2005	690
October 2005	703
November 2005	709
December 2005	704
January 2006	703
February 2006	692
March 2006	702
April 2006	693
May 2006	700
June 2006	688
July 2006	706
August 2006	707
September 2006	700
October 2006	696
November 2006	706
December 2006	700
January 2007	711
February 2007	681
March 2007	687
April 2007	689
May 2007	723
June 2007	728
July 2007	707
August 2007	723
September 2007	707
October 2007	705
November 2007	706
December 2007	708
January 2008	694
February 2008	681
March 2008	683
April 2008	684
May 2008	714
June 2008	736
July 2008	716
August 2008	696
September 2008	729
October 2008	694
November 2008	686
December 2008	707
January 2009	684
February 2009	695
March 2009	689
April 2009	709
May 2009	742
June 2009	734
July 2009	716
August 2009	705
September 2009	724
October 2009	691
November 2009	714
December 2009	700
January 2010	718
February 2010	714
March 2010	690
April 2010	713
May 2010	735
June 2010	734
July 2010	727
August 2010	726
September 2010	705
October 2010	726
November 2010	728
December 2010	709
January 2011	706
February 2011	713
March 2011	709
April 2011	720
May 2011	732
June 2011	727
July 2011	717
August 2011	721
September 2011	724
October 2011	710
November 2011	723
December 2011	695
January 2012	674
February 2012	719
March 2012	699
April 2012	722
May 2012	730
June 2012	723
July 2012	733
August 2012	730
September 2012	720
October 2012	721
November 2012	712
December 2012	694
January 2013	693
February 2013	722
March 2013	716
April 2013	705
May 2013	727
June 2013	725
July 2013	735
August 2013	728
September 2013	730
October 2013	703
November 2013	727
December 2013	673
January 2014	669
February 2014	687
March 2014	715
April 2014	717
May 2014	720
June 2014	728
July 2014	725
August 2014	736
September 2014	722
October 2014	726
November 2014	684
December 2014	702
January 2015	692
February 2015	696
March 2015	720
April 2015	711
May 2015	740
June 2015	737
July 2015	730
August 2015	715
September 2015	729
October 2015	721
November 2015	689
December 2015	685
January 2016	694
February 2016	685
March 2016	710
April 2016	724
May 2016	732
June 2016	735
July 2016	735
August 2016	726
September 2016	725
October 2016	717
November 2016	682
December 2016	684
January 2017	717
February 2017	720
March 2017	723
April 2017	718
May 2017	730
June 2017	723
July 2017	724
August 2017	724
September 2017	715
October 2017	710
November 2017	703
December 2017	683
January 2018	681
February 2018	695
March 2018	710
April 2018	696
May 2018	711
June 2018	725
July 2018	728
August 2018	706
September 2018	714
October 2018	729
November 2018	722
December 2018	715
January 2019	702
February 2019	714
March 2019	712
April 2019	707
May 2019	723
June 2019	725
July 2019	713
August 2019	712
September 2019	717
October 2019	724
November 2019	719
December 2019	737
January 2020	696
February 2020	698
March 2020	722
April 2020	704
May 2020	702
June 2020	720
July 2020	712
August 2020	714
September 2020	705
October 2020	714
November 2020	710
December 2020	687
January 2021	693
February 2021	700
March 2021	703
April 2021	700
May 2021	729
June 2021	729
July 2021	722
August 2021	720
September 2021	717
October 2021	727
November 2021	705
December 2021	695
January 2022	688
February 2022	692
March 2022	706
April 2022	706
May 2022	717
June 2022	731
July 2022	729
August 2022	732
September 2022	716
October 2022	718
November 2022	702
December 2022	694
January 2023	711
February 2023	704
March 2023	713
April 2023	711
May 2023	713
June 2023	714
July 2023	718
August 2023	723
September 2023	715
October 2023	721
November 2023	714
December 2023	691
January 2024	706
February 2024	706
March 2024	698
April 2024	711
May 2024	718
June 2024	724
July 2024	728
August 2024	724
September 2024	714
October 2024	698
November 2024	709
December 2024	700
January 2025	682
February 2025	690
March 2025	707
April 2025	712
May 2025	727
June 2025	731
July 2025	725
August 2025	719
September 2025	724
October 2025	710
November 2025	726
December 2025	701
January 2026	701
February 2026	694
March 2026	700
April 2026	716
May 2026	728
June 2026	727
July 2026	727
August 2026	723

The reservoir's year

Seasonal storage profile

Each calendar month's reference average, against the most recent year

1991–2020 average
Most recent 12 months

Twelve separate averages, one per calendar month. A January average describes Januaries only. Months are plotted 1–12.

View the data behind this chart

Underlying data
Period	1991–2020 average (Mm³)	Most recent 12 months (Mm³)
Jan	692	701
Feb	695	694
Mar	701	700
Apr	708	716
May	729	728
Jun	732	727
Jul	724	727
Aug	719	723
Sep	715	724
Oct	708	710
Nov	701	726
Dec	695	701

Rate and persistence

+0.29 Mm³

Mean change per month over 12 months

0 of 24

Months in the last two years below the 20th percentile for their own month

Rates are computed only across an unbroken run of months, so a rate is never divided by a period in which some of the change was not observed. Percentile counts compare each month with the same calendar month in every other year held.

Location

Lake Havasu Near Parker Dam, Az-CA

Gauge location

Where this comes from

1,058 monthly observations 1938–2026 Mm³

Spatially aggregatedHigh confidenceAugust 2026

Source: USGS — National Water Information System, 09427500. Licence: Open.

Method: Monthly mean of daily reservoir storage published by the USGS in acre-feet and converted to millions of cubic metres. Months with fewer than 20 days of record are not published rather than averaged from a partial month.

Reservoir storage is managed as well as observed: a drawdown may reflect an operating rule, flood-control rule curve or scheduled release rather than a shortage. Compare a month against the same month in other years, and do not read a fall as a supply signal without knowing the operating regime.

Retrieved 25 August 2026.

Monthly mean of daily reservoir storage published by the USGS in acre-feet and converted to millions of cubic metres. Months with fewer than 20 days of record are not published rather than averaged from a partial month.

Period	1991–2020 average (Mm³)	Most recent 12 months (Mm³)
Jan	692	701
Feb	695	694
Mar	701	700
Apr	708	716
May	729	728
Jun	732	727
Jul	724	727
Aug	719	723
Sep	715	724
Oct	708	710
Nov	701	726
Dec	695	701

Period	1991–2020 average (Mm³)	Most recent 12 months (Mm³)
Jan	692	701
Feb	695	694
Mar	701	700
Apr	708	716
May	729	728
Jun	732	727
Jul	724	727
Aug	719	723
Sep	715	724
Oct	708	710
Nov	701	726
Dec	695	701

Period	1991–2020 average (Mm³)	Most recent 12 months (Mm³)
Jan	692	701
Feb	695	694
Mar	701	700
Apr	708	716
May	729	728
Jun	732	727
Jul	724	727
Aug	719	723
Sep	715	724
Oct	708	710
Nov	701	726
Dec	695	701