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Tide Gauge Details - New Zealand - Manakau

Device description

Name
New Zealand - Manakau
Country
New Zealand
Group
TD UNESCO
Lat/Lon
-37.047001 / 174.511993

Last measured values

Time(UTC)
24 Jun 2026 06:58:00
Latency
5966
Level
4.09

Harmonics

Points count
6735556
First date
29 Apr 2011 19:07
Last date
25 Feb 2026 21:58

Click on following link to see data:

Harmonics Constatns
Comp # Period (day) Cos factor (m) Sin factor (m)
0 0.00000 2.91122E+0 0E+0
1 0.12877 -4.62091E-5 -1.00466E-4
2 0.12886 2.08302E-5 4.35652E-4
3 0.12938 8.76698E-4 -5.19938E-4
4 0.14707 -1.45391E-4 9.65067E-5
5 0.16841 7.19911E-4 5.55743E-4
6 0.16857 -4.72857E-4 -1.64293E-3
7 0.17036 2.08093E-3 -1.39066E-3
8 0.17052 -6.84595E-3 2.79773E-3
9 0.17251 4.6078E-3 6.14276E-3
10 0.17470 -8.59966E-4 -8.73051E-4
11 0.19989 -1.27162E-4 5.59029E-4
12 0.20545 -1.20214E-3 3.2479E-4
13 0.24966 -5.31149E-5 9.13285E-4
14 0.25000 1.47461E-3 2.57495E-4
15 0.25395 -1.25229E-3 -1.99957E-3
16 0.25431 2.32675E-3 6.58955E-3
17 0.25631 -3.68572E-4 2.65534E-4
18 0.25667 7.08761E-4 -1.78153E-4
19 0.25876 1.37639E-2 -6.85018E-3
20 0.26122 -3.68692E-3 -3.11742E-3
21 0.33303 9.97529E-4 -5.70349E-3
22 0.34071 1.07502E-4 3.95034E-4
23 0.34135 -1.70104E-3 -1.15248E-4
24 0.34502 -1.66077E-3 2.87364E-3
25 0.34943 1.38474E-3 -4.63375E-4
26 0.48977 -1.96921E-3 -2.83294E-3
27 0.49109 -2.79337E-3 -5.88811E-3
28 0.49863 -5.49153E-2 5.79852E-2
29 0.49932 -4.68941E-3 4.89546E-3
30 0.50000 2.51664E-1 -1.30866E-1
31 0.50798 -3.54056E-2 2.08102E-2
32 0.50924 1.42285E-2 4.85026E-3
33 0.51606 -5.63569E-3 -7.51269E-4
34 0.51679 -5.65098E-4 5.58442E-3
35 0.51753 -5.12152E-1 -9.52335E-1
36 0.51826 9.50912E-3 -7.32566E-4
37 0.52608 -1.68365E-2 -3.87852E-2
38 0.52743 -1.69388E-1 1.1024E-1
39 0.53632 -2.4343E-2 -1.06769E-2
40 0.53772 1.82151E-2 2.08005E-2
41 0.54697 -1.38769E-3 4.76127E-3
42 0.54843 1.2784E-3 -2.23357E-3
43 0.89909 1.00277E-4 4.96512E-4
44 0.92942 1.82749E-3 -1.74064E-3
45 0.93417 2.61173E-4 4.21906E-4
46 0.96244 -1.44064E-4 4.28785E-3
47 0.96696 -4.2734E-4 4.14879E-4
48 0.99185 3.62414E-4 -1.04124E-3
49 0.99455 3.32991E-4 -1.22878E-3
50 0.99727 5.46785E-2 9.08447E-3
51 1.00000 -1.2002E-3 6.73161E-3
52 1.00275 1.49373E-2 6.12544E-3
53 1.00551 1.23676E-3 2.23271E-3
54 1.02954 4.17462E-4 5.66589E-4
55 1.03472 -3.13706E-4 -8.01803E-4
56 1.04061 1.0795E-3 -4.40703E-4
57 1.06951 -2.03274E-4 3.22712E-4
58 1.07581 -6.6704E-3 -1.23239E-2
59 1.11346 -8.56638E-4 2.30324E-4
60 1.11951 6.78663E-5 5.38104E-3
61 1.16035 -5.2519E-4 1.58881E-4
62 1.16693 1.40781E-3 2.31087E-4
63 1.21136 9.00382E-4 3.33258E-4
64 13.66079 8.10443E-3 -1.64476E-2
65 14.76529 -2.83057E-2 1.74659E-3
66 27.55455 -1.7917E-3 7.45414E-3
67 31.81193 3.13738E-2 1.91141E-2
68 182.62118 5.99439E-3 -5.15769E-2
69 365.25998 -4.81289E-2 -2.58351E-2
Mathematical Formula
Tide calculation mathematical formula
Visual Basic Syntax
Function EstimateTideValues() As [Function]
                        Dim Pi As [Double] = Math.PI
                        Dim sum As [Double] = harmonics(0, 1)
                        For k As Int16 = 1 To harmonics.GetUpperBound(0)
                        Dim period As [Double] = 2 * Pi / harmonics(k, 0)
                        Dim coefCos As [Double] = harmonics(k, 1)
                        Dim coefSin As [Double] = harmonics(k, 2) 
                        sum = sum + coefCos * Math.Cos(time * period)
                        sum = sum + coefSin * Math.Sin(time * period)
                        Next
                        Return sum
                        End Function
C# Syntax
double EstimateTideValues()
                        {
                        double Pi = Math.PI;
                        double sum = harmonics[0, 1];
                        for (int k=1; k <= harmonics.GetUpperBound(0); k++)
                        {
                        double period = 2 * Pi / harmonics[k, 0];
                        double coefCos = harmonics[k, 1];
                        double coefSin = harmonics[k, 2];
                        sum += coefCos * Math.Cos(time * period);
                        sum += coefSin * Math.Sin(time * period);
                        }
                        return sum;
                        }

Axis ranges

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