Very high tide dates (red-alert) with increased coastal inundation potential
and carefree low high-tide dates for Christchurch
2017
Mo
Tu
We
January
Th
2
9
16
23
30
3
10
17
24
31
4
11
18
25
5
12
19
26
6
13
20
27
Mo
Tu
We
April
Th
Fr
3
10
17
24
4
11
18
25
5
12
19
26
Mo
Tu
3
10
17
24
31
Fr
Sa
Mo
Tu
7
14
21
28
Su
1
8
15
22
29
6
13
20
27
7
14
21
28
Sa
1
8
15
22
29
Su
2
9
16
23
30
Mo
1
8
15
22
29
Tu
2
9
16
23
30
We
3
10
17
24
31
Su
2
9
16
23
30
Mo
7
14
21
28
Tu
1
8
15
22
29
We
2
9
16
23
30
Su
1
8
15
22
29
Mo
Tu
6
13
20
27
7
14
21
28
We
1
8
15
22
29
7
14
21
28
We
6
13
20
27
July
Th
4
11
18
25
5
12
19
26
6
13
20
27
7
14
21
28
Sa
1
8
15
22
29
Mo
Tu
We
October
Th
Fr
Sa
2
9
16
23
30
3
10
17
24
31
4
11
18
25
5
12
19
26
6
13
20
27
7
14
21
28
=
=
Fr
red alert tide dates (highest perigean-spring high tides)
carefree tide dates (lowest neap high tides)
We
1
8
15
22
=
February
Th
2
9
16
23
Fr
3
10
17
24
Sa
4
11
18
25
Su
5
12
19
26
Mo
Tu
6
13
20
27
7
14
21
28
We
1
8
15
22
29
May
Th
4
11
18
25
Fr
5
12
19
26
Sa
6
13
20
27
Su
7
14
21
28
Mo
Tu
We
5
12
19
26
6
13
20
27
7
14
21
28
August
Th
3
10
17
24
31
Fr
4
11
18
25
Sa
5
12
19
26
Su
6
13
20
27
Mo
Tu
We
June
Th
1
8
15
22
29
September
Th
4
11
18
25
5
12
19
26
6
13
20
27
7
14
21
28
November
Th
2
9
16
23
30
Fr
3
10
17
24
Sa
4
11
18
25
Su
5
12
19
26
Mo
Tu
We
December
Th
4
11
18
25
5
12
19
26
6
13
20
27
7
14
21
28
highest red alert tide dates
March
Th
2
9
16
23
30
Fr
3
10
17
24
31
Sa
4
11
18
25
Su
5
12
19
26
Fr
2
9
16
23
30
Sa
3
10
17
24
Su
4
11
18
25
Fr
1
8
15
22
29
Sa
2
9
16
23
30
Su
3
10
17
24
Fr
1
8
15
22
29
Sa
2
9
16
23
30
Su
3
10
17
24
31