Spring Tides at Surville

Spring tide schedule and tidal coefficients

Spring Tides at Surville

Spring tides at Surville in Normandy are among the most impressive natural phenomena on the coast. When the tidal coefficient exceeds 90, the sea retreats much further than usual at low tide, then surges back with considerable force at high tide, amplifying the 6.3m average tidal range.

These exceptional tides follow a predictable cycle tied to the alignment of the Sun, Earth, and Moon. Our spring tide calendar for Surville lets you plan ahead — whether for shore fishing, coastal walks, or simply watching the spectacle. Always prioritise safety during these powerful tidal events.

Sunday 18 October 2026

Click on a date in the calendar to see detailed tide times.

MORNING
00:28
▲ High tide
7,37 m Coef 34
06:52
▼ Low tide
4,21 m
AFTERNOON & EVENING
12:41
▲ High tide
7,35 m Coef 26
19:30
▼ Low tide
4,30 m

Spring tides 2026-2027 at Surville: dates and times

Until the end of 2027, Surville will see 18 more spring tide periods, 76 days in all with a coefficient of 90 or more. The strongest: Thursday 2 September 2027, coefficient 113, with high water at 21:57 (10.71 m) and low water at 16:17 (0.71 m).

PeriodMax coef. Highest high waterLowest daylight low water
Sun 25 Oct – Thu 29 Oct 98 10.25 m Wed 28 Oct, 08:47 1.28 m Tue 27 Oct, 14:43
Tue 24 Nov – Fri 27 Nov 97 10.20 m Thu 26 Nov, 08:30 1.33 m Thu 26 Nov, 15:14
Thu 24 Dec – Mon 28 Dec 102 10.16 m Sat 26 Dec, 09:07 1.09 m Sat 26 Dec, 15:58
2027
Fri 22 Jan – Tue 26 Jan 109 10.37 m Sun 24 Jan, 08:58 0.67 m Sun 24 Jan, 15:45
Sat 20 Feb – Thu 25 Feb 112 10.52 m Mon 22 Feb, 08:41 0.48 m Mon 22 Feb, 15:23
Tue 9 Mar – Thu 11 Mar 94 9.86 m Wed 10 Mar, 08:56 1.35 m Wed 10 Mar, 15:33
Sun 21 Mar – Thu 25 Mar 108 10.41 m Tue 23 Mar, 08:16 0.68 m Tue 23 Mar, 14:55
Wed 7 Apr – Fri 9 Apr 95 9.94 m Thu 8 Apr, 21:50 1.32 m Thu 8 Apr, 16:08
Mon 19 Apr – Thu 22 Apr 97 9.96 m Wed 21 Apr, 08:50 1.21 m Tue 20 Apr, 14:47
Thu 6 May – Sat 8 May 94 9.94 m Fri 7 May, 21:29 1.50 m Fri 7 May, 15:46
Sat 5 Jun – Mon 7 Jun 95 9.93 m Sun 6 Jun, 21:56 1.61 m Sun 6 Jun, 16:19
Sun 4 Jul – Thu 8 Jul 103 10.16 m Tue 6 Jul, 22:34 1.29 m Tue 6 Jul, 16:58
Mon 2 Aug – Fri 6 Aug 111 10.53 m Wed 4 Aug, 22:19 0.89 m Wed 4 Aug, 16:41
Mon 30 Aug – Sat 4 Sep 113 10.71 m Thu 2 Sep, 21:57 0.71 m Thu 2 Sep, 16:17
Tue 28 Sep – Sun 3 Oct 109 10.57 m Thu 30 Sep, 20:51 0.89 m Fri 1 Oct, 15:50
Sun 17 Oct 90 9.85 m Sun 17 Oct, 09:29 1.70 m Sun 17 Oct, 16:04
Thu 28 Oct – Sun 31 Oct 98 10.15 m Fri 29 Oct, 20:26 1.36 m Sat 30 Oct, 15:25
Wed 15 Dec – Fri 17 Dec 94 9.99 m Thu 16 Dec, 09:18 1.38 m Thu 16 Dec, 16:07

The lowest daylight low waters, the best for shore fishing: Sun 21 Feb at 14:42 (0.65 m), Mon 22 Feb at 15:23 (0.48 m), Tue 23 Feb at 16:01 (0.62 m).

At Surville, the difference between high and low water reaches 10.26 m during the strongest tides before the end of 2027, against about 2.20 m at neap tides.

Times and heights computed by MaréeFrance for Surville from the harmonic constants of the Dielette tide gauge, 34 km away (TICON-4), in French local time. Coefficients computed for the reference port of Brest.

All About Spring Tides

What is a Spring Tide?

A spring tide occurs when the Sun, Earth, and Moon are aligned (at new moon and full moon), combining their gravitational forces. This alignment amplifies the tidal range: high tides are higher and low tides are lower than normal. A spring tide is defined by a tidal coefficient of 90 or above (on a scale of 20 to 120). The strongest spring tides, with coefficients above 100, occur during the equinoxes in March and September.

Activities During Spring Tides

  • Shore fishing — Spring tides at Surville expose the largest foreshore area, revealing shellfish beds and rock pools normally underwater. Prime conditions for experienced foragers.
  • Coastal photography — The dramatic contrast between high and low water offers spectacular photo opportunities. Capture the vast exposed seabed or the power of the returning tide.
  • Nature walks — Low spring tides reveal rock formations, pools teeming with marine life, and sand flats stretching to the horizon. Always keep one eye on the tide schedule.
  • Surfing & water sports — Spring tides generate stronger currents and more powerful waves. Experienced surfers often find excellent conditions, but beginners should avoid these periods.

Understanding Tidal Coefficients

The tidal coefficient indicates the strength of a tide on a scale from 20 to 120. It is calculated by the French Hydrographic Service (SHOM) and determines the expected tidal range for each day:

  • 20-40 (Neap tides) — Minimal tidal range, gentle currents. Calm conditions for most water activities.
  • 41-69 (Average tides) — Moderate tidal movements. Standard conditions for coastal activities.
  • 70-89 (Strong tides) — Significant tidal range. Increased currents — check tide times carefully.
  • 90-100 (Spring tides) — Large tidal amplitude. Extensive foreshore exposed at low tide. Strong currents — caution required.
  • 101-120 (Exceptional spring tides) — Maximum tidal range. Very strong currents and rapid water movement. Heightened safety awareness essential.

Safety During Spring Tides

Spring tides at Surville demand heightened vigilance. The larger tidal range means faster-moving water and stronger currents. Follow these safety rules:

  • Check tide times before any excursion — Know exactly when the tide turns. Never venture onto the foreshore without consulting the schedule first.
  • Never turn your back on the sea — The incoming tide can surge in faster than you can walk, especially around rocks and in gullies.
  • Keep your phone charged and accessible — In case of emergency, call 196 (sea rescue) or 112 (European emergency number).
  • Inform someone of your plans — Tell someone where you are going and when you expect to return.
  • Watch for waves near sea walls — During spring tides, waves can overtop harbour walls and coastal defences without warning.
  • Supervise children closely — The foreshore can seem like a vast playground at low tide, but it becomes a dangerous trap when the water returns.
Click on a date to see tide times
October 2026
18
S
34
26
19
M
27
24
20
T
29
21
W
32
41
22
T
46
55
23
F
60
69
24
S
74
81
25
S
86
91
26
M
94
97
27
T
98
98
28
W
98
94
29
T
92
85
30
F
82
73
31
S
70
59
November 2026
01
S
58
49
02
M
50
44
03
T
50
48
04
W
57
05
T
58
67
06
F
69
76
07
S
77
82
08
S
83
85
09
M
85
85
10
T
84
81
11
W
81
76
12
T
75
69
13
F
68
60
14
S
59
51
15
S
50
42
16
M
42
34
17
T
36
31
18
W
35
34
19
T
41
20
F
44
51
21
S
55
63
22
S
68
74
23
M
80
84
24
T
89
91
25
W
95
94
26
T
97
93
27
F
95
88
28
S
89
79
29
S
79
69
30
M
69
59
December 2026
01
T
60
51
02
W
54
49
03
T
54
04
F
52
58
05
S
58
63
06
S
65
67
07
M
70
70
08
T
73
72
09
W
75
72
10
T
74
70
11
F
73
68
12
S
70
64
13
S
66
59
14
M
60
54
15
T
55
48
16
W
49
43
17
T
45
41
18
F
44
43
19
S
47
49
20
S
54
21
M
59
64
22
T
71
75
23
W
82
85
24
T
93
92
25
F
99
96
26
S
102
95
27
S
99
90
28
M
91
81
29
T
80
69
30
W
68
58
31
T
56
49
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