Month summary
In December 2026 the highest coefficient is 100, on December 25, and the lowest 45, on December 18. There are 6 days of spring tides (coefficient 80 or more).
October 2026November 2026December 2026January 2027February 2027March 2027April 2027May 2027June 2027July 2027August 2027September 2027October 2027
Which days in December have spring tides?
neap tides: coefficient < 40mid-range tides: 40–79spring tides: 80+
Tide coefficient day by day, December 2026
| Day | Coefficient | By Brest high water (Paris time) | Moon |
|---|---|---|---|
| Tue 1 | 58 | 10:18: 58 · 22:52: 56 | Last quarter |
| Wed 2 | 54 | 11:28: 54 | Last quarter |
| Thu 3 | 54 | 00:02: 53 · 12:36: 54 | Waning crescent |
| Fri 4 | 58 | 01:08: 56 · 13:38: 58 | Waning crescent |
| Sat 5 | 63 | 02:05: 60 · 14:31: 63 | Waning crescent |
| Sun 6 | 68 | 02:55: 65 · 15:17: 68 | Waning crescent |
| Mon 7 | 72 | 03:38: 70 · 15:59: 72 | New moon |
| Tue 8 | 74 | 04:18: 73 · 16:37: 74 | New moon |
| Wed 9 | 75 | 04:55: 75 · 17:13: 75 | New moon |
| Thu 10 | 74 | 05:31: 74 · 17:48: 74 | New moon |
| Fri 11 | 73 | 06:05: 73 · 18:22: 71 | Waxing crescent |
| Sat 12 | 69 | 06:39: 69 · 18:56: 67 | Waxing crescent |
| Sun 13 | 65 | 07:14: 65 · 19:32: 63 | Waxing crescent |
| Mon 14 | 60 | 07:50: 60 · 20:10: 57 | Waxing crescent |
| Tue 15 | 55 | 08:30: 55 · 20:52: 52 | First quarter |
| Wed 16 | 50 | 09:15: 50 · 21:40: 47 | First quarter |
| Thu 17 | 46 | 10:08: 46 · 22:39: 45 | First quarter |
| Fri 18 | 45 | 11:12: 44 · 23:46: 45 | First quarter |
| Sat 19 | 47 | 12:21: 47 | Waxing gibbous |
| Sun 20 | 55 | 00:56: 51 · 13:29: 55 | Waxing gibbous |
| Mon 21 | 66 | 02:01: 60 · 14:32: 66 | Waxing gibbous |
| Tue 22 | 78 | 03:01: 72 · 15:29: 78 | Full moon |
| Wed 23 | 89 | 03:56: 84 · 16:22: 89 | Full moon |
| Thu 24 | 97 | 04:48: 93 · 17:13: 97 | Full moon |
| Fri 25 | 100 | 05:38: 99 · 18:02: 100 | Full moon |
| Sat 26 | 100 | 06:26: 100 · 18:51: 99 | Waning gibbous |
| Sun 27 | 97 | 07:15: 97 · 19:38: 93 | Waning gibbous |
| Mon 28 | 89 | 08:02: 89 · 20:27: 84 | Waning gibbous |
| Tue 29 | 79 | 08:51: 79 · 21:17: 73 | Last quarter |
| Wed 30 | 67 | 09:43: 67 · 22:10: 62 | Last quarter |
| Thu 31 | 57 | 10:39: 57 · 23:09: 52 | Last quarter |
What does the coefficient mean?
A low coefficient (neap tides) means little difference between high and low water; a high one (spring tides), a lot. It runs from 20 to 120 and is the same number all along the Atlantic coast of Europe; the metres change from port to port.
Where does the coefficient come from?
The coefficient uses the Brest reference and the 20–120 scale of the SHOM, the French hydrographic service, computed by the Tides Pro engine.
Frequently asked questions
What is the highest tide coefficient in December 2026?
100, on December 25.
How many spring tide days are there in December 2026?
6 days with a coefficient of 80 or more.