Using Surf-Forecast’s Historical Surf Data To Find The Most Consistent Waves On Earth
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Surf Forecasts:
Lostmarc'h surfForecast / Brittany – Finistere / France
48hr Weather and Surf, issued 6 am Wednesday 31 Dec 2025 CETForecast update in hr min s Forecast update imminent
Lostmarc'h surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Lostmarc'h sea temperature is
10.5° C
(Which is 1.3°C colder than average for this time of year)How big are the waves at Lostmarc'h today?
The current surf forecast for Lostmarc'h at 10AM is: 0.9m 13s primary swell from a West direction (forecast issued at 06:00am December 31). An open ocean swell of 0.2m 6s is not directed at the surf break, a second open ocean swell of 0.7m 7s is not directed at the surf break. The wind direction is predicted to be offshore and the swell rating is 2.
| Time (CET) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (31 Dec) | 3ft (0.9m) | 13s |
| Afternoon (31 Dec) | 2.5ft (0.8m) | 13s |
| Evening (31 Dec) | 2.5ft (0.7m) | 12s |
Table - waves today at Lostmarc'h. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Wednesday 31 | Thursday 01 | Friday 02 | Sat 03 | |||||||||||||||||||||
| 4 AM | 7 AM | 10 AM | 1 PM | 4 PM | 7 PM | 10 PM | 1 AM | 4 AM | 7 AM | 10 AM | 1 PM | 4 PM | 7 PM | 10 PM | 1 AM | 4 AM | 7 AM | 10 AM | 1 PM | 4 PM | 7 PM | 10 PM | 1 AM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |    |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 14 | 14 | 13 | 13 | 13 | 13 | 12 | 12 | 12 | 12 | 12 | 11 | 15 | 14 | 14 | 13 | 13 | 13 | 12 | 12 | 12 | 10 | 6 | 7 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 257 | 289 | 277 | 219 | 212 | 157 | 145 | 106 | 104 | 103 | 70 | 60 | 67 | 66 | 58 | 56 | 85 | 83 | 74 | 73 | 46 | 61 | 170 | 176 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | off | off | off | cross- off | off | off | off | cross- off | cross- off | off | off | glass | cross- on | cross- off | cross- off | cross | cross- off | cross- off | cross- off | cross | cross | cross- off | cross- off | cross- off |
High Tide / height (m) | 1:24AM 4.57 | 1:57PM 4.69 | 2:29AM 4.87 | 2:59PM 4.96 | 3:26AM 5.20 | 3:55PM 5.21 | ||||||||||||||||||
Low Tide / height (m) | 7:40AM 1.09 | 8:12PM 0.94 | 8:46AM 0.77 | 9:13PM 0.69 | 9:44AM 0.44 | 10:08PM 0.45 | ||||||||||||||||||
Wednesday 31 | Thursday 01 | Friday 02 | Sat 03 | |||||||||||||||||||||
| Sunrise | - | - | 9:07 | - | - | - | - | - | - | - | 9:07 | - | - | - | - | - | - | - | 9:07 | - | - | - | - | - |
| Sunset | - | - | - | - | 5:32 | - | - | - | - | - | - | - | 5:34 | - | - | - | - | - | - | - | 5:35 | - | - | - |
 | |  | | | | | | | |  |  | |  |  | | | | | | | | | | |
Rain (mm) | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Temp. °C | 3 | 3 | 3 | 4 | 5 | 5 | 4 | 3 | 3 | 3 | 4 | 6 | 7 | 8 | 8 | 9 | 8 | 8 | 8 | 9 | 9 | 8 | 6 | 6 |
| Feels °C (?) | -4 | -4 | -4 | -2 | -1 | -1 | -1 | -2 | -1 | -1 | 1 | 4 | 4 | 3 | 3 | 5 | 3 | 3 | 3 | 3 | 2 | -1 | -2 | -1 |
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
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