Using Surf-Forecast’s Historical Surf Data To Find The Most Consistent Waves On Earth
Using our statistical data for 7000 spots dating back to 2006, we can find those waves that break the most, with the best winds.
- Forecast
- Maps
- Live
- Weather State
- Spot Information
Surf Forecasts:
Prefailles surfForecast / Loire Atlantique / France
12 Day Weather and Surf, issued 6 am Friday 19 Dec 2025 CETForecast update in hr min s Forecast update imminent
Prefailles surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Prefailles sea temperature is
11.4° C
(Which is 1.2°C colder than average for this time of year)Best Forecast Surf Conditions for Prefailles this week:
The surf forecast for Prefailles over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Friday (Dec 19) at 4PM. The primary swell is predicted to be 1.7m and 16s period. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Prefailles in the next 12 days are 2.2m 13s and forecast to arrive on Sunday (Dec 21) at 4AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.5m 3s period and expected on Friday (Dec 26) at 1PM.
| Wave Type | Time (CET) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 4PM (Fri 19th Dec) | 5.5ft (1.7m) 16s |
| Best Surf | 4PM (Fri 19th Dec) | 5.5ft (1.7m) 16s |
| Most Powerful | 4AM (Sun 21st Dec) | 7ft (2.2m) 13s |
Table - best surf conditions forecast for Prefailles over the next 12 days.
Updates in hr min s Forecast update imminent
Short Range Forecast Moderate rain (total 14mm), heaviest on Sat night. Very mild (max 12°C on Sat afternoon, min 9°C on Fri night). Winds increasing (calm on Fri afternoon, fresh winds from the SW by Sat afternoon). | Days 3-6 Weather Summary Some drizzle, heaviest during Tue night. Icy conditions (max 10°C on Mon afternoon, min 0°C on Wed night). Winds increasing (calm on Mon morning, strong winds from the NE by Wed night). | ||||||||||||||||||||
Friday 19 | Saturday 20 | Sunday 21 | Monday 22 | Tuesday 23 | Wednesday 24 | Thursday 25 | |||||||||||||||
| AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Rating (10 max) | |||||||||||||||||||||
Swell Height Map |  |  |  |  |  |  |  | ||||||||||||||
| Wave Height (m) & direction (?) | |||||||||||||||||||||
| Period(s) (?) | 17 | 16 | 16 | 15 | 14 | 13 | 16 | 16 | 16 | 16 | 14 | 14 | 12 | 10 | 14 | 14 | 13 | 12 | 13 | 13 | 12 |
Wave (?)Graph  | |||||||||||||||||||||
 kJ (?) | 1417 | 1446 | 1331 | 949 | 862 | 757 | 1376 | 1324 | 1358 | 999 | 763 | 243 | 811 | 392 | 1032 | 947 | 690 | 258 | 178 | 117 | 73 |
Wind (km/h) | |||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- off | glass | cross | cross- on | cross- on | on | on | on | glass | off | glass | cross- on | cross- on | cross- on | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off |
High Tide / height (m) | 4:09PM 3.89 | 4:23AM 4.10 | 4:41PM 3.95 | 4:56AM 4.17 | 5:14PM 3.97 | 5:29AM 4.20 | 5:47PM 3.95 | 6:03AM 4.20 | 6:21PM 3.90 | 6:39AM 4.15 | 6:59PM 3.83 | 7:18AM 4.08 | 7:40PM 3.73 | ||||||||
Low Tide / height (m) | 10:21AM 0.62 | 10:36PM 0.65 | 11:01AM 0.54 | 11:15PM 0.58 | 11:39AM 0.50 | 11:52PM 0.56 | 12:18PM 0.50 | 12:30AM 0.58 | 12:57PM 0.54 | 1:09AM 0.63 | 1:37PM 0.60 | 1:49AM 0.72 | 2:20PM 0.68 | 2:34AM 0.83 | |||||||
Friday 19 | Saturday 20 | Sunday 21 | Monday 22 | Tuesday 23 | Wednesday 24 | Thursday 25 | |||||||||||||||
| Sunrise | 8:49 | - | - | 8:51 | - | - | 8:51 | - | - | 8:52 | - | - | 8:52 | - | - | 8:52 | - | - | 8:52 | - | - |
| Sunset | - | 5:20 | - | - | 5:20 | - | - | 5:21 | - | - | 5:21 | - | - | 5:22 | - | - | 5:22 | - | - | 5:22 | - |
 | |  |  |  |  | | |  | |  | | | |  | | | | | |  | |
Rain (mm) | - | - | - | - | 3 | 9 | 2 | - | - | - | - | - | - | - | 1 | - | - | - | - | - | - |
| Temp. °C | 11 | 11 | 11 | 10 | 12 | 11 | 10 | 10 | 9 | 9 | 10 | 8 | 8 | 9 | 8 | 6 | 7 | 5 | 1 | 2 | 1 |
| Feels °C (?) | 8 | 10 | 9 | 5 | 4 | 7 | 7 | 6 | 5 | 7 | 8 | 3 | 1 | 3 | 3 | -2 | -1 | -4 | -9 | -8 | -8 |
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
Latest Updates
Nazare Big Wave Challenge Gets Yellow Alert, Could Run Saturday in Giant Waves
70-foot plus waves predicted for Portuguese big wave tow surfing competition.
Buy Less, Surf More This Black Friday
Surf-forecast is providing a free, all-access pass to our premium features and 12-day forecasts all weekend.
Quiksilver Teams Up With PrimaLoft® For World’s First Thermal Layering System for a Wetsuit.
Previously used in our snow jackets for mountain conditions, PrimaLoft® technology is making its debut in the surf industry. The aim is to bring mountain-grade warmth to the waves.
Read more
Discover more articles and updates in the Greenroom.
FREE! Surf-Forecast.com widget for your website
The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Prefailles surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.
false
Information about the Prefailles Surf forecast
The above surf forecast table for Prefailles provides essential information for determining whether the surfing conditions will be good over the next 12 days. A general guide to surfing at Prefailles can be found by selecting the local surf guide option on the grey menu. Our Prefailles surf forecast is unique since it includes wave energy (power) that defines the real feel of the surf rather than just the height or the period. If you surf the same spot (Prefailles) regularly then make a mental note of the wave energy from the surf forecast table each time you go. Very soon you may start to choose your surf days based on the wave energy alone combined with our forecast of favourable offshore wind conditions. Our star ratings will help here and of course you will also find the usual wave height and period predictions on our surf forecasts as well as a full break down of the swell components under our advanced users option (to reveal that, click the little Einstein character under the tide times).
Further information to help with frequently asked questions about our surf forecast for Prefailles may be found under the help tab on the top menu and also by moving your mouse over the question marks on the surf forecast table itself. Please always bear in mind that the forecast is for near-shore open water and local factors at each surf break influence the actual breaking wave height, such as the beach / reef profile, water depths offshore and shelter.
Prefailles is 17 km (11 miles) from Saint-Nazaire. If you plan a holiday in Loire Atlantique, look for hotels and other accommodation in Saint-Nazaire. Saint-Nazaire has rooms for a wide range of budgets as well as car hire and transport links.
Nearest