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Grande Trait surfForecast / Loire Atlantique / France
12 Day Weather and Surf, issued 7 am Tuesday 16 Sep 2025 CEST
Best Forecast Surf Conditions for Grande Trait this week:
The surf forecast for Grande Trait over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Thursday (Sep 18) at 2AM. The primary swell is predicted to be 1.0m and 12s period with a secondary swell of 0.4m and 12s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Grande Trait in the next 12 days are 1.6m 13s and forecast to arrive on Tuesday (Sep 16) at 2PM. 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 Tuesday (Sep 23) at 11AM.
| Wave Type | Time (CEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 2AM (Thu 18th Sep) | 3.5ft (1.0m) 12s |
| Best Surf | 2AM (Thu 18th Sep) | 3.5ft (1.0m) 12s |
| Most Powerful | 2PM (Tue 16th Sep) | 5ft (1.6m) 13s |
Table - best surf conditions forecast for Grande Trait over the next 12 days.
Short Range Forecast Mostly dry. Warm (max 25°C on Thu night, min 16°C on Tue morning). Wind will be generally light. | Days 3-6 Weather Summary Mostly dry. Warm (max 24°C on Fri afternoon, min 10°C on Sun night). Winds increasing (calm on Fri night, strong winds from the WSW by Sat night). | ||||||||||||||||||||
Tuesday 16 | Wednesday 17 | Thursday 18 | Friday 19 | Saturday 20 | Sunday 21 | Monday 22 | |||||||||||||||
| 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) (?) | 13 | 12 | 12 | 11 | 10 | 12 | 12 | 12 | 11 | 10 | 10 | 10 | 10 | 9 | 9 | 8 | 8 | 8 | 8 | 8 | 8 |
Wave (?)Graph  | |||||||||||||||||||||
| Energy (?) | 1087 | 1060 | 336 | 149 | 98 | 330 | 432 | 341 | 235 | 175 | 182 | 162 | 123 | 86 | 181 | 320 | 261 | 162 | 124 | 119 | 155 |
Wind (km/h) | |||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- on | cross- on | on | on | on | glass | cross- off | on | cross- off | cross- on | cross- on | cross- on | cross- on | on | cross- on | cross- on | cross- on | cross | cross- off | cross- off | cross |
High Tide / height (m) | 1:28PM 3.39 | 2:35AM 3.33 | 2:57PM 3.66 | 3:35AM 3.61 | 3:49PM 3.97 | 4:17AM 3.88 | 4:27PM 4.23 | 4:49AM 4.10 | 4:58PM 4.43 | 5:16AM 4.27 | 5:25PM 4.55 | 5:41AM 4.39 | 5:51PM 4.61 | ||||||||
Low Tide / height (m) | 7:32PM 1.23 | 8:04AM 1.31 | 8:48PM 1.01 | 9:11AM 1.02 | 9:46PM 0.70 | 10:03AM 0.70 | 10:32PM 0.42 | 10:46AM 0.42 | 11:11PM 0.20 | 11:24AM 0.22 | 11:46PM 0.08 | 11:59AM 0.12 | 12:20AM 0.06 | ||||||||
Tuesday 16 | Wednesday 17 | Thursday 18 | Friday 19 | Saturday 20 | Sunday 21 | Monday 22 | |||||||||||||||
| Sunrise | 7:47 | - | - | 7:48 | - | - | 7:48 | - | - | 7:50 | - | - | 7:52 | - | - | 7:52 | - | - | 7:54 | - | - |
| Sunset | - | 8:20 | - | - | 8:17 | - | - | 8:15 | - | - | 8:14 | - | - | 8:12 | - | - | 8:09 | - | - | 8:07 | - |
 | |  |  | |  | | | | | |  | | | |  | | |  | | | |
Rain (mm) | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 3 | - | - |
| Temp. °C | 16 | 17 | 16 | 16 | 17 | 17 | 16 | 23 | 25 | 21 | 24 | 22 | 20 | 20 | 18 | 15 | 16 | 14 | 11 | 14 | 13 |
| Feels °C (?) | 12 | 14 | 15 | 14 | 15 | 16 | 15 | 20 | 23 | 18 | 22 | 19 | 18 | 18 | 16 | 7 | 7 | 7 | 5 | 8 | 7 |
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Recent Eyeball Surf Reports for Loire Atlantique
The wind is still cross-on at Grande Trait (light winds from the W.(Wind varies from 230 to 300 degs) at Saint -Nazaire -Montoir 14 km from Grande Trait). 2.2m 13s groundswell from the W with a 0.9m 13s groundswell, also from the W. 2 swells combining so expect closeout sets.
1 h 15 min ago
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 Grande Trait 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.
Information about the Grande Trait Surf forecast
The above surf forecast table for Grande Trait provides essential information for determining whether the surfing conditions will be good over the next 12 days. A general guide to surfing at Grande Trait can be found by selecting the local surf guide option on the grey menu. Our Grande Trait 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 (Grande Trait) 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 Grande Trait 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.
Grande Trait is 7 km (4 miles) from the city of La Baule-Escoublac. If you plan a holiday in Loire Atlantique, look for hotels and other accommodation in La Baule-Escoublac. La Baule-Escoublac has rooms for a wide range of budgets as well as car hire and transport links.
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