Surf Forecasts:
Bidart surf forecast from 18 Aug 2026:
- Best quality surf: Thursday 20 Aug, 8AM (local time) - 3.5ft (1.0m), 12s period, NW swell with cross-offshore winds.
- Most powerful swell: Friday 21 Aug, 8AM (local time) - 5ft (1.6m), 10s period, NW swell with 503 kJ wave energy.
- Next surfable swell (1★+): Thursday 20 Aug, 8AM (local time) - 3.5ft (1.0m), 12s period with NW swell.
Best Forecast Surf Conditions for Bidart this week:
The surf forecast for Bidart over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Thursday (Aug 20) at 8AM. The primary swell is predicted to be 1.0m and 12s period. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Bidart in the next 16 days are 1.6m 10s and forecast to arrive on Friday (Aug 21) at 8AM. Winds are predicted to be cross-onshore at the time the swell arrives.
| Wave Type | Time (CEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 8AM (Thu 20th Aug) | 3.5ft (1.0m) 12s |
| Best Surf | 8AM (Thu 20th Aug) | 3.5ft (1.0m) 12s |
| Most Powerful | 8AM (Fri 21st Aug) | 5ft (1.6m) 10s |
Table - best surf conditions forecast for Bidart over the next 16 days.
The Lowdown
Right, folks, let’s see what’s on the cards for the next couple of weeks. I’m looking at the Bidart stretch, and I gotta be straight with you: the opening days are a total write-off. We’ve got some tiny, weak dribble from the NW, but with onshore winds and poor conditions, it’s not worth even paddling out for. The first week is a bit of a slow burn, with a few windows of opportunity, but the real standout is a bit of a wildcard later on.
The first real glimmer of hope comes on Thursday, the 20th of August. The morning is looking choice. The wind is going to be glassy, and we’ll see a fresh NW groundswell come through at 4 ft. The swell period is a juicy 11 seconds, which means proper energy. The combined energy of all swells is moderate at 304. The water temp is a balmy 77°, which is a massive 6° warmer than usual for this time of year – that’s seriously unusual, so you might not even need a spring suit for a dawn session. This is the best on offer in the first week, no doubt.
Then things get a bit messy again. Friday the 21st has a bit more size, with 5 ft NW swell, but the wind is onshore and the conditions are marginal. Saturday the 22nd of August morning is your next good call. The wind is clean, switching cross-offshore from the ESE, and we’ve got a solid 4 ft NW swell. The energy is moderate at 235, and it’ll be a fun, clean wave. Sunday the 23rd and Monday the 24th are surfable, but only just – small, glassy conditions with a 3 ft to 3 ft NW swell, but the period is short, so it’ll be a bit weak.
Now, for the proper big boy session, you’ll want to look at Thursday the 27th of August. This is the standout swell of the entire forecast. We’re looking at a thumping 8 ft WNW swell with a 9-second period. The combined energy is a massive 1184 – that’s serious power. But here’s the catch: the wind is a strong cross-shore from the SW at 19 mph, making it lumpy and messy. For Bidart, this is an expert-only zone. With that much power and size, it’s going to be a heavy, challenging wave. The conditions are marginal, but if you’ve got the skills, you could score some absolute bombs. This is for the elite crew only.
Friday the 28th of August stays big, with 5 ft to 6 ft NW swell, but the onshore wind keeps it from being clean. The best morning session of the second week is actually Saturday the 29th of August. The wind is light and cross-offshore from the ESE, and we’ve got a clean 4 ft WNW swell. The energy is a solid 232. It’s a much more manageable size than the big Thursday, and the conditions will be much better for a long session.
The final few days of August and into September are flat and small – nothing to get excited about. The setup is looking more interesting for kite surfing than paddle surfing for the most part.
Stay sharp and don’t sleep on that Thursday session if you’re a charger.
Rusty.
Short Range ForecastLight rain (total 4mm), mostly falling on Thu night. Warm (max 23°C on Tue afternoon, min 18°C on Wed morning). Wind will be generally light. | Days 4-6 Weather SummaryModerate rain (total 19mm), heaviest on Sat morning. Warm (max 21°C on Fri night, min 16°C on Fri night). Wind will be generally light. | ||||||||||||||||||||
Tuesday 18 | Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | |||||||||||||||
AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Swell Height Map | |||||||||||||||||||||
Wave Height (m) Direction Period (s) | NW 7 | NW 8 | NW 7 | NW 6 | WNW 8 | NW 13 | NW 11 | NW 11 | NW 10 | NW 10 | NW 10 | NW 10 | NW 9 | NW 9 | NW 8 | NW 8 | NW 7 | NW 7 | NW 7 | NW 7 | NNW 6 |
Wave Graph | |||||||||||||||||||||
17 | 33 | 13 | 9 | 6 | 83 | 304 | 319 | 400 | 475 | 465 | 384 | 235 | 172 | 153 | 101 | 65 | 77 | 89 | 100 | 32 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | cross-on | glassy | cross-on | on | cross-on | glassy | cross-on | on | cross-on | on | glassy | cross-off | cross | cross-off | glassy | glassy | glassy | glassy | on | cross-on |
High Tide | 8:54AM3.28m | 9:13PM3.21m | 9:33AM3.04m | 9:57PM2.89m | 10:21AM2.81m | 10:56PM2.63m | 11:31AM2.63m | 00:26AM2.48m | 1:09PM2.59m | 2:03AM2.54m | 2:31PM2.73m | 3:07AM2.71m | 3:24PM2.96m | 3:51AM2.93m | |||||||
Low Tide | 2:57PM0.65m | 3:21AM0.82m | 3:43PM0.94m | 4:07AM1.12m | 4:39PM1.21m | 5:08AM1.36m | 5:56PM1.38m | 6:31AM1.47m | 7:27PM1.38m | 7:56AM1.39m | 8:39PM1.22m | 8:57AM1.19m | 9:30PM0.99m | ||||||||
7:13 | — | — | 7:15 | — | — | 7:16 | — | — | 7:16 | — | — | 7:18 | — | — | 7:18 | — | — | 7:20 | — | — | |
— | — | 9:05 | — | — | 9:04 | — | — | 9:01 | — | — | 9:00 | — | 8:59 | — | — | 8:57 | — | — | 8:55 | — | |
mm | — | — | — | — | — | — | — | — | 4 | — | 2 | 2 | 9 | 1 | — | — | — | 5 | 2 | 1 | 2 |
Temp °C | 22 | 23 | 22 | 21 | 23 | 22 | 22 | 23 | 20 | 20 | 20 | 21 | 16 | 17 | 17 | 16 | 17 | 18 | 17 | 19 | 20 |
Feels °C | 24 | 23 | 23 | 23 | 23 | 24 | 24 | 23 | 20 | 20 | 20 | 20 | 16 | 17 | 17 | 17 | 18 | 19 | 18 | 20 | 19 |
Swell 1 Height (m) Direction Period (s) | NNW 6 | NW 8 | NW 7 | NW 6 | NNW 6 | NW 13 | NW 11 | NW 11 | NW 10 | NW 10 | NW 10 | NW 10 | NW 9 | NW 9 | NW 8 | NW 8 | NW 7 | NW 7 | NW 7 | NW 7 | NNW 6 |
12 | 33 | 13 | 9 | 3 | 83 | 304 | 319 | 400 | 475 | 465 | 384 | 235 | 172 | 153 | 101 | 65 | 77 | 89 | 100 | 32 | |
Swell 2 Height (m) Direction Period (s) | NW 7 | — | NNW 5 | WNW 8 | WNW 8 | NW 7 | — | — | — | — | — | — | — | — | — | — | — | — | — | NW 10 | W 9 |
17 | — | 5 | 6 | 6 | 12 | — | — | — | — | — | — | — | — | — | — | — | — | — | 4 | 2 | |
Swell 3 Height (m) Direction Period (s) | — | — | WNW 8 | — | NW 11 | WNW 7 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | NW 9 |
— | — | 7 | — | 5 | 5 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 3 | |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 34 | 608 | 525 | 492 | 494 | 42 | 0 | 198 | 138 | 14 | 138 | 0 | 0 | 3 | 0 | 0 | 0 | 0 | 0 | 385 | 552 |
Best forecast wave conditions in La Cote Basque | |||||||||||||||||||||
Best forecast wave conditions in France | |||||||||||||||||||||
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Information about the Bidart Surf forecast
The above surf forecast table for Bidart provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Bidart can be found by selecting the local surf guide option on the grey menu. Our Bidart 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 (Bidart) 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 Bidart 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.
Bidart is 7 km (4 miles) from Biarritz. If you plan a holiday in La Cote Basque, look for hotels and other accommodation in Biarritz. Biarritz has rooms for a wide range of budgets as well as car hire and transport links.











