Surf Forecasts:
Mundaka surf forecast from 17 Aug 2026:
- Best quality surf: Thursday 20 Aug, 11AM (local time) - 3.5ft (1.1m), 11s period, NW swell with glassy winds.
- Most powerful swell: Friday 21 Aug, 8AM (local time) - 5ft (1.6m), 11s period, NNW swell with 540 kJ wave energy.
- Next surfable swell (1★+): Thursday 20 Aug, 2AM (local time) - 2ft (0.6m), 13s period with NW swell.
Best Forecast Surf Conditions for Mundaka this week:
The surf forecast for Mundaka over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Thursday (Aug 20) at 2AM. The primary swell is predicted to be 0.6m and 13s period with a secondary swell of 0.4m and 7s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Mundaka in the next 16 days are 1.6m 11s 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+) | 2AM (Thu 20th Aug) | 2ft (0.6m) 13s |
| Best Surf | 11AM (Thu 20th Aug) | 3.5ft (1.1m) 11s |
| Most Powerful | 8AM (Fri 21st Aug) | 5ft (1.6m) 11s |
Table - best surf conditions forecast for Mundaka over the next 16 days.
The Lowdown
Alright, I’m Rusty, and I’ve been staring at the charts for this stretch. Let’s break it down.
Right now, the surf is flat and messy. We’ve got a long run of small, weak, and choppy conditions from Monday the 17th all the way through to Wednesday the 19th. Swell heights are barely pushing 2 ft and the period is short, like 6 seconds. The wind is mostly cross-onshore or onshore, so don’t even bother waxing up. The water’s sitting at 76°, which is much warmer than normal for this time of year, so that’s nice if you’re just floating around.
Thursday the 20th morning is the first glimmer of hope. The swell picks up to 4 ft from the NW, period jumps to 11 seconds, and the wind goes glassy. That’s clean. The wave energy is moderate (294). You’ll want to be at Mundaka (river mouth) for that one. The swell direction is NW, which is right in the sweet spot for this break. It’s a short window though—by afternoon it’s back to onshore and messy.
The rest of that week and into the next is pretty grim. Friday the 21st through Sunday the 23rd is all cross-onshore wind, lumpy, and small. The swell stays under 5 ft but the wind just ruins it. There’s a bit of a bump on Saturday the 22nd morning with a 3 ft NW swell, but it’s cross-shore wind and the energy is weak (157).
Then we hit a real gap. Monday the 24th through Thursday the 27th is a write-off. Swell drops to 1 ft to 4 ft, all short period, and the wind is never clean. You’re looking at 4 days of nothing.
But hold on—Friday the 28th gets interesting. The swell jumps to 6 ft from the NW in the morning, and the energy is strong (513). The wind is light cross-shore, so it’s not perfect, but it’s surfable. By Friday afternoon, the swell is 10 ft from the NW, period 9 seconds, and the energy is very strong (1351). That’s big, but it’s onshore wind, so expect some chop. This is expert-only territory.
Now, the standout. Saturday the 29th morning is the real deal. We’ve got a 15 ft NW swell with a 14-second period—that’s a long-period groundswell. The wind is glassy, WSW at 3 mph. The energy is through the roof (7198). This is exceptional surf, but only for experts. Mundaka is a river mouth, so that long-period swell will wrap in nicely, but it’s going to be big and powerful. If you’re not an expert, stay out of the water. The water temp is still warm, but we don’t have the anomaly for that date.
Sunday the 30th morning drops to 7 ft from the NW, period 10 seconds, with light cross-shore wind. The energy is still strong (1048), but it’s not as clean. Monday the 31st is a write-off with fresh cross-shore wind and rain.
So, the best bet is Saturday the 29th morning at Mundaka. It’s the only real standout. Get there early, and don’t forget your big-wave board.
Rusty
Short Range ForecastMostly dry. Warm (max 23°C on Mon afternoon, min 19°C on Tue night). Wind will be generally light. | Days 4-6 Weather SummaryModerate rain (total 14mm), heaviest on Fri morning. Warm (max 23°C on Thu afternoon, min 19°C on Thu morning). Wind will be generally light. | ||||||||||||||||||||
Monday 17 | Tuesday 18 | Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | |||||||||||||||
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) | NNW 6 | NW 7 | NNW 6 | NNW 8 | NNW 8 | NW 7 | NNW 6 | WNW 8 | NW 13 | NW 11 | NNW 11 | NNW 11 | NW 10 | NW 10 | NW 10 | NW 9 | NW 8 | NW 8 | NW 7 | NE 5 | NW 7 |
Wave Graph | |||||||||||||||||||||
26 | 54 | 26 | 45 | 42 | 8 | 6 | 6 | 104 | 278 | 396 | 533 | 377 | 392 | 296 | 155 | 100 | 78 | 65 | 63 | 51 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | on | cross | glassy | cross-on | glassy | glassy | on | glassy | glassy | on | cross-on | cross-on | cross-on | on | cross | cross-on | cross-on | cross | on | off |
High Tide | 8:16AM3.45m | 8:33PM3.49m | 8:53AM3.24m | 9:13PM3.17m | 9:33AM3.00m | 9:57PM2.85m | 10:21AM2.77m | 10:55PM2.59m | 11:31AM2.59m | 00:25AM2.45m | 1:08PM2.56m | 2:01AM2.50m | 2:30PM2.70m | 3:06AM2.67m | |||||||
Low Tide | 2:16PM0.37m | 2:40AM0.51m | 2:57PM0.64m | 3:20AM0.81m | 3:43PM0.93m | 4:07AM1.10m | 4:39PM1.19m | 5:07AM1.33m | 5:56PM1.36m | 6:31AM1.44m | 7:27PM1.36m | 7:56AM1.37m | 8:39PM1.20m | ||||||||
7:16 | — | — | 7:18 | — | — | 7:18 | — | — | 7:20 | — | — | 7:20 | — | — | 7:22 | — | — | 7:22 | — | — | |
— | — | 9:10 | — | — | 9:09 | — | — | 9:07 | — | — | 9:07 | — | — | 9:05 | — | — | 9:02 | — | — | 9:01 | |
mm | — | — | — | — | — | — | — | — | — | — | — | 4 | 7 | 2 | 1 | — | — | — | — | — | 3 |
Temp °C | 22 | 23 | 22 | 22 | 23 | 22 | 21 | 23 | 22 | 21 | 23 | 22 | 19 | 21 | 20 | 20 | 21 | 20 | 20 | 22 | 19 |
Feels °C | 23 | 24 | 23 | 25 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 18 | 20 | 19 | 19 | 19 | 18 | 19 | 22 | 20 |
Swell 1 Height (m) Direction Period (s) | NNW 6 | NW 7 | NNW 6 | NNW 8 | NNW 8 | NNW 5 | NNW 6 | NNW 5 | NW 13 | NW 11 | NNW 11 | NNW 11 | NW 10 | NW 10 | NW 10 | NW 9 | NW 8 | NW 8 | NW 7 | NW 7 | NW 7 |
26 | 54 | 26 | 45 | 42 | 8 | 6 | 6 | 104 | 278 | 396 | 533 | 377 | 392 | 296 | 155 | 100 | 78 | 65 | 41 | 51 | |
Swell 2 Height (m) Direction Period (s) | NW 8 | NW 8 | NW 8 | — | N 6 | NW 7 | WNW 8 | WNW 8 | NW 7 | WNW 9 | — | — | NE 4 | — | — | W 11 | W 10 | W 8 | — | W 8 | W 8 |
21 | 28 | 15 | — | 3 | 7 | 6 | 6 | 11 | 16 | — | — | 8 | — | — | 2 | 8 | 1 | — | 1 | 1 | |
Swell 3 Height (m) Direction Period (s) | — | — | NW 10 | — | — | WNW 8 | — | NW 11 | W 7 | — | — | — | — | — | — | — | — | — | — | — | — |
— | — | 4 | — | — | 6 | — | 5 | 1 | — | — | — | — | — | — | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | N 3 | — | — | NE 3 | — | — | — | — | — | NE 3 | NE 4 | ENE 4 | NE 5 | NE 4 |
— | — | — | — | — | — | — | 1 | — | — | 2 | — | — | — | — | — | 5 | 16 | 13 | 63 | 16 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 101 | 2 | 24 | 3 | 519 | 452 | 454 | 404 | 0 | 0 | 2 | 2 | 49 | 49 | 2 | 2 | 2 | 2 | 2 | 101 | 2 |
Best forecast wave conditions in Pais Vasco | |||||||||||||||||||||
Best forecast wave conditions in Spain (Europe) | |||||||||||||||||||||
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Information about the Mundaka Surf forecast
The above surf forecast table for Mundaka provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Mundaka can be found by selecting the local surf guide option on the grey menu. Our Mundaka 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 (Mundaka) 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 Mundaka 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.
Mundaka is 2 km (1 miles) from Bermeo. If you plan a holiday in Pais Vasco, look for hotels and other accommodation in Bermeo. Bermeo has rooms for a wide range of budgets as well as car hire and transport links.











