Surf Forecasts:
Islares surf forecast from 5 Aug 2026:
- Most powerful swell: Thursday 6 Aug, 2PM (local time) - 2ft (0.6m), 8s period, NW swell with 57 kJ wave energy.
Best Forecast Surf Conditions for Islares this week:
The most powerful waves expected at Islares in the next 16 days are 0.6m 8s and forecast to arrive on Thursday (Aug 06) 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 0.3m 6s period and expected on Tuesday (Aug 11) at 8PM.
| Wave Type | Time (CEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 2PM (Thu 6th Aug) | 2ft (0.6m) 8s |
Table - best surf conditions forecast for Islares over the next 16 days.
The Lowdown
Alright, Rusty here. Let’s break down what’s coming up at Islares over the next couple of weeks, and I’ll be honest – there’s not a whole lot to get excited about.
For the first twelve days, from Thursday the 6th of August all the way through Monday the 17th, the surf is basically a no-show. Swell heights are tiny, mostly under 2 feet, and the energy readings are weak, barely hitting 50 early on. We get some glassy mornings on Saturday the 8th and Tuesday the 11th, but with no swell to work with, it’s just a flat, pretty ocean. A real bummer.
The only real pulse we see arrives on Tuesday the 18th of August. Swell builds to about 5 feet from the NW, with a period of 9 seconds, and the combined swell energy jumps to 437 – that’s a moderate, rideable amount of juice. But the wind is cross-shore in the morning and turns cross-onshore later, so it’s not going to be clean. The forecast calls it marginal, so it’s more about getting wet than scoring perfect waves. Still, it’s the best thing on offer.
Islares is usually a fairly consistent spot, so this long flat spell is unusual. Forecasts can change, so keep an eye out, but for now, the next week and a half is a tough one. Hang in there.
Short Range ForecastMostly dry. Warm (max 25°C on Sat afternoon, min 17°C on Thu night). Wind will be generally light. | Days 5-7 Weather SummaryLight rain (total 4mm), mostly falling on Sun night. Warm (max 24°C on Sun afternoon, min 18°C on Mon night). Wind will be generally light. | ||||||||||||||||||
Thursday 6 | Friday 7 | Saturday 8 | Sunday 9 | Monday 10 | Tuesday 11 | ||||||||||||||
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 9 | NNW 8 | NNW 8 | NNW 7 | NNW 7 | NW 7 | NNW 6 | NNW 6 | N 12 | NNW 11 | NNW 10 | NNW 10 | NW 9 | NW 10 | NW 9 | NW 9 | NW 9 | NW 10 | NW 9 |
Wave Graph  | |||||||||||||||||||
 kJ | 46 | 47 | 44 | 31 | 19 | 11 | 11 | 3 | 3 | 12 | 40 | 38 | 41 | 45 | 43 | 39 | 36 | 46 | 27 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | cross | cross-on | glassy | cross | cross-on | cross-off | glassy | cross-on | off | cross-on | cross-on | cross-off | cross | on | cross-off | glassy | cross-on | glassy |
High Tide | 9:54PM3.17m | 10:26AM3.01m | 10:57PM2.99m | 11:37AM2.91m | 00:21AM2.88m | 1:04PM2.94m | 1:51AM2.94m | 2:25PM3.13m | 3:07AM3.14m | 3:31PM3.43m | 4:06AM3.38m | 4:26PM3.73m | 4:57AM3.59m | ||||||
Low Tide | 4:10AM0.78m | 4:38PM0.90m | 5:16AM0.95m | 5:55PM0.99m | 6:36AM1.02m | 7:22PM0.93m | 7:57AM0.93m | 8:40PM0.71m | 9:06AM0.71m | 9:43PM0.42m | 10:02AM0.46m | 10:36PM0.15m | |||||||
 |  | |  |  | | | | |  | | |  | | | | | | | |
 | — | 7:07 | — | — | 7:07 | — | — | 7:09 | — | — | 7:09 | — | — | 7:11 | — | — | 7:13 | — | — |
 | 9:30 | — | — | 9:30 | — | — | 9:28 | — | — | 9:27 | — | — | 9:24 | — | — | 9:23 | — | — | 9:22 |
mm | — | — | — | — | — | — | — | — | — | 1 | — | — | 3 | — | — | — | — | — | — |
Temp °C | 21 | 20 | 21 | 20 | 20 | 23 | 22 | 22 | 25 | 23 | 22 | 24 | 21 | 20 | 23 | 22 | 22 | 24 | 23 |
Feels °C | 22 | 21 | 21 | 20 | 21 | 23 | 22 | 23 | 25 | 23 | 23 | 24 | 22 | 21 | 24 | 23 | 23 | 24 | 24 |
Swell 1 Height (m) Direction Period (s) | NW 9 | NNW 8 | NNW 8 | NNW 7 | NNW 7 | NW 7 | NNW 6 | NNW 6 | NNW 5 | N 5 | NNW 10 | NNW 10 | NW 9 | NW 10 | NW 9 | NW 9 | NW 9 | NW 10 | NW 9 |
| kJ | 46 | 47 | 44 | 31 | 19 | 11 | 11 | 3 | 3 | 4 | 40 | 38 | 41 | 45 | 43 | 39 | 36 | 46 | 27 |
Swell 2 Height (m) Direction Period (s) | — | — | NW 10 | W 10 | NNE 4 | W 9 | W 9 | NNE 5 | N 12 | NNW 11 | N 4 | NW 6 | W 8 | NNW 3 | — | NNW 11 | — | N 6 | N 5 |
| kJ | — | — | 4 | 2 | 2 | 2 | 2 | 2 | 3 | 12 | 1 | 1 | 1 | 1 | — | 12 | — | 3 | 5 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | NW 10 | — | — | NW 7 | W 9 | NW 6 | NW 6 | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | 4 | — | — | 2 | 2 | 1 | 1 | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | — | NE 4 | — | — | NNE 5 | — | — | NNE 4 | — | NNW 5 | NW 3 | NW 3 | NW 3 | NNW 4 | — | — | ENE 2 | — |
| kJ | — | — | 2 | — | — | 2 | — | — | 2 | — | 2 | 3 | 2 | 2 | 1 | — | — | 1 | — |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 1 | 19 | 27 | 17 | 26 | 405 | 109 | 586 | 484 | 27 | 53 | 51 | 1 | 1 | 51 | 1 | 1 | 51 | 1 |
Best forecast wave conditions in Spain - Cantabria | |||||||||||||||||||
Best forecast wave conditions in Spain (Europe) | |||||||||||||||||||
Header Global | |||||||||||||||||||
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The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Islares 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 Islares Surf forecast
The above surf forecast table for Islares provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Islares can be found by selecting the local surf guide option on the grey menu. Our Islares 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 (Islares) 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 Islares 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.
Islares is 8 km (5 miles) from Castro-Urdiales. If you plan a holiday in Spain - Cantabria, look for hotels and other accommodation in Castro-Urdiales. Castro-Urdiales has rooms for a wide range of budgets as well as car hire and transport links.
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