Islares surf break

Islares surfForecast / Cantabria / Spain

information circle12 Day Weather and Surf, issued 12 pm Saturday 20 Dec 2025 CET
Forecast update in hr  min  s Forecast update imminent
Today's Islares sea temperature is
14.9° C
(Which is 1.3°C warmer than normal for this time of year)


Best Forecast Surf Conditions for Islares this week:

The surf forecast for Islares over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Saturday (Dec 20) at 7PM. The primary swell is predicted to be 1.6m and 14s period. The wind is predicted to be glassy as the swell arrives.

The most powerful waves expected at Islares in the next 12 days are 2.3m 16s and forecast to arrive on Monday (Dec 22) at 7AM. Winds are predicted to be offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.2m 7s period and expected on Thursday (Dec 25) at 1PM.

Wave TypeTime (CET) & Date Wave Height & Period
Next good surf (1 star+) 7PM (Sat 20th Dec)5ft (1.6m) 14s
Best Surf 4PM (Sun 21st Dec)7ft (2.2m) 15s
Most Powerful 7AM (Mon 22nd Dec)7.5ft (2.3m) 16s

Table - best surf conditions forecast for Islares over the next 12 days.

Updates in  hr  min  s Forecast update imminent

Short Range Forecast Moderate rain (total 16mm), heaviest on Sun morning. Very mild (max 14°C on Sat morning, min 6°C on Sun night). Wind will be generally light.

Days 3-6 Weather Summary Light rain (total 7mm), mostly falling on Tue night. Very mild (max 12°C on Tue afternoon, min 4°C on Thu night). Wind will be generally light.

Saturday
20
Sunday
21
Monday
22
Tuesday
23
Wednesday
24
Thursday
25
Friday
26
AMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNight
Rating
(10 max)
4
3
3
3
4
4
4
4
2
3
0
1
0
1
1
0
0
1
1
0
0
Swell
Height Map
Wave Height (m) & direction (?)
2.1
NW
1.7
NW
1.6
NW
2
NW
2.2
NW
2.2
NW
2.2
NW
1.9
NW
1.8
NW
1.6
NW
1.3
NW
1.1
NW
0.9
NNW
1.3
NNW
1.2
NNW
0.9
NNW
0.8
NNW
0.6
NNW
0.5
NW
0.4
NW
0.3
NW
Period(s) (?)161413131516161514131211111312141312121111
Wave
Graph
(?)Metric surfscale
Energy kJ (?)2185120383413462122238423141542115078445528820852040533721999693219
Wind
(km/h)
10
S
10
SW
25
S
20
W
10
SW
10
S
10
S
10
SSW
15
SW
10
SSW
15
WNW
5
W
15
NNW
15
N
10
NE
15
NNE
10
N
5
WSW
5
S
10
E
15
SE
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
offcross-
off
offcross-
off
cross-
off
offoffcross-
off
cross-
off
cross-
off
cross-
on
crossononcross-
on
cross-
on
onglassoffcrosscross-
off
High Tide
/ height (m)
4:48PM
3.26
5:03AM
3.47
5:23PM
3.26
5:38AM
3.49
5:58PM
3.23
6:14AM
3.47
6:35PM
3.18
6:51AM
3.43
7:13PM
3.11
7:30AM
3.36
7:56PM
3.03
8:13AM
3.27
8:45PM
2.96
Low Tide
/ height (m)
10:36AM
0.52
10:47PM
0.57
11:13AM
0.49
11:23PM
0.56
11:50AM
0.49
11:58PM
0.57
12:27PM
0.53
12:34AM
0.61
1:05PM
0.57
1:13AM
0.68
1:47PM
0.63
1:56AM
0.77
2:33PM
0.69
2:46AM
0.86
Saturday
20
Sunday
21
Monday
22
Tuesday
23
Wednesday
24
Thursday
25
Friday
26
Sunrise8:41--8:41--8:41--8:42--8:42--8:44--8:44--
Sunset-5:38--5:38--5:39--5:39--5:40--5:42--5:42-
part cloud
part cloud
cloud
heavy rain
light rain
light rain
part cloud
light rain
rain showers
part cloud
light rain
light rain
light rain
light rain
rain showers
part cloud
cloud
part cloud
clear
clear
rain showers
Rain (mm)
---1111-12-13111-----1
Temp. °C1414127871011911121110109866676
Feels °C (?)11126244685889776323332
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
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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 12 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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