Cabo de Sines surfForecast / Alentejo / Portugal

information circle16 Day Weather and Surf, issued 5 pm Saturday 21 Mar 2026 WET
Forecast update in hr  min  s Forecast update imminent
Cabo de Sines surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Cabo de Sines sea temperature is
14.7° C
(Which is 1.1°C colder than average for this time of year)

Best Forecast Surf Conditions for Cabo de Sines this week:

The surf forecast for Cabo de Sines over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Sunday (Mar 22) at 3AM. The primary swell is predicted to be 1.1m and 8s period with a secondary swell of 0.8m and 11s. The wind is predicted to be cross-offshore as the swell arrives.

The most powerful waves expected at Cabo de Sines in the next 16 days are 1.5m 13s and forecast to arrive on Thursday (Mar 26) at 12AM. Winds are predicted to be offshore 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 (Mar 24) at 6PM.

Wave TypeTime (WET) & Date Wave Height & Period
Next good surf (1 star+) 3AM (Sun 22nd Mar)3.5ft (1.1m) 8s
Best Surf 6PM (Sun 22nd Mar)3.5ft (1.1m) 14s
Most Powerful12AM (Thu 26th Mar)5ft (1.5m) 13s

Table - best surf conditions forecast for Cabo de Sines over the next 16 days.


Updates in  hr  min  s Forecast update imminent

Short Range Forecast Light rain (total 9mm), mostly falling on Sun afternoon. Very mild (max 17°C on Sat afternoon, min 12°C on Sat night). Wind will be generally light.

Days 3-6 Weather Summary Mostly dry. Warm (max 22°C on Thu afternoon, min 13°C on Thu night). Wind will be generally light.

Sat
21
Sunday
22
Monday
23
Tuesday
24
Wednesday
25
Thursday
26
Friday
27
PMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAM
Rating
(10 max)
2
2
2
2
2
2
2
2
1
1
2
2
3
3
3
3
0
2
2
2
2
Swell
Height Map
Wave Height (m) & direction (?)
0.8
NW
1.2
SW
1
SW
0.8
NW
0.8
NW
0.9
NW
0.9
NW
1
NW
1
NW
1
NW
0.6
NNW
0.6
NNW
1.1
NW
1.5
NW
1.4
NW
1.1
NW
1.1
NW
0.9
NNW
0.9
NNW
0.8
NNW
0.5
NW
Period(s) (?)1288151413131212111413141312131211111216
Wave
Graph
(?)Metric surfscale
Energy kJ (?)185201135258261249265287287250134111447734551431303207211171129
Wind
(km/h)
5
NNW
10
E
10
NE
5
NNW
5
SSE
5
ESE
15
NW
10
NE
10
SSE
20
NNW
15
NE
15
NE
15
NNE
15
NNE
20
NE
15
NE
20
SW
5
N
5
NW
5
WSW
5
E
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
glasscross-
off
offglasscrosscross-
off
crossoffcrosscross-
off
offoffoffoffoffoffonglassglassglassglass
High Tide
/ height (m)
4:02PM
3.44
4:22AM
3.44
4:42PM
3.34
5:05AM
3.24
5:26PM
3.18
5:55AM
2.98
6:19PM
2.99
6:58AM
2.72
7:30PM
2.80
8:27AM
2.53
9:04PM
2.72
10:11AM
2.54
10:38PM
2.82
11:31AM
2.70
Low Tide
/ height (m)
10:04PM
0.54
10:25AM
0.61
10:46PM
0.67
11:06AM
0.81
11:34PM
0.87
11:54AM
1.06
12:34AM
1.10
12:57PM
1.31
2:00AM
1.29
2:31PM
1.48
3:50AM
1.30
4:17PM
1.44
5:16AM
1.14
Sat
21
Sunday
22
Monday
23
Tuesday
24
Wednesday
25
Thursday
26
Friday
27
Sunrise--6:35--6:35--6:33--6:31--6:30--6:28--6:26
Sunset6:46--6:47--6:49--6:50--6:51--6:52--6:52--
thunderstorm
rain showers
clear
rain showers
clear
clear
part cloud
clear
clear
clear
clear
clear
part cloud
part cloud
clear
clear
part cloud
part cloud
cloud
clear
part cloud
Rain (mm)
31-5-----------------
Temp. °C171616171517171617181719211819221614161516
Feels °C (?)171515171517151516141516191615191314161415
  • Map Icons:
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  • 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 Cabo de Sines Surf forecast

The above surf forecast table for Cabo de Sines provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Cabo de Sines can be found by selecting the local surf guide option on the grey menu. Our Cabo de Sines 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 (Cabo de Sines) 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 Cabo de Sines 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.

Cabo de Sines is 2 km (1 miles) from Sines. If you plan a holiday in Portugal - Alentejo, look for hotels and other accommodation in Sines. Sines has rooms for a wide range of budgets as well as car hire and transport links.

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