La Posta Surf Break

Lat Long: 34.92° S 54.85° W

La Posta 48 hour detailed Surf Forecast

Issued: 8 pm 20 Aug 2026 (local time)

Forecast update in  hr  min

Today's La Posta sea temperature is
10.7° C
0.4° 

La Posta surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.


How big are the waves at La Posta today (21 Aug):

  • Morning surf: Morning surf (21 Aug, local time) - 7ft (2.1m), 8s period with S swell.
  • Afternoon surf: Afternoon surf (21 Aug, local time) - 6.5ft (2.0m), 8s period with S swell.
  • Evening surf: Evening surf (21 Aug, local time) - 6.5ft (2.0m), 9s period with S swell.

The current surf forecast for La Posta at 5AM is: 2.1m 7s primary swell from a South direction and 0.1m 12s secondary swell from a East direction (forecast issued at 08:00pm August 20). An open ocean swell of 0.2m 8s is not directed at the surf break. The wind direction is predicted to be onshore.

Time (-03) & DateWave HeightWave Period
Morning (21 Aug)7ft (2.1m)8s
Afternoon (21 Aug)6.5ft (2.0m)8s
Evening (21 Aug)6.5ft (2.0m)9s

Table - waves today at La Posta. (Swell directed towards the surf break)


Short Range Forecast

Mostly dry. Very mild (max 11°C on Thu night, min 8°C on Thu night). Winds decreasing (strong winds from the SSW on Thu night, moderate winds from the SSW by Sun afternoon).

Thu
20
Friday
21
Saturday
22
6 PM
9 PM
12 AM
3 AM
6 AM
9 AM
12 PM
3 PM
6 PM
9 PM
12 AM
3 AM
6 AM
9 AM
12 PM
3 PM
6 PM
9 PM
Rating
(10 max)
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.4
SSW
6
0.8
SSW
4
1.7
S
6
2
S
7
2.2
S
8
2.1
S
8
2.1
S
8
2
S
8
2
S
9
2
S
9
1.9
S
10
1.9
S
10
2
SSW
10
1.7
S
10
2
SSW
10
1.7
S
12
1.7
S
12
1.6
S
12
Wave Graph
Metric surfscale
Energy kJ
14
16
183
377
551
510
545
520
607
642
641
697
727
555
870
763
805
675
Wind (km/h)
25
SW
35
SW
45
SSW
40
SSW
40
SSW
35
SSW
35
SSW
30
SSW
30
SW
30
SSW
25
SW
30
WSW
30
WSW
30
WSW
35
WSW
40
WSW
30
WSW
25
W
Wind State
cross-on
cross-on
on
on
on
on
on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross
cross
cross
cross-on
cross
High Tide
4:53AM0.18m
3:07PM0.26m
5:30AM0.18m
4:10PM0.26m
Low Tide
10:21PM0.07m
7:46AM0.17m
11:10PM0.08m
8:32AM0.17m
light rain
cloud
part cloud
clear
clear
cloud
cloud
part cloud
part cloud
cloud
clear
clear
clear
part cloud
clear
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
7:13
7:11
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:10
6:12
6:13
 mm
2
Temp °C
11
11
8
8
8
8
8
9
9
9
9
9
8
8
8
8
10
10
Feels °C
7
4
-1
-1
-1
-1
-1
1
1
2
2
2
1
0
-1
-2
2
3
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
Map placeholder
How to use the Wavefinder 

FREE! Surf-Forecast.com widget for your website

The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our La Posta 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.


Nearest locationNearest