La Posta Surf Break

Lat Long: 34.92° S 54.85° W

La Posta 48 hour detailed Surf Forecast

Issued: 8 pm 17 Aug 2026 (local time)

Forecast update in  hr  min

Today's La Posta sea temperature is
11.2° 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 (18 Aug):

  • Morning surf: Morning surf (18 Aug, local time) - 5ft (1.5m), 6s period with SSE swell.
  • Afternoon surf: Afternoon surf (18 Aug, local time) - 4.5ft (1.3m), 6s period with SSE swell.
  • Evening surf: Evening surf (18 Aug, local time) - 3.5ft (1.1m), 6s period with S swell.

The current surf forecast for La Posta at 1AM is: 1.5m 6s primary swell from a South-southeast direction and 0.3m 6s secondary swell from a Southwest direction (forecast issued at 08:00pm August 17). An open ocean swell of 0.5m 10s is not directed at the surf break. The wind direction is predicted to be onshore.

Time (-03) & DateWave HeightWave Period
Morning (18 Aug)5ft (1.5m)6s
Afternoon (18 Aug)4.5ft (1.3m)6s
Evening (18 Aug)3.5ft (1.1m)6s

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


Short Range Forecast

Moderate rain (total 17mm), heaviest on Mon night. Very mild (max 11°C on Wed night, min 7°C on Tue night). Winds decreasing (fresh winds from the SSE on Mon night, light winds from the ENE by Thu morning).

Mon
17
Tuesday
18
Wednesday
19
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)
0.7
E
10
1.5
SSE
6
1.5
SSE
6
1.4
SSE
6
1.6
SSE
6
1.5
SSE
6
1.2
SE
6
1.3
SSE
6
1.2
SSE
6
1.1
S
6
1.1
S
7
0.8
S
7
0.8
S
7
0.7
S
7
0.7
S
7
0.6
S
7
0.5
S
7
0.5
S
7
Wave Graph
Metric surfscale
Energy kJ
96
129
148
135
178
169
106
131
104
86
123
55
55
50
51
38
26
25
Wind (km/h)
30
SSE
30
SSE
30
SSE
30
SSE
30
SSE
30
SSE
30
SE
15
SSE
20
SSE
20
SSE
10
S
15
SSE
10
SSE
10
SE
10
E
10
ESE
10
E
15
E
Wind State
cross-on
on
cross-on
on
on
on
cross-on
on
on
on
on
on
cross-on
cross-on
cross
cross
cross
cross
High Tide
00:58AM0.19m
5:11AM0.20m
12:13PM0.28m
2:10AM0.18m
6:01AM0.19m
1:07PM0.27m
Low Tide
7:53PM0.04m
2:44AM0.18m
7:53AM0.18m
8:43PM0.05m
3:23AM0.18m
8:24AM0.18m
light rain
light rain
light rain
rain showers
cloud
cloud
cloud
cloud
cloud
cloud
cloud
part cloud
part cloud
clear
clear
part cloud
clear
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
7:16
7:15
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:08
6:09
6:09
 mm
4
3
4
1
Temp °C
10
9
9
9
9
8
8
9
8
8
8
7
7
7
9
10
10
9
Feels °C
4
3
3
3
3
1
2
6
3
4
5
3
4
4
6
7
7
6
  • 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.


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