La Posta Surf Break

Lat Long: 34.92° S 54.85° W

La Posta 48 hour detailed Surf Forecast

Issued: 8 pm 18 Aug 2026 (local time)

Forecast update in  hr  min

Today's La Posta sea temperature is
11.3° 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 (19 Aug):

  • Morning surf: Morning surf (19 Aug, local time) - 2.5ft (0.7m), 7s period with S swell.
  • Afternoon surf: Afternoon surf (19 Aug, local time) - 2ft (0.6m), 7s period with S swell.
  • Evening surf: Evening surf (19 Aug, local time) - 1.5ft (0.4m), 9s period with E swell.

The current surf forecast for La Posta at 12AM is: 0.9m 7s primary swell from a South direction and 0.6m 6s secondary swell from a East-southeast direction (forecast issued at 08:00pm August 18). The wind direction is predicted to be onshore.

Time (-03) & DateWave HeightWave Period
Morning (19 Aug)2.5ft (0.7m)7s
Afternoon (19 Aug)2ft (0.6m)7s
Evening (19 Aug)1.5ft (0.4m)9s

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


Short Range Forecast

Heavy rain (total 20mm), heaviest during Thu afternoon. Very mild (max 11°C on Thu night, min 7°C on Tue night). Winds increasing (light winds from the ENE on Wed night, strong winds from the S by Thu night).

Tue
18
Wednesday
19
Thursday
20
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
1
1
0
1
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)
1.2
SSE
6
1.3
SSE
6
0.9
S
7
0.9
S
7
0.8
S
7
0.7
S
7
0.6
S
7
0.6
S
7
0.5
S
7
0.4
E
9
0.5
S
7
0.4
E
8
0.5
E
8
0.4
S
7
0.3
SSW
6
0.6
SE
4
0.7
SE
4
0.6
ESE
4
Wave Graph
Metric surfscale
Energy kJ
107
121
69
73
58
50
39
38
26
25
23
22
35
14
8
10
16
12
Wind (km/h)
20
SSE
15
SE
10
SSE
10
S
10
SSE
10
ESE
10
ESE
10
ESE
15
ENE
5
ENE
15
E
15
ENE
15
E
15
ESE
15
SE
20
SE
20
S
20
SW
Wind State
cross-on
cross-on
on
on
cross-on
cross-on
cross
cross
cross-off
cross-off
cross
cross-off
cross
cross
cross-on
cross-on
on
cross-on
High Tide
2:10AM0.18m
6:01AM0.19m
1:07PM0.27m
6:41AM0.18m
2:05PM0.26m
Low Tide
8:43PM0.05m
3:23AM0.18m
8:24AM0.18m
9:32PM0.06m
8:36AM0.18m
light rain
cloud
cloud
part cloud
clear
clear
cloud
part cloud
part cloud
cloud
cloud
cloud
light rain
light rain
light rain
mod rain
light rain
cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
7:15
7:13
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:09
6:09
6:10
 mm
1
1
2
5
8
4
Temp °C
8
8
8
8
7
7
9
10
10
10
10
10
9
10
10
10
10
11
Feels °C
4
4
5
5
4
4
6
7
7
8
7
7
6
7
7
7
6
7
  • 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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