La Posta Surf Break

Lat Long: 34.92° S 54.85° W

La Posta 48 hour detailed Surf Forecast

Issued: 2 am 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 (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) - 4ft (1.2m), 6s period with SSE swell.

The current surf forecast for La Posta at 6AM is: 1.6m 6s primary swell from a South-southeast direction (forecast issued at 02:00am August 18). 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)4ft (1.2m)6s

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


Short Range Forecast

Light rain (total 4mm), mostly falling on Thu afternoon. Very mild (max 11°C on Wed afternoon, min 7°C on Tue night). Winds increasing (light winds from the ENE on Wed night, strong winds from the SSW by Thu night).

Tuesday
18
Wednesday
19
Thursday
20
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
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
1
0
1
0
0
1
0
0
0
0
0
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.6
SSE
6
1.6
SSE
6
1.6
SSE
6
1.5
SSE
6
1.1
SE
6
1.3
SSE
6
1.1
S
6
1.2
SSE
6
0.9
S
7
0.8
S
7
0.8
S
7
0.7
S
7
0.6
S
7
0.6
S
7
0.5
S
7
0.5
S
7
0.5
S
7
0.5
S
7
0.4
E
8
0.4
S
7
0.3
E
8
0.3
SSE
7
0.4
SE
7
0.5
S
3
Wave Graph
Metric surfscale
Energy kJ
156
173
184
169
93
131
91
107
70
58
58
50
39
39
26
25
24
23
22
14
12
9
12
6
Wind (km/h)
30
SSE
30
SSE
30
SSE
30
SSE
25
SE
20
SE
15
SSE
20
SSE
15
S
10
SSE
10
SSE
5
ESE
10
E
10
E
15
ESE
15
NE
10
NE
5
ENE
10
NE
5
ENE
5
E
10
SE
15
S
15
SSW
Wind State
cross-on
cross-on
on
cross-on
cross-on
cross-on
on
on
on
cross-on
cross-on
cross
cross
cross-off
cross
cross-off
cross-off
cross-off
cross-off
cross-off
cross
cross-on
on
cross-on
High Tide
00:58AM0.19m
5:11AM0.20m
12:13PM0.28m
2:10AM0.18m
6:01AM0.19m
1:07PM0.27m
6:41AM0.18m
2:05PM0.26m
Low Tide
2:44AM0.18m
7:53AM0.18m
8:43PM0.05m
3:23AM0.18m
8:24AM0.18m
9:32PM0.06m
8:36AM0.18m
light rain
light rain
cloud
light rain
cloud
cloud
cloud
cloud
cloud
part cloud
part cloud
cloud
part cloud
part cloud
part cloud
cloud
cloud
cloud
cloud
cloud
light rain
light rain
cloud
cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
7:16
7:15
7:13
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:09
6:09
6:10
 mm
3
2
1
1
2
Temp °C
9
9
9
8
9
9
9
8
8
7
7
8
9
11
10
10
10
11
10
10
10
11
11
11
Feels °C
2
2
3
2
4
5
5
4
5
4
4
6
6
8
7
6
7
9
7
9
9
9
8
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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