Las Cuevas Surf Break

Lat Long: 38.21° S 57.70° W

Las Cuevas Surf Forecast and Surf Report

Issued: 2 pm 17 Aug 2026 (local time)

Forecast update in  hr  min

Today's Las Cuevas sea temperature is
10.2° C
1.8° 

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


Las Cuevas surf forecast from 17 Aug 2026:

  • Best quality surf: Monday 24 Aug, 3AM (local time) - 8ft (2.4m), 14s period, SSE swell with glassy winds.
  • Most powerful swell: Monday 24 Aug, 6AM (local time) - 8ft (2.5m), 14s period, SSE swell with 2,287 kJ wave energy.
  • Next surfable swell (1★+): Tuesday 18 Aug, 6PM (local time) - 1.5ft (0.5m), 10s period with E swell.

Best Forecast Surf Conditions for Las Cuevas this week:

The surf forecast for Las Cuevas over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Tuesday (Aug 18) at 6PM. The primary swell is predicted to be 0.7m and 7s period with a secondary swell of 0.5m and 10s. The wind is predicted to be glassy as the swell arrives.

The most powerful waves expected at Las Cuevas in the next 16 days are 2.5m 14s and forecast to arrive on Monday (Aug 24) at 6AM. Winds are predicted to be glassy at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.6m 4s period and expected on Monday (Aug 24) at 9PM.

Wave TypeTime (-03) & Date Wave Height & Period
Next good surf (1 star+) 6PM (Tue 18th Aug)1.5ft (0.5m) 10s
Best Surf 3AM (Mon 24th Aug)8ft (2.4m) 14s
Most Powerful 6AM (Mon 24th Aug)8ft (2.5m) 14s

Table - best surf conditions forecast for Las Cuevas over the next 16 days.


The Lowdown

Alright, folks, Rusty here. Let’s get into it.

Alright, let’s be straight with you. The next couple of weeks are looking pretty grim for a paddle. We’ve got a long stretch of small, weak, and messy surf ahead, with a whole lot of "poor surf conditions" dominating the forecast. The first real glimmer of hope doesn’t show up until Monday the 24th of August, but even then, it’s not for the faint of heart.

The water is currently sitting at 50° – that’s a touch warmer than normal for this time of year, which is a nice little bonus if you’re out there, but you’ll be bobbing around on tiny waves.

The first few days, from the 17th through the 23rd, are a write-off. We’re looking at weak, short-period windswell under 3 ft, with cross and cross-onshore winds ruining any chance of a decent wave. The combined wave energy is pathetic, barely cracking 200 (173) on the best of those days. Don’t even bother.

Things pick up a bit on Friday the 21st and into the weekend, with swell hitting 5 ft, but the wind is howling from the south at 18-22 mph. It’s lumpy, choppy, and just plain ugly. The energy jumps up a bit (429-933), but it’s a total mess. This is kite-surfing weather, not surfing weather.

The big standout, the only real highlight in the whole 16 days, is Monday the 24th of August. The swell jumps to 8 ft from the SSE with a proper 13-second period – that’s a long-period groundswell, bringing real energy. The combined wave energy is a massive 1872, so there’s plenty of power. The winds go light from the north, giving us a cross-offshore flow. The report says "excellent surf conditions for experienced surfers," and that’s exactly what it is. This is a big, powerful swell. At 8 ft, this is expert territory. It’s not for beginners. The long period means it’ll wall up nicely at Las Cuevas, but it’s a reef break, so you need to know what you’re doing. Keep in mind, with that size and power, crowds are possible.

The rest of the week after that drops off quickly. Tuesday the 25th still has some clean, cross-off waves from the SSE at 4 ft, with moderate energy (478), but it’s a big step down from Monday. By Wednesday and Thursday it’s back to tiny, weak stuff under 3 ft.

So, the call is simple: if you’re an experienced surfer, you wait for Monday the 24th of August. That’s your day. Everything else is a no-go or a downgrade. The second week of September looks like a ghost town, with nothing but onshore wind and tiny, weak swell.

Rusty.

Short Range Forecast

Mostly dry. Very mild (max 16°C on Wed afternoon, min 7°C on Mon night). Winds decreasing (fresh winds from the SSW on Mon afternoon, calm by Tue afternoon).

Days 5-7 Weather Summary

Light rain (total 2mm), mostly falling on Fri night. Very mild (max 15°C on Thu afternoon, min 6°C on Thu night). Winds increasing (light winds from the SSW on Thu afternoon, strong winds from the SW by Fri night).

Mon
17
Tuesday
18
Wednesday
19
Thursday
20
Friday
21
Saturday
22
Sunday
23
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
0
0
0
0
1
0
0
0
0
0
0
0
0
0
0
0
1
0
0
3
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.8
E
9
1.1
SSW
7
0.8
S
7
0.6
E
10
0.5
E
9
0.4
E
9
0.4
ENE
9
0.4
ENE
9
0.3
ENE
9
0.3
ENE
8
1.3
S
6
1.4
S
7
1.6
S
9
2.2
S
11
2.4
S
9
2.2
S
10
2.3
S
10
2.1
S
10
1.6
S
10
2.2
SSE
14
Wave Graph
Metric surfscale
Energy kJ
109
108
62
68
41
25
25
26
15
14
110
176
422
1107
921
932
1076
843
464
1856
Wind (km/h)
30
SSW
20
SSW
15
SSW
5
SSW
15
NW
15
NW
15
WNW
15
NNW
20
NW
15
SSW
30
SSE
30
S
35
SSW
35
SW
35
SSW
30
SW
35
SW
35
SSW
25
SSW
10
SSW
Wind State
cross-on
cross-on
cross
cross
off
off
off
off
off
cross
on
cross-on
cross-on
cross
cross
cross
cross-off
cross-on
cross-on
cross
High Tide
10:56PM1.23m
11:13AM1.17m
11:46PM1.11m
11:55AM1.17m
00:39AM1.01m
12:38PM1.15m
1:35AM0.92m
1:23PM1.13m
2:37AM0.86m
2:14PM1.10m
3:44AM0.82m
3:12PM1.10m
Low Tide
5:19PM0.23m
5:47AM0.30m
6:08PM0.23m
6:21AM0.39m
6:57PM0.25m
6:53AM0.47m
7:46PM0.28m
7:25AM0.53m
8:37PM0.31m
8:01AM0.58m
9:35PM0.33m
8:43AM0.61m
10:38PM0.34m
cloud
part cloud
clear
clear
clear
clear
clear
part cloud
part cloud
part cloud
part cloud
cloud
cloud
light rain
part cloud
part cloud
cloud
cloud
part cloud
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
7:31
7:31
7:30
7:28
7:26
7:26
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:15
6:16
6:16
6:17
6:19
6:20
6:21
 mm
2
Temp °C
8
7
8
10
11
12
16
14
14
15
8
7
7
8
8
8
8
8
7
7
Feels °C
1
1
5
8
6
8
12
9
10
11
0
-1
-2
-1
-1
0
-1
-1
1
2
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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 Las Cuevas Surf forecast

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

Are you planning a holiday in Provincia de Buenos Aires? If you are looking for accommodation near Las Cuevas, camping, hotels and holiday cottages in Provincia de Buenos Aires, consider staying in Mar del Plata which is 26 km (16 miles) away. Alternatively, find information about places to stay and car hire in Quequen which is 95 km (59 miles) away

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