Matanzas Surf Break

Lat Long: 33.96° S 71.89° W

Matanzas Surf Forecast and Surf Report

Issued: 1 am 11 Aug 2026 (local time)

Forecast update in  hr  min

Today's Matanzas sea temperature is
13.4° C
0.5° 

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


Matanzas surf forecast from 11 Aug 2026:

  • Best quality surf: Wednesday 12 Aug, 11PM (local time) - 3.5ft (1.0m), 17s period, WSW swell with cross-offshore winds.
  • Most powerful swell: Saturday 15 Aug, 5AM (local time) - 5.5ft (1.7m), 11s period, W swell with 759 kJ wave energy.
  • Next surfable swell (1★+): Tuesday 11 Aug, 8AM (local time) - 4.5ft (1.3m), 12s period with SW swell.

Best Forecast Surf Conditions for Matanzas this week:

The surf forecast for Matanzas over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Tuesday (Aug 11) at 8AM. The primary swell is predicted to be 1.3m and 12s period. The wind is predicted to be cross-offshore as the swell arrives.

The most powerful waves expected at Matanzas in the next 16 days are 1.7m 11s and forecast to arrive on Saturday (Aug 15) at 5AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.3m 2s period and expected on Saturday (Aug 15) at 11PM.

Wave TypeTime (-04) & Date Wave Height & Period
Next good surf (1 star+) 8AM (Tue 11th Aug)4.5ft (1.3m) 12s
Best Surf11PM (Wed 12th Aug)3.5ft (1.0m) 17s
Most Powerful 5AM (Sat 15th Aug)5.5ft (1.7m) 11s

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


The Lowdown

Alright folks, Rusty here, digging into the outlook for the Matanzas region.

Alright, so it’s a bit of a mixed bag ahead. We’ve got a decent run of surf potential, but you’ve got to pick your windows carefully because the wind, especially in the afternoons, is gonna mess things up quite a bit. The first proper swell energy shows up on Tuesday the 11th, but the conditions are rough, so we’ll be skipping that. The real story for the coming week is a period of clean, smaller waves bookended by some stronger, but messier, swells.

We start with a bit of a gap. Tuesday the 11th and Wednesday the 12th are a write-off for decent surf – onshore or cross-shore winds and choppy conditions have the score at zero or nearly zero. You’d be wasting your energy. Thursday the 13th is where we get our first real chance, and it’s a good one.

Thursday the 13th morning is your first standout. The conditions are *glass* – that’s about as good as it gets. The wind is a slight NNE breeze, which is offshore for Matanzas. You’re looking at a 4 ft swell from the WSW, which is the optimum direction for this reef. The period is a solid 16 seconds, so it’s a proper groundswell with good shape, but that long period can make it a bit straight on a beach break, but for a reef like this, it’s prime. The water is sitting at 56°, which is bang on average for the time of year. The combined energy is strong at 675. Get out there early, the crowds are *sometimes* a factor here, and this will be worth it. The afternoon stays clean with a light cross-offshore breeze from the NNE, dropping to a 4 ft swell.

Friday the 14th remains clean through the day with a lighter 4 ft WNW swell in the afternoon and great cross-off winds. Saturday the 15th sees a bigger bump coming through – a 5 ft WNW swell in the morning and 5 ft from the west in the afternoon. It’s clean again, but the combined energy is starting to pump up, hitting 928 in the morning. That’s strong, but the wind is still cross-off, so it’s surfable for decent crew, though the size is getting a bit much for beginners.

Sunday the 16th starts clean with a small 3 ft WSW swell, but the afternoon turns to garbage – strong cross-on southerly wind makes it choppy and poor.

Now, we’ve got a big lull in quality conditions for a few days. Monday and Tuesday the 17th and 18th are completely ruled by strong, wrong winds. The afternoons are all onshore chop.

Wednesday the 19th is the big event for the second week. This is the power swing. The swell jumps to 6 ft from the WSW, and the combined energy is massive – 1415 on the morning. That is very strong energy. The wind is only a light cross-shore, so the surface will be okay, not perfect. The period drops to 14 seconds. This is serious size, over the 5 ft mark, and getting close to the 8 ft expert zone. Definitely one for experienced surfers only. The strong onshore in the afternoon will trash it though.

The rest of the week stays in that 5 ft to 7 ft range but with moderate to fresh cross-shore winds, so it’s going to be lumpy. It’s not a total loss, but Thursday and Friday the 20th and 21st are marginal. Sunday the 23rd sees a drop back to small clean waves, but the real party is over.

The Best on Offer: Without a doubt, Thursday morning the 13th is the pick of the trip. Glassy conditions, a solid 4 ft groundswell from the optimum direction, and that long 16-second period will draw some beautiful lines across the reef. The Wednesday the 19th morning is a close second for the bigger, more powerful crew, but you have to be ready for a much heavier, more challenging wave with very strong energy (1415).

Rusty out.

Short Range Forecast

Some drizzle, heaviest during Thu afternoon. Very mild (max 16°C on Thu afternoon, min 7°C on Tue night). Wind will be generally light.

Days 4-6 Weather Summary

Light rain (total 9mm), mostly falling on Sat afternoon. Very mild (max 14°C on Sat morning, min 10°C on Sun night). Wind will be generally light.

Tuesday
11
Wednesday
12
Thursday
13
Friday
14
Saturday
15
Sunday
16
Monday
17
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
1
0
0
1
1
3
3
3
2
2
2
3
2
2
3
2
0
1
1
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)
1.1
SW
12
1.1
SW
13
0.8
SW
11
0.5
WSW
19
0.9
WSW
18
1.1
WSW
16
1.2
WSW
16
1.1
WSW
15
1
WSW
14
0.8
WSW
13
1.2
WNW
9
1.5
W
12
1.6
WNW
10
1.5
W
10
1
WSW
14
0.9
WSW
13
1
WSW
13
1
WSW
15
1.1
WSW
13
1.2
WSW
13
1.6
SW
9
Wave Graph
Metric surfscale
Energy kJ
344
374
180
203
438
590
654
485
389
204
265
628
588
432
419
304
330
405
408
484
359
Wind (km/h)
10
S
15
SSW
15
S
15
S
20
SSW
10
SE
5
NNE
10
NNE
10
ENE
15
N
10
NE
10
NE
15
NNE
20
N
5
E
5
SE
20
SSW
15
S
20
SSW
20
SSW
15
SSE
Wind State
cross
cross-on
cross
cross
cross
cross-off
glassy
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
off
cross-off
cross-on
cross
cross
cross-on
cross-off
High Tide
9:09AM1.56m
9:48PM0.98m
9:56AM1.62m
10:31PM1.06m
10:40AM1.63m
11:12PM1.13m
11:22AM1.57m
11:53PM1.18m
12:03PM1.46m
00:33AM1.20m
12:42PM1.32m
1:14AM1.20m
1:21PM1.16m
1:56AM1.18m
Low Tide
3:57PM0.01m
3:20AM0.11m
4:38PM-0.05m
4:09AM0.06m
5:16PM-0.06m
4:56AM0.04m
5:53PM-0.04m
5:42AM0.07m
6:27PM0.01m
6:29AM0.14m
7:01PM0.10m
7:18AM0.23m
7:34PM0.19m
clear
clear
clear
clear
clear
clear
cloud
light rain
cloud
part cloud
cloud
cloud
rain showers
mod rain
light rain
cloud
part cloud
clear
part cloud
part cloud
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
7:30
7:28
7:28
7:26
7:26
7:24
7:24
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:15
6:15
6:15
6:16
6:16
6:17
6:19
 mm
1
1
7
1
Temp °C
10
11
10
10
12
11
15
16
12
13
13
13
14
13
14
13
14
12
12
12
12
Feels °C
7
8
6
5
7
7
14
14
11
11
11
12
12
9
12
12
11
9
8
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)
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Information about the Matanzas Surf forecast

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

Matanzas is 47 km (29 miles) from the city of San Antonio. If you plan a holiday in Santiago, look for hotels and other accommodation in San Antonio. San Antonio has rooms for a wide range of budgets as well as car hire and transport links.

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