Matanzas Surf Break

Lat Long: 33.96° S 71.89° W

Matanzas Surf Forecast and Surf Report

Issued: 8 am 15 Sep 2026 (local time)

Forecast update in  hr  min

Today's Matanzas sea temperature is
13.3°C
0.4° 

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


Matanzas surf forecast from 15 Sep 2026:

  • Best quality surf: Monday 21 Sep, 3AM (local time) - 5.5ft (1.7m), 10s period, WSW swell with cross-offshore winds.
  • Most powerful swell: Thursday 17 Sep, 9PM (local time) - 4.5ft (1.4m), 12s period, WSW swell with 545 kJ wave energy.
  • Next surfable swell (1★+): Thursday 17 Sep, 6AM (local time) - 4ft (1.2m), 7s 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 Thursday (Sep 17) at 6AM. The primary swell is predicted to be 1.2m and 7s period with a secondary swell of 0.5m and 11s. 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 1.4m 12s and forecast to arrive on Thursday (Sep 17) at 9PM. Winds are predicted to be cross-onshore at the time the swell arrives.

Wave TypeTime (-04) & Date Wave Height & Period
Next good surf (1 star+) 6AM (Thu 17th Sep)4ft (1.2m) 7s
Best Surf 3AM (Mon 21st Sep)5.5ft (1.7m) 10s
Most Powerful 9PM (Thu 17th Sep)4.5ft (1.4m) 12s

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


The Lowdown

Alright, Rusty here. Let's take a good look at what's coming down the line for Matanzas.

Alright, listen up. The next few days at Matanzas are a bit of a mixed bag, not gonna lie. But we've got some serious potential brewing, especially if you're an experienced surfer looking for a proper slab. The water's sitting at 56°, which is pretty much spot on for this time of year, so you won't need the 5/4 just yet.

We kick things off on Tuesday morning, September 15th. The swell is a modest 4ft from the WSW with a solid 13-second period. The wind is a light cross-offshore from the SSE, making for clean, glassy conditions. The wave energy is moderate at 544. It's not a day for the record books, but it's a fun, clean start with some decent push from that groundswell. The afternoon turns a bit ugly though, with a cross-onshore wind messing things up.

Wednesday is a write-off with weak, choppy surf. Thursday the 17th brings a bit of hope back in the morning with clean 4ft surf on a cross-offshore breeze, but the period drops right off to 6 seconds. That's a weak windswell, so the waves will be fat and crumbly. Not great. Friday and the weekend see a bit of a trough, with small, messy waves, though Saturday morning the 19th turns absolutely glassy with 3ft surf – a nice window for a longboard or a log if you're keen on a quiet paddle.

Now, let’s talk about the real show. It's building. The morning of Thursday, September 24th, is when things get seriously interesting. We're looking at 5ft of groundswell, a 11-second period from the W, and dead glassy conditions. The wave energy is pumping at 630. That is going to be clean, lined-up, and thumping. This is a standout morning.

But the absolute pick of the entire run is the morning of Saturday, September 26th. I’m talking 8ft from the W with a 13-second period. The wind is virtually dead from the north – a slight air. Combined wave energy is a massive 2375. That is expert territory. That's a big, powerful, long-period groundswell hammering a reef. If you don't have your wits about you, it will spit you out. This is for the experienced crew only. The morning of Friday the 25th is also a serious runner-up, with 7ft clean waves and a cross-offshore breeze – a good warm-up for the Saturday beast.

After that, the swell hangs around through the start of the next week, but the winds get messy again, making things choppy and hard to manage. There’s a brief, clean 3ft surge on the 30th, but it's crossed up with a moderate breeze.

So, to bottom line it for you: don't stress about the small stuff this week. The standout is crystal clear: the morning of Saturday, September 26th, for a proper, expert-level session. The morning of September 24th is your best bet for slightly smaller, but still excellent, waves. Surf wise, that's it. The rest is mostly filler or blown out. Keep your eyes on that Saturday. This one’s gonna be special if you can handle it.

- Rusty

Short Range Forecast

Mostly dry. Very mild (max 18°C on Thu morning, min 12°C on Thu night). Wind will be generally light.

Days 4-6 Weather Summary

Mostly dry. Very mild (max 18°C on Fri morning, min 12°C on Fri morning). Wind will be generally light.

Tuesday
15
Wednesday
16
Thursday
17
Friday
18
Saturday
19
Sunday
20
Monday
21
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
3
0
1
0
0
0
2
0
2
1
0
1
2
1
1
2
0
2
1
0
2
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
WSW
13
1.1
WSW
12
1
WSW
12
0.6
WSW
12
0.7
SW
12
0.7
WSW
11
1.1
SW
6
0.9
WSW
13
0.9
WSW
12
0.9
WSW
11
0.9
WSW
11
0.9
WSW
10
0.9
WSW
10
1.4
WSW
11
1.3
WSW
11
1.1
WSW
10
1
WSW
10
1.6
WSW
10
1.5
W
9
1.6
WSW
9
1.4
WSW
10
Wave Graph
Metric surfscale
Energy kJ
476
336
289
94
142
103
91
289
199
214
206
195
157
483
427
260
190
502
405
400
370
Wind (km/h)
10
SSE
15
SW
15
S
15
SSW
20
SSW
20
S
10
SSE
20
SW
0
S
10
S
10
WSW
10
S
0
NNE
10
NW
5
NNW
10
ENE
5
NW
10
S
10
S
15
SSW
10
SSE
Wind State
cross-off
cross-on
cross
cross-on
cross
cross
cross-off
cross-on
glassy
cross
cross-on
cross
glassy
cross-on
cross
cross-off
cross-on
cross
cross
cross
cross-off
High Tide
1:47PM1.03m
2:09AM1.26m
2:27PM0.90m
2:51AM1.18m
3:15PM0.78m
3:46AM1.11m
4:31PM0.69m
5:04AM1.05m
6:42PM0.67m
6:37AM1.06m
8:13PM0.72m
7:49AM1.11m
8:56PM0.79m
Low Tide
7:40PM0.26m
8:42AM0.31m
8:10PM0.35m
9:43AM0.40m
8:45PM0.44m
11:10AM0.46m
9:39PM0.52m
12:58PM0.45m
11:25PM0.56m
2:11PM0.39m
1:05AM0.53m
2:56PM0.31m
2:07AM0.45m
clear
clear
clear
cloud
part cloud
clear
clear
part cloud
part cloud
part cloud
part cloud
clear
clear
cloud
cloud
cloud
cloud
part cloud
cloud
part cloud
cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
7:47
7:46
7:43
7:43
7:41
7:39
7:39
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:37
7:38
7:39
7:39
7:40
7:42
7:43
 mm
Temp °C
17
17
14
17
17
15
18
18
13
18
16
16
18
17
14
16
17
16
17
17
15
Feels °C
15
14
11
15
13
11
16
15
12
17
14
14
16
15
13
15
15
13
14
14
12
  • 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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