Matanzas Surf Break

Lat Long: 33.96° S 71.89° W

Matanzas Surf Forecast and Surf Report

Issued: 2 pm 11 Sep 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 Sep 2026:

  • Best quality surf: Monday 14 Sep, 12AM (local time) - 4ft (1.2m), 16s period, WSW swell with cross-offshore winds.
  • Most powerful swell: Friday 18 Sep, 3PM (local time) - 6.5ft (2.0m), 12s period, WSW swell with 1,026 kJ wave energy.
  • Next surfable swell (1★+): Saturday 12 Sep, 6AM (local time) - 5.5ft (1.7m), 8s period with WSW 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 Saturday (Sep 12) at 6AM. The primary swell is predicted to be 1.7m and 8s 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 2.0m 12s and forecast to arrive on Friday (Sep 18) at 3PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.2m 2s period and expected on Wednesday (Sep 16) at 3PM.

Wave TypeTime (-04) & Date Wave Height & Period
Next good surf (1 star+) 6AM (Sat 12th Sep)5.5ft (1.7m) 8s
Best Surf12AM (Mon 14th Sep)4ft (1.2m) 16s
Most Powerful 3PM (Fri 18th Sep)6.5ft (2.0m) 12s

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


The Lowdown

Alright folks, Rusty here. Let's suss out what's on the cards for our local stretch over the next couple of weeks. We've got a long period to look at, and it's a bit of a mixed bag, but there are definitely some windows of clean surf to get excited about.

The main story is a series of WSW groundswells rolling in, with the water temp a pretty standard 56°F, so nothing out of the ordinary for this time of year. The first few days are a write-off really, with a moderate onshore wind messing up what little swell there is. We don't see anything worth paddling out for until Saturday morning, September 12th. The early session looks alright, with a clean 5ft of SW swell, light cross-off winds from the SSE, and the water is clean. But the tide or something keeps it from being a classic. It's a starter, not a standout.

Now, Sunday morning, September 13th, now we're talking. The swell drops a bit to 2ft, but it’s a long-period, powerful groundswell from the WSW with a period of 18 seconds. The combined energy is pumping (582), and with a slight air and cross-off wind, it’s going to be glassy and perfect. This is the kind of morning where you chew your breakfast fast to get in the water. Matanzas can handle this long period stuff nicely, and the sets will be clean and lined up.

The run of clean mornings continues, with Monday the 14th and Tuesday the 15th offering similar vibes: waist-to-chest high WSW swell, light offshore breezes, and clean conditions. These are solid, workable mornings for intermediate surfers. The surf is very consistent, so you won't be waiting around long between sets.

Things start to get a bit more ordinary by the afternoons and into the mid-week, with the wind swinging onshore and making things choppy. But keep an eye on Saturday morning, September 19th. We've got a bigger pulse of 6ft from the WSW, only 9-second period, but the wind is light and offshore from the SSE again, making for clean, punchy waves. The combined energy is a solid 605, so there's plenty of push. It's a bit bigger, so it'll be a step up for some, but for those comfortable in that size, it’s a great option.

After that, the forecast gets a bit wonky. The wind is mostly cross-shore or onshore, creating lumpy conditions. There's a bump of energy on the 18th afternoon (7ft at 12 seconds) but the onshore wind makes it less appealing for surfing, maybe more of a kite session. The window from around September 21st to the 26th is full of onshore winds and choppy surf, with not much to get excited about for a clean wave. There might be a few rideable mornings, but nothing that'll have you ringing in sick for work.

The best bet by far is Sunday morning, September 13th. It’s the cleanest, glassiest period of the whole forecast. The swell is small but mighty with that long period and the direction from the WSW is right in the pocket. Get it while it's good.
Rusty.

Short Range Forecast

Mostly dry. Very mild (max 16°C on Mon morning, min 8°C on Fri night). Winds decreasing (fresh winds from the SSW on Fri afternoon, light winds from the SE by Sun morning).

Days 5-7 Weather Summary

Mostly dry. Very mild (max 19°C on Mon afternoon, min 12°C on Tue night). Winds decreasing (fresh winds from the SSW on Mon night, calm by Tue night).

Fri
11
Saturday
12
Sunday
13
Monday
14
Tuesday
15
Wednesday
16
Thursday
17
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
0
1
2
0
3
3
1
4
3
2
2
3
0
2
2
0
0
1
0
1
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.9
WSW
12
1.7
WSW
9
1.6
SW
8
1.3
SW
9
1.3
SW
9
0.7
WSW
18
0.9
WSW
17
1.2
WSW
16
1.3
WSW
14
1.3
WSW
14
1.3
WSW
13
1.2
WSW
13
1.1
WSW
13
1
WSW
12
0.8
WSW
12
0.7
SW
12
0.8
WSW
11
0.7
WSW
9
0.9
WSW
13
0.9
WSW
12
Wave Graph
Metric surfscale
Energy kJ
231
465
346
262
269
280
428
715
697
613
534
476
389
289
180
142
130
76
253
271
Wind (km/h)
25
SW
20
S
10
SSE
20
SSW
10
SSE
5
SE
15
SW
10
SSE
10
SSE
15
S
15
S
10
SSE
10
SW
5
NNE
10
NE
10
WNW
10
S
5
SSE
15
SW
15
SSW
Wind State
cross-on
cross
cross-off
cross
cross-off
cross-off
cross-on
cross-off
cross-off
cross
cross
cross-off
cross-on
cross-off
cross-off
on
cross
cross-off
cross-on
cross
High Tide
11:45PM1.27m
11:57AM1.41m
00:20AM1.31m
12:34PM1.30m
00:55AM1.33m
1:10PM1.17m
1:31AM1.31m
1:47PM1.03m
2:09AM1.26m
2:27PM0.90m
2:51AM1.18m
3:15PM0.78m
Low Tide
5:40PM-0.03m
5:43AM0.04m
6:12PM0.01m
6:26AM0.07m
6:41PM0.08m
7:09AM0.13m
7:11PM0.16m
7:53AM0.21m
7:40PM0.26m
8:42AM0.31m
8:10PM0.35m
9:43AM0.40m
8:45PM0.44m
clear
clear
clear
clear
clear
clear
clear
part cloud
clear
clear
clear
clear
clear
clear
clear
part cloud
part cloud
clear
cloud
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
7:50
7:50
7:48
7:47
7:46
7:43
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:36
7:36
7:37
7:37
7:37
7:38
7:39
 mm
Temp °C
13
11
12
15
13
14
15
13
16
19
15
17
19
14
15
16
13
15
16
13
Feels °C
7
6
8
10
9
11
11
11
13
15
12
15
17
14
14
15
12
13
13
9
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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 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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