Matanzas Surf Break

Lat Long: 33.96° S 71.89° W

Matanzas Surf Forecast and Surf Report

Issued: 2 am 12 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 12 Sep 2026:

  • Best quality surf: Sunday 13 Sep, 3AM (local time) - 5ft (1.6m), 8s period, SW swell with cross-offshore winds.
  • Most powerful swell: Friday 18 Sep, 9PM (local time) - 6ft (1.9m), 11s period, SW swell with 836 kJ wave energy.
  • Next surfable swell (1★+): Sunday 13 Sep, 12AM (local time) - 4.5ft (1.3m), 9s 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 Sunday (Sep 13) at 12AM. The primary swell is predicted to be 1.3m and 9s period with a secondary swell of 0.6m and 10s. 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 1.9m 11s and forecast to arrive on Friday (Sep 18) at 9PM. Winds are predicted to be cross-shore 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 9AM.

Wave TypeTime (-04) & Date Wave Height & Period
Next good surf (1 star+)12AM (Sun 13th Sep)4.5ft (1.3m) 9s
Best Surf 3AM (Sun 13th Sep)5ft (1.6m) 8s
Most Powerful 9PM (Fri 18th Sep)6ft (1.9m) 11s

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


The Lowdown

Yo, Rusty here. Let’s talk about Matanzas. This reef break is exposed to the southwest, and we’ve got a run of surf coming through the next couple weeks. The water temp is sitting at 56°F, which is pretty normal for this time of year, so nothing crazy there.

We start off Saturday the 12th with a 5ft SW swell, period 8 seconds – short period, but enough for a fun morning session. The cross-offshore breeze is light at 6 mph and it’s clean. It’s not huge, but it’s a solid intro. The afternoon goes choppy though, so get it early.

Sunday the 13th morning drops to 2ft from the WSW, but check this – period jumps to 18 seconds. That’s very long period groundswell. The energy reading is 576 (moderate), and with clean, light cross-off winds, this will be lined up and smooth. This is a standout morning – long period suits reefs like Matanzas, and it’ll be pure. Afternoon turns onshore and choppy for Sunday.

Monday the 14th morning brings 4ft from the WSW, period 14 seconds (still long), with energy at 935 (moderate to strong) and light cross-off winds. Another cracking morning. The sets will have heaps of push and the surface will be clean. This is your other top pick early in the run.

Tuesday the 15th morning has 4ft WSW, 13 seconds, energy 578, and again light cross-off winds – another very good session. The pattern holds: mornings are where it’s at. Each afternoon goes onshore and messy.

Wednesday the 16th morning has dropped to 3ft WSW, period 12 seconds, but the wind is glassy – NNE at 3 mph. That’s a major positive. The energy is lower at 239 (weak), but those clean, glassy conditions will make it super user-friendly.

From Thursday the 17th through Saturday the 21st, the surf quality takes a hit. Mornings only go marginal, with cross-shore or cross-on winds and energy hovering around 178-387 (weak to moderate). It’s choppy on the afternoons. There is a run of poor to ordinary conditions here for about five days – the windows are tight.

Sunday the 22nd morning gives you 3ft WSW, 10 seconds, with SSE light cross-off at 6 mph – surfable but ordinary.

Monday the 23rd morning is glassy again (NE 0 mph) with a 3ft SW swell, period just 7 seconds. The energy is 199 (weak). It’s clean, but short period will be a little weak.

The good news picks up Friday the 25th – both morning and afternoon see glassy conditions with 3ft and 3ft from the W/WSW, period 10 seconds, energy 258-264 (weak). Clean and surfable. Then Saturday the 26th morning has 4ft W swell, 11 seconds, glassy and calm – that’s another really good, clean session. The afternoon goes onshore again.

Sunday the 27th closes the window with poor conditions on both sessions – fresh cross-onshore winds up to 22 mph, lumpy and messy. Not worth it.

So, the real standouts here are the mornings of Sunday the 13th and Monday the 14th – long period groundswell, clean winds, good energy. Those are the ones to circle. The glassy mornings of Wednesday the 16th and Saturday the 26th are also worth a paddle for clean, smaller waves. Crowds at Matanzas are sometimes an issue, but on those standout mornings it’ll be worth dealing with.

Rusty.

Short Range Forecast

Mostly dry. Very mild (max 18°C on Mon afternoon, min 8°C on Sat morning). Wind will be generally light.

Days 4-6 Weather Summary

Mostly dry. Very mild (max 19°C on Tue afternoon, min 12°C on Tue night). Wind will be generally light.

Saturday
12
Sunday
13
Monday
14
Tuesday
15
Wednesday
16
Thursday
17
Friday
18
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
2
0
2
3
0
2
3
1
3
3
0
2
2
1
1
0
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)
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
1.2
WSW
13
1.2
WSW
13
1.1
WSW
12
0.9
WSW
12
0.8
WSW
12
0.8
WSW
12
0.7
WSW
11
0.7
WSW
11
0.8
WSW
11
0.9
WSW
12
1
WSW
11
1.3
WSW
12
1.8
SW
11
Wave Graph
Metric surfscale
Energy kJ
346
238
262
280
428
715
697
613
462
476
336
243
180
177
101
101
135
250
234
475
757
Wind (km/h)
10
SSE
20
SSW
10
SSE
10
SE
15
SW
15
S
10
SSE
20
SSW
15
SSE
10
SSE
15
SSW
0
SW
5
NNE
10
NW
5
S
10
S
15
SW
20
SSW
10
S
20
SW
20
SSW
Wind State
cross-off
cross-on
cross-off
cross-off
cross-on
cross
cross-off
cross
cross-off
cross-off
cross-on
glassy
glassy
cross-on
glassy
cross
cross-on
cross
cross
cross-on
cross
High Tide
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
3:46AM1.11m
4:31PM0.69m
Low Tide
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
11:10AM0.46m
9:39PM0.52m
clear
clear
clear
clear
clear
part cloud
clear
clear
clear
clear
clear
clear
clear
part cloud
clear
clear
part cloud
clear
clear
clear
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
7:43
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:36
7:37
7:37
7:37
7:38
7:39
7:39
 mm
Temp °C
12
15
13
14
15
12
16
18
15
18
19
14
15
16
13
16
16
13
16
16
12
Feels °C
8
10
9
11
12
8
13
14
12
15
16
13
14
15
12
14
14
9
14
13
8
  • Map Icons:
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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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