
Surf Forecasts:
Matanzas surf forecast from 12 Sep 2026:
- Best quality surf: Sunday 13 Sep, 12AM (local time) - 4.5ft (1.3m), 8s period, SW swell with cross-offshore winds.
- Most powerful swell: Monday 14 Sep, 12AM (local time) - 4ft (1.2m), 16s period, WSW swell with 715 kJ wave energy.
- Next surfable swell (1★+): Sunday 13 Sep, 12AM (local time) - 4.5ft (1.3m), 8s 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 8s period with a secondary swell of 0.8m 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 1.2m 16s and forecast to arrive on Monday (Sep 14) at 12AM. Winds are predicted to be cross-shore at the time the swell arrives.
| Wave Type | Time (-04) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 12AM (Sun 13th Sep) | 4.5ft (1.3m) 8s |
| Best Surf | 12AM (Sun 13th Sep) | 4.5ft (1.3m) 8s |
| Most Powerful | 12AM (Mon 14th Sep) | 4ft (1.2m) 16s |
Table - best surf conditions forecast for Matanzas over the next 16 days.
The Lowdown
Alright surfers, Rusty here. Let’s get into it. For the next couple of weeks, Matanzas is going to be a bit of a mixed bag, but there are a few golden windows worth paddling out for.
We start off with a nice little pulse of SW swell rolling in on Saturday the 12th, with clean morning conditions. The water temp is sitting at 56°F, which is about average for the time of year, so no surprises there. The morning sees 5ft of SW swell at an 8-second period, which is a bit short and junky, but with a light cross-off breeze it’ll be rideable. The combined energy is moderate (379), so there’s some push. Sunday the 13th is the real standout of the first week. The morning brings a clean 2ft WSW groundswell with a whopping 18-second period. That's proper long-period energy, meaning long, waiting sets, but when they come, they’ll be smooth and lined up perfectly for this reef. It’s a challenge for the paddle-out but the rewards are there. The energy reading is strong (582), so don’t let the small height fool you. Light cross-off wind and clean conditions make this a top pick.
Monday the 14th holds some shape with 4ft of WSW at 14 seconds, but it gets messy in the afternoon. You want the morning sessions this whole week. Tuesday the 15th morning is another clean one with 4ft at 13 seconds, very good surf. Wednesday the 16th is small, only 2ft, but clean. Thursday the 17th morning, it’s glassy with 2ft. Hardly a standout, but sometimes you just need to get wet.
Now, moving into the second week. On Monday the 21st, there’s a clean 5ft, but the period drops to 9 seconds – a bit fickle. The real highlight up ahead is Tuesday the 22nd morning. We get a solid 6ft of SW swell with a 9-second period, and it’s clean with light cross-off winds. The energy is strong (508). That’s your best bet for the later part of the forecast, but remember, this is a long-range call, so keep an eye on it. Thursday the 24th afternoon picks up a clean 3ft with a 12-second period, not big but clean.
There are big gaps of poor afternoons with onshore wind, especially from the 20th to the 24th, where the swell and wind just don’t line up. Don't bother with the afternoons. Stick to the early sessions. A lot of those mornings are clean, and while Matanzas is very consistent, the quality varies.
Where the wind is light and from the SSE or ENE, you get clean cross-off conditions. That’s the ticket here. The swell direction from the SW and WSW is straight into the exposed reef, and since the optimum direction is SW, any of those pulses are hitting it right on the nose. Crowds are a factor here, as it’s reef and it gets busy. Expect company, especially on the good days.
This is Rusty, signing off.
Short Range ForecastMostly dry. Very mild (max 18°C on Mon afternoon, min 9°C on Sat morning). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 20°C on Tue afternoon, min 11°C on Wed 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 | |
Swell Height Map | |||||||||||||||||||||
Wave Height (m) Direction Period (s) | SW 8 | SW 9 | SW 8 | WSW 18 | WSW 17 | WSW 16 | WSW 14 | WSW 14 | WSW 13 | WSW 13 | WSW 12 | WSW 12 | WSW 12 | WSW 12 | WSW 11 | WSW 11 | WSW 13 | WSW 12 | WSW 11 | WSW 11 | WSW 11 |
Wave Graph | |||||||||||||||||||||
346 | 238 | 233 | 280 | 428 | 715 | 687 | 613 | 534 | 476 | 341 | 243 | 96 | 177 | 101 | 90 | 238 | 250 | 214 | 234 | 379 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-on | cross-off | cross-off | cross-on | cross | cross | cross-on | cross | cross-off | cross-on | glassy | cross-off | cross | glassy | glassy | 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 | ||||||||
7:50 | — | — | 7:50 | — | — | 7:48 | — | — | 7:47 | — | — | 7:46 | — | — | 7:43 | — | — | 7:43 | — | — | |
— | 7:36 | — | — | 7:37 | — | — | 7:37 | — | — | 7:37 | — | — | 7:38 | — | — | 7:39 | — | — | 7:39 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 12 | 15 | 13 | 14 | 14 | 12 | 15 | 18 | 15 | 18 | 20 | 15 | 14 | 15 | 12 | 15 | 15 | 13 | 15 | 16 | 13 |
Feels °C | 8 | 10 | 9 | 12 | 10 | 8 | 12 | 14 | 11 | 15 | 17 | 13 | 12 | 13 | 11 | 14 | 13 | 11 | 12 | 12 | 9 |
Swell 1 Height (m) Direction Period (s) | SW 8 | SW 9 | SW 8 | SW 8 | SW 9 | SW 8 | WSW 14 | WSW 14 | WSW 13 | WSW 13 | WSW 12 | WSW 12 | SW 7 | WSW 12 | WSW 11 | WSW 11 | WSW 13 | WSW 12 | SW 7 | WSW 11 | WSW 11 |
346 | 238 | 233 | 256 | 238 | 196 | 687 | 613 | 534 | 476 | 341 | 243 | 64 | 177 | 101 | 90 | 238 | 250 | 103 | 234 | 379 | |
Swell 2 Height (m) Direction Period (s) | WSW 16 | SW 10 | SW 10 | WSW 18 | WSW 17 | WSW 16 | SW 8 | NW 12 | SW 8 | SW 7 | — | SW 7 | WSW 12 | SW 7 | SW 7 | SW 6 | SW 21 | SW 20 | WSW 11 | SW 18 | SW 7 |
27 | 106 | 120 | 280 | 428 | 715 | 211 | 5 | 131 | 102 | — | 65 | 96 | 49 | 35 | 27 | 18 | 15 | 214 | 13 | 99 | |
Swell 3 Height (m) Direction Period (s) | NW 13 | WSW 21 | WSW 20 | W 16 | W 15 | W 13 | NW 12 | — | NW 11 | NW 11 | — | NW 12 | WSW 10 | W 10 | W 15 | WSW 14 | SW 10 | NW 11 | WSW 18 | — | — |
6 | 44 | 149 | 46 | 67 | 87 | 5 | — | 5 | 5 | — | 6 | 36 | 8 | 17 | 61 | 4 | 5 | 34 | — | — | |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | SW 8 | — | — | SW 7 | — | — | — | — | — | SW 5 | SW 5 | — | SW 7 | — |
— | — | — | — | — | — | — | 233 | — | — | 91 | — | — | — | — | — | 22 | 56 | — | 99 | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 229 | 0 | 0 | 60 | 16 | 16 | 291 | 16 | 0 | 60 | 0 | 0 | 55 | 0 | 0 | 60 | 43 | 16 | 364 | 43 |
Best forecast wave conditions in Santiago | |||||||||||||||||||||
Best forecast wave conditions in Chile | |||||||||||||||||||||
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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.










