
Surf Forecasts:
Matanzas surf forecast from 11 Sep 2026:
- Best quality surf: Sunday 13 Sep, 12AM (local time) - 4.5ft (1.3m), 9s period, SW swell with cross-offshore winds.
- Most powerful swell: Monday 14 Sep, 9AM (local time) - 4.5ft (1.4m), 14s period, WSW swell with 789 kJ wave energy.
- Next surfable swell (1★+): Friday 11 Sep, 9AM (local time) - 3.5ft (1.0m), 12s 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 Friday (Sep 11) at 9AM. The primary swell is predicted to be 1.0m and 12s period with a secondary swell of 0.4m and 5s. 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 14s and forecast to arrive on Monday (Sep 14) at 9AM. 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+) | 9AM (Fri 11th Sep) | 3.5ft (1.0m) 12s |
| Best Surf | 12AM (Sun 13th Sep) | 4.5ft (1.3m) 9s |
| Most Powerful | 9AM (Mon 14th Sep) | 4.5ft (1.4m) 14s |
Table - best surf conditions forecast for Matanzas over the next 16 days.
The Lowdown
G’day, Rusty here. Looks like we’ve got a bit of a slow burner on our hands at Matanzas, but once it gets going, there’s some proper gold to be had.
The overall pattern is a bit of a mixed bag. Early on, the swell is small and clean but nothing to write home about. Then it starts to build, but the wind gets messy through the middle of the period. The real standout is going to be Sunday the 13th – that morning session is the pick of the whole run.
Alright, let’s get into it.
We kick off Friday the 11th with a clean 1.0m groundswell from the WSW at 12 seconds (moderate energy at 307). The wind is a light cross-off from the SSE, so it’s clean but pretty small. Matanzas is a very consistent reef break, exposed to the SW, so it needs a bit more push. That said, it’s a nice gentle start.
Saturday the 12th sees the swell jump to 1.7m from the SW, but the period drops to 8 seconds – shorter period windswell. The morning is clean with a light cross-off, so it’s surfable. Not the best shape, but worth a paddle.
Now for the real standout: Sunday the 13th morning. We’ve got 1.4m from the SW, period 8 seconds, but the winds are light from the SE, cross-off, and it’s clean. The combined energy is strong at 612 – you can feel the push. This is the best on offer. Expect fun, punchy lefts off the reef. Crowds are sometimes an issue here, so you might want to get in early.
The afternoon on Sunday turns a bit tricky – the swell drops back to 0.9m from the WSW, period jumps to 17 seconds (very long period groundswell), but the wind goes cross-on. That long period tends to make beach breaks close out, but Matanzas as a reef can handle it. Just a bit bumpy.
From Monday the 14th through to Friday the 18th it’s a bit of a struggle. The swell hangs around 1.0m to 1.4m, but the wind is mostly cross or cross-onshore, creating chop. The energy readings are moderate (around 300-500 range), but the quality just isn’t there. A few mornings offer a tiny window of cleaner conditions, but nothing worth calling a standout.
We get a reprieve on Wednesday the 16th morning – 0.8m from the WSW at 12 seconds with glassy conditions. That’s a lovely session if you’re after small, clean waves for a longboard. The water temp is around average for this time of year, nothing unusual.
Saturday the 19th and Sunday the 20th bring more of the same – small, messy afternoons. But look at Sunday the 20th morning: 1.2m from the SW, 10 second period, and glassy winds again. That’s another clean, small morning. Not a standout, but a solid session.
Then we get a real late-show surprise. Saturday the 26th morning: 1.7m from the WSW, 8 second period, with a light cross-off from the SSE, clean conditions. The combined energy is solid at 888 – that’s strong. This is the second true standout of the run. It’s a bit far out, so treat it as promising but not locked in. If the wind holds, that’s going to be a ripping morning at Matanzas.
Between Sunday the 13th and Saturday the 26th, there are patches of 3-4 days where the afternoons are write-offs, but the mornings keep giving little windows. The longest gap without any real recommendation is from Monday the 14th through Wednesday the 16th – only the Wednesday morning is worth looking at.
Overall, Matanzas is fairly consistent, so despite the choppy afternoons, it never really goes flat. Stoke is high for those two morning windows: Sunday the 13th and Saturday the 26th.
Keep an eye on that later date. Rusty out.
Short Range ForecastMostly dry. Very mild (max 15°C on Sat afternoon, min 8°C on Fri night). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Very mild (max 18°C on Tue afternoon, min 11°C on Sun night). Wind will be generally light. | ||||||||||||||||||
Friday 11 | Saturday 12 | Sunday 13 | Monday 14 | Tuesday 15 | Wednesday 16 | ||||||||||||||
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) | WSW 12 | WSW 12 | WSW 12 | WSW 9 | SW 8 | SW 8 | SW 9 | WSW 18 | WSW 17 | WSW 16 | WSW 14 | WSW 14 | WSW 13 | WSW 13 | WSW 12 | WSW 12 | WSW 12 | SW 12 | WSW 11 |
Wave Graph | |||||||||||||||||||
309 | 294 | 231 | 617 | 419 | 286 | 269 | 286 | 428 | 715 | 789 | 704 | 534 | 476 | 324 | 265 | 180 | 142 | 103 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-off | cross-on | cross | cross-off | cross-on | cross-off | cross-off | cross-on | cross | cross | cross-on | cross-off | cross | cross-on | cross | glassy | cross-on | cross |
High Tide | 11:09PM1.19m | 11:19AM1.49m | 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 | ||||||
Low Tide | 5:00AM0.05m | 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 | |||||||
— | 7:52 | — | — | 7:50 | — | — | 7:50 | — | — | 7:48 | — | — | 7:47 | — | — | 7:46 | — | — | |
7:35 | — | 7:36 | — | — | 7:36 | — | — | 7:37 | — | — | 7:37 | — | — | 7:37 | — | — | 7:38 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 11 | 13 | 14 | 11 | 12 | 15 | 13 | 15 | 15 | 13 | 16 | 17 | 14 | 17 | 18 | 14 | 14 | 15 | 12 |
Feels °C | 8 | 9 | 8 | 6 | 9 | 11 | 9 | 13 | 12 | 11 | 14 | 14 | 11 | 14 | 15 | 12 | 13 | 13 | 9 |
Swell 1 Height (m) Direction Period (s) | WSW 12 | WSW 12 | W 10 | WSW 9 | SW 8 | SW 10 | SW 9 | SW 8 | SW 9 | SW 8 | WSW 14 | WSW 14 | WSW 13 | WSW 13 | WSW 12 | WSW 12 | SW 6 | SW 6 | SW 6 |
309 | 294 | 171 | 617 | 419 | 89 | 269 | 286 | 269 | 201 | 789 | 704 | 534 | 476 | 324 | 265 | 56 | 45 | 47 | |
Swell 2 Height (m) Direction Period (s) | NW 13 | SW 5 | WSW 12 | SW 18 | WSW 16 | WSW 21 | SW 10 | WSW 18 | WSW 17 | WSW 16 | SW 8 | SW 8 | SW 8 | SW 8 | NW 13 | SW 7 | WSW 12 | SW 12 | WSW 11 |
7 | 8 | 231 | 13 | 27 | 44 | 106 | 280 | 428 | 715 | 169 | 142 | 120 | 108 | 6 | 73 | 180 | 142 | 103 | |
Swell 3 Height (m) Direction Period (s) | NW 11 | NW 11 | NW 12 | NW 12 | NW 13 | WSW 16 | WSW 20 | W 16 | W 15 | W 13 | NW 12 | NW 12 | NW 11 | NW 12 | — | NW 12 | W 10 | W 9 | W 15 |
5 | 5 | 5 | 6 | 6 | 26 | 149 | 46 | 67 | 87 | 5 | 5 | 5 | 5 | — | 6 | 8 | 15 | 38 | |
Wind waves Height (m) Direction Period (s) | SW 4 | — | SW 4 | — | — | SW 8 | — | — | — | — | — | — | — | — | SW 7 | — | — | — | — |
12 | — | 24 | — | — | 286 | — | — | — | — | — | — | — | — | 100 | — | — | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 43 | 0 | 291 | 48 | 0 | 229 | 0 | 0 | 291 | 16 | 5 | 60 | 0 | 5 | 60 | 16 | 0 | 248 | 43 |
Best forecast wave conditions in Santiago | |||||||||||||||||||
Best forecast wave conditions in Chile | |||||||||||||||||||
Header Global | |||||||||||||||||||
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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.










