
Surf Forecasts:
Matanzas surf forecast from 8 Sep 2026:
- Best quality surf: Tuesday 8 Sep, 9AM (local time) - 4.5ft (1.3m), 13s period, SW swell with cross-offshore winds.
- Most powerful swell: Monday 14 Sep, 12AM (local time) - 4ft (1.2m), 16s period, WSW swell with 671 kJ wave energy.
- Next surfable swell (1★+): Tuesday 8 Sep, 9AM (local time) - 4.5ft (1.3m), 13s 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 Tuesday (Sep 08) at 9AM. The primary swell is predicted to be 1.3m and 13s period with a secondary swell of 0.3m and 18s. 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+) | 9AM (Tue 8th Sep) | 4.5ft (1.3m) 13s |
| Best Surf | 9AM (Tue 8th Sep) | 4.5ft (1.3m) 13s |
| 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 folks, Rusty here. Let’s talk about what’s cooking at Matanzas. This is a consistent reef break that’s exposed to the SW, and it’s got a good run of surf coming our way.
The overall pattern is pretty solid. We’ve got a solid stretch of SW groundswell pushing through, with long periods that’ll be stacking up beautifully on the reef. The water temp is sitting at 55°, which is bang on average for this time of year – no surprises there.
Kicking off Tuesday morning, the 8th of September, we’ve got clean 4ft SW swell with a 13-second period. The wind is light and cross-off from the SSE, which is a real treat. The energy is moderate (615), and the wave comment says it all – expect very good surf conditions. The afternoons get a bit dicey with onshore wind, so make the morning session your priority.
Moving into Wednesday the 9th, the swell drops to 2ft, but the period stretches to 15 seconds. The morning is clean again with a slight air, making for some fun, long lines on the reef. The energy is still moderate (400). Thursday the 10th and Friday the 11th are a mixed bag – mornings offer clean 3ft to 4ft surf, but the afternoons get blown out by a stiff cross-onshore wind.
Saturday the 12th brings a bit more size, with 6ft in the morning. The period drops to 9 seconds, so it’s a bit more of a short-period swell, but it’s clean and the energy is moderate (463). Still a good session.
Now, if you’ve got patience, the real standout window starts Sunday the 13th of September. The morning is absolutely glassy with a 2ft swell but a massive 18-second period. The energy is moderate (528), and the wave comment says it all – expect very good surf conditions. This is a long-period groundswell, which will be peeling like a dream on this reef. The following Monday the 14th and Tuesday the 15th mornings are also looking fantastic, with 4ft and 4ft SW swell, long periods, and clean cross-off winds. The energy jumps up to 786 on Monday, so the power is there.
The second week stays promising. Thursday the 17th and Saturday the 19th of September mornings are clean. Saturday the 19th is a big one – 5ft of SW swell with a 12-second period, light offshore wind from the ENE, and a very strong energy reading (723). The wave comment is expecting very good surf conditions. This is a top pick.
Then, the real heavy hitter arrives on Wednesday the 23rd of September. We’re looking at 8ft of SW swell with a 13-second period. The energy is massive (2548), making it an excellent session for experienced surfers only. The morning wind is gentle and cross-off, keeping it clean. This is not for beginners – it’s a proper, powerful reef wave.
Overall, the best surf on offer is the morning of Monday the 14th of September for the quality of the swell and conditions, and the morning of Saturday the 19th of September for the size and clean conditions. The 23rd is for the experts only.
This is Rusty, signing off.
Short Range ForecastMostly dry. Very mild (max 14°C on Thu afternoon, min 8°C on Tue morning). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Very mild (max 14°C on Sun afternoon, min 9°C on Sat morning). Wind will be generally light. | ||||||||||||||||||||
Tuesday 8 | Wednesday 9 | Thursday 10 | Friday 11 | Saturday 12 | Sunday 13 | Monday 14 | |||||||||||||||
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 13 | SW 13 | SW 12 | WSW 15 | WSW 14 | WSW 13 | WSW 13 | WSW 13 | WSW 12 | SW 12 | SW 12 | SW 11 | WSW 9 | SW 8 | SW 9 | WSW 18 | WSW 17 | WSW 16 | WSW 14 | WSW 14 | WSW 13 |
Wave Graph | |||||||||||||||||||||
552 | 418 | 292 | 188 | 413 | 351 | 357 | 362 | 309 | 325 | 343 | 341 | 430 | 232 | 314 | 276 | 344 | 671 | 660 | 606 | 491 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | on | cross-off | cross-off | cross-on | cross | cross | cross-on | cross | cross-off | cross-on | cross-on | cross-off | cross-on | glassy | cross-off | cross-on | cross | cross-off | cross-on | cross |
High Tide | 9:07AM1.43m | 9:51PM0.98m | 9:55AM1.50m | 10:32PM1.09m | 10:39AM1.52m | 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 | |||||||
Low Tide | 3:54PM0.07m | 3:26AM0.18m | 4:33PM0.00m | 4:14AM0.10m | 5:08PM-0.03m | 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 | ||||||||
7:56 | — | — | 7:54 | — | — | 7:54 | — | — | 7:52 | — | — | 7:50 | — | — | 7:50 | — | — | 7:48 | — | — | |
— | 7:34 | — | — | 7:34 | — | — | 7:35 | — | — | 7:36 | — | — | 7:36 | — | — | 7:37 | — | — | 7:37 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 11 | 12 | 10 | 12 | 13 | 11 | 13 | 14 | 11 | 13 | 13 | 11 | 11 | 12 | 11 | 12 | 14 | 12 | 15 | 16 | 16 |
Feels °C | 9 | 9 | 8 | 10 | 10 | 8 | 11 | 9 | 6 | 9 | 8 | 6 | 10 | 10 | 10 | 11 | 11 | 8 | 12 | 11 | 14 |
Swell 1 Height (m) Direction Period (s) | SW 13 | SW 13 | SW 12 | WSW 12 | WSW 14 | WSW 13 | WSW 13 | WSW 13 | WSW 12 | SW 12 | SW 12 | SW 11 | WSW 9 | SW 10 | SW 9 | SW 9 | WSW 17 | WSW 16 | WSW 14 | WSW 14 | WSW 13 |
552 | 418 | 292 | 187 | 413 | 351 | 357 | 362 | 309 | 325 | 343 | 341 | 430 | 106 | 314 | 235 | 344 | 671 | 660 | 606 | 491 | |
Swell 2 Height (m) Direction Period (s) | WSW 18 | WSW 18 | WSW 16 | SW 6 | SW 6 | SW 5 | SW 5 | NW 12 | NW 13 | SW 5 | NW 12 | W 10 | WSW 16 | WSW 21 | WSW 20 | WSW 18 | W 15 | SW 8 | SW 7 | NW 12 | SW 7 |
63 | 103 | 147 | 25 | 33 | 29 | 19 | 6 | 7 | 14 | 6 | 28 | 27 | 44 | 149 | 276 | 41 | 156 | 121 | 5 | 147 | |
Swell 3 Height (m) Direction Period (s) | — | — | SW 5 | WSW 15 | NW 13 | NW 12 | NW 12 | — | NW 11 | NW 11 | SW 20 | NW 12 | NW 13 | WSW 16 | SW 15 | WSW 13 | SW 13 | SW 12 | NW 12 | — | NW 11 |
— | — | 10 | 188 | 7 | 6 | 6 | — | 5 | 5 | 15 | 6 | 6 | 26 | 56 | 17 | 28 | 40 | 5 | — | 5 | |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | SW 4 | SW 5 | — | — | — | — | SW 8 | — | — | SW 9 | — | — | SW 8 | — |
— | — | — | — | — | — | — | 17 | 21 | — | — | — | — | 232 | — | — | 197 | — | — | 143 | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 364 | 0 | 0 | 364 | 43 | 5 | 364 | 53 | 0 | 250 | 48 | 0 | 229 | 0 | 0 | 364 | 43 | 0 | 291 | 16 |
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.










