
Surf Forecasts:
Matanzas surf forecast from 16 Sep 2026:
- Best quality surf: Tuesday 22 Sep, 3AM (local time) - 6.5ft (2.0m), 12s period, SW swell with cross-offshore winds.
- Most powerful swell: Monday 21 Sep, 12PM (local time) - 10ft (3.0m), 13s period, WSW swell with 2,721 kJ wave energy.
- Next surfable swell (1★+): Thursday 17 Sep, 9AM (local time) - 3.5ft (1.0m), 6s 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 Thursday (Sep 17) at 9AM. The primary swell is predicted to be 1.0m and 6s 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 3.0m 13s and forecast to arrive on Monday (Sep 21) at 12PM. 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 (Thu 17th Sep) | 3.5ft (1.0m) 6s |
| Best Surf | 3AM (Tue 22nd Sep) | 6.5ft (2.0m) 12s |
| Most Powerful | 12PM (Mon 21st Sep) | 10ft (3.0m) 13s |
Table - best surf conditions forecast for Matanzas over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s have a look at what’s coming down the pipe for Matanzas over the next couple of weeks. Right now, the water is at about 56°F – which is pretty normal for this time of year, no big anomaly there.
It’s going to be a slow start, I won’t lie to you. Through Wednesday the 16th and on into Thursday and Friday, the waves are small and messy, with a lot of cross-shore and onshore wind messing things up. You’re looking at knee-high slop, weak energy (163 to 224), and just not worth paddling out for. There's a little window Thursday morning with some cleaner conditions and a 4ft SW swell, but it’s short period stuff at 7 seconds, so it’ll be weak and crumbling. Not inspiring.
We get a bit of a lift on Saturday the 19th. The morning shows a clean 4ft swell from the WSW, cross-off light breeze, and moderate energy (297). It’s surfable, but still not a standout. Sunday afternoon the 20th cleans up again with a 4ft WSW swell and light offshore winds – that’s a decent little session, but nothing to write home about.
The real spike hits on Monday the 21st. That morning we’ve got a 7ft SW groundswell rolling in with a 12-second period and very strong energy (1518). Problem is, the wind goes cross-shore and then turns into a fresh cross-onshore by the afternoon. That’s a lot of power for intermediate surfers – it’s going to be lumpy and challenging. Not the cleanest day, but if you’re an experienced local, you’ll find some big walls early.
But the standout, without a doubt, is Saturday the 26th of September. That morning is glassy calm with a 5ft SW swell, 11-second period, and strong energy (1094). The conditions are absolutely clean, no wind at all. This is the pick of the fortnight – solid chest-to-head high waves, clean faces, and that reef at Matanzas should be lining up nicely. For experts, this is prime. Beginners should sit this one out – over 5ft and a bit punchy.
After that, we taper off. Sunday the 27th morning has clean 3ft surf, and Monday the 28th morning a similar 5ft with offshore winds. The last week brings smaller, wind-affected waves, and nothing really worth chasing. There’s a long lull from the 29th through to the 1st of October – knee-high dribble with onshore chop.
So in short: go Saturday the 26th, dawn patrol. It’s the best we’ve got. The big Monday the 21st swell is worth a look for experts if you can handle the afternoon chop.
Rusty.
Short Range ForecastMostly dry. Very mild (max 17°C on Wed afternoon, min 12°C on Thu night). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Very mild (max 16°C on Sat morning, min 11°C on Sun night). Wind will be generally light. | ||||||||||||||||||||
Wednesday 16 | Thursday 17 | Friday 18 | Saturday 19 | Sunday 20 | Monday 21 | Tuesday 22 | |||||||||||||||
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) | WSW 12 | SW 12 | SW 6 | SW 6 | WSW 13 | WSW 12 | WSW 11 | WSW 11 | WSW 10 | WSW 10 | WSW 10 | WSW 12 | WSW 11 | WSW 11 | WSW 10 | WSW 11 | WSW 13 | SW 12 | SW 11 | SW 10 | WSW 10 |
Wave Graph | |||||||||||||||||||||
94 | 142 | 126 | 83 | 289 | 199 | 346 | 206 | 206 | 190 | 288 | 669 | 281 | 593 | 712 | 1183 | 2646 | 1358 | 524 | 308 | 169 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-on | cross | cross-off | cross-on | cross | cross | cross-on | glassy | cross-off | cross-on | cross | cross | cross | cross | cross | cross-on | cross | cross | cross-on | cross-on |
High Tide | 2:27PM0.90m | 2:51AM1.18m | 3:15PM0.78m | 3:46AM1.11m | 4:31PM0.69m | 5:04AM1.05m | 6:42PM0.67m | 6:37AM1.06m | 8:13PM0.72m | 7:49AM1.11m | 8:56PM0.79m | 8:38AM1.18m | 9:27PM0.87m | ||||||||
Low Tide | 8:10PM0.35m | 9:43AM0.40m | 8:45PM0.44m | 11:10AM0.46m | 9:39PM0.52m | 12:58PM0.45m | 11:25PM0.56m | 2:11PM0.39m | 1:05AM0.53m | 2:56PM0.31m | 2:07AM0.45m | 3:28PM0.24m | 2:52AM0.37m | ||||||||
7:46 | — | — | 7:43 | — | — | 7:43 | — | — | 7:41 | — | — | 7:39 | — | — | 7:39 | — | — | 7:37 | — | — | |
— | 7:38 | — | — | 7:39 | — | — | 7:39 | — | — | 7:40 | — | — | 7:42 | — | — | 7:43 | — | — | 7:43 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 16 | 17 | 15 | 17 | 16 | 12 | 16 | 17 | 17 | 16 | 16 | 13 | 14 | 15 | 13 | 14 | 15 | 13 | 15 | 18 | 15 |
Feels °C | 13 | 13 | 11 | 15 | 14 | 12 | 15 | 15 | 16 | 14 | 14 | 11 | 12 | 13 | 11 | 9 | 10 | 9 | 11 | 14 | 11 |
Swell 1 Height (m) Direction Period (s) | SW 6 | SW 12 | WSW 11 | SW 6 | WSW 13 | WSW 8 | WSW 11 | WSW 11 | WSW 10 | WSW 10 | WSW 10 | WSW 12 | WSW 11 | WSW 11 | WSW 10 | WSW 11 | WSW 13 | SW 12 | SW 11 | W 10 | WSW 10 |
30 | 142 | 78 | 83 | 289 | 109 | 346 | 206 | 206 | 190 | 288 | 669 | 281 | 593 | 712 | 1183 | 2646 | 1358 | 524 | 194 | 169 | |
Swell 2 Height (m) Direction Period (s) | WSW 12 | W 10 | W 15 | WSW 11 | SW 10 | WSW 12 | WSW 18 | WSW 18 | SW 6 | SW 5 | WSW 14 | NW 13 | NW 13 | NW 13 | — | SW 14 | — | W 11 | W 10 | — | SW 10 |
94 | 16 | 17 | 65 | 4 | 199 | 34 | 31 | 28 | 14 | 161 | 7 | 7 | 7 | — | 877 | — | 272 | 249 | — | 96 | |
Swell 3 Height (m) Direction Period (s) | WSW 10 | NW 12 | NW 12 | WSW 13 | SW 21 | WSW 20 | — | — | WSW 17 | SW 13 | NW 12 | — | W 18 | — | — | — | — | — | NW 12 | — | W 16 |
38 | 6 | 6 | 60 | 18 | 38 | — | — | 27 | 40 | 6 | — | 6 | — | — | — | — | — | 6 | — | 5 | |
Wind waves Height (m) Direction Period (s) | — | SW 6 | SW 6 | — | SW 6 | — | — | SW 6 | — | — | — | — | N 4 | — | — | — | — | — | — | SW 10 | — |
— | 60 | 126 | — | 59 | — | — | 43 | — | — | — | — | 7 | — | — | — | — | — | — | 308 | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 48 | 364 | 48 | 0 | 118 | 0 | 16 | 60 | 0 | 0 | 55 | 79 | 43 | 0 | 16 | 43 | 364 | 16 | 16 | 48 | 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.










