Surf Forecasts:
Matanzas surf forecast from 21 Aug 2026:
- Best quality surf: Thursday 27 Aug, 8PM (local time) - 11ft (3.5m), 16s period, WSW swell with glassy winds.
- Most powerful swell: Thursday 27 Aug, 8PM (local time) - 11ft (3.5m), 16s period, WSW swell with 5,527 kJ wave energy.
- Next surfable swell (1★+): Friday 21 Aug, 11PM (local time) - 5ft (1.6m), 10s 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 (Aug 21) at 11PM. The primary swell is predicted to be 1.6m and 10s period with a secondary swell of 0.3m and 13s. 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 3.5m 16s and forecast to arrive on Thursday (Aug 27) at 8PM. Winds are predicted to be glassy at the time the swell arrives.
| Wave Type | Time (-04) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 11PM (Fri 21st Aug) | 5ft (1.6m) 10s |
| Best Surf | 8PM (Thu 27th Aug) | 11ft (3.5m) 16s |
| Most Powerful | 8PM (Thu 27th Aug) | 11ft (3.5m) 16s |
Table - best surf conditions forecast for Matanzas over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let's take a long, hard look at what's coming down the pike at Matanzas.
Overall, we're looking at a slow start, but there’s a serious spike of big, powerful swell due around the end of next week. The early part of the window is pretty grim, but if you’ve got the experience, the run from the 26th of August through the 29th looks like it could be something special. The water temp is sitting around 56°F, which is pretty much what you’d expect for this time of year—nothing out of the ordinary there.
Right now, Friday the 21st is a write-off. We've got a 6ft swell from the WSW, but the wind is blowing straight across from the south at 12-16 mph, making it messy. The wave energy is sitting at a moderate 700. It’s not worth getting wet.
Saturday the 22nd through to Monday the 24th is a dead zone. Swell is dropping and the wind stays cross or onshore. Wave energy drops from 441 all the way down to 184. Just forget it and do something else.
Now, Tuesday the 25th shows a glimmer. It’s not big, only 2ft, but the swell period jumps to a very long 15 seconds, a proper groundswell. With a light cross-offshore breeze from the NNE, it cleans up nicely. It won’t be packing much punch, with energy at 274, but it’s a promise of things to come.
Here’s the good stuff. Wednesday the 26th of August is where it kicks off. The swell jumps to 6ft from the WSW, with a 12-second period, pushing wave energy up to a strong 1000. The morning has a light east wind blowing straight offshore. That is *excellent* news for Matanzas. The afternoon stays clean, too, with a light breeze. This is for experienced surfers.
Thursday the 27th of August is the standout. This is the one to circle on the calendar. We’ve got a solid 7ft to 8ft swell from the WSW. The period lengthens to 13 seconds. The combined wave energy skyrockets to a very strong 3563 by the afternoon. And the wind? It's dead calm, glassy from the WNW. That means perfect, clean, peeling faces. This is a serious swell for experts only, with that 8ft size and long period, but the conditions couldn't be better for it.
Friday the 28th of August keeps the energy pumping. The swell peaks at 10ft with a 15-second period. The wave energy is massive at 4140. Morning has a clean cross-offshore breeze, but the afternoon gets a bit of a cross-shore wind that might mess with the face. Still, a 10ft, long-period groundswell at Matanzas is a rare treat.
Saturday the 29th still has plenty of push with a 7ft swell and glassy conditions in the morning, but the energy is starting to wind down. After that, from the 30th of August, things get messy again with onshore winds and dropping swell.
Looking way out to the end of the window, Wednesday the 2nd of September has a little blip of hope. A 4ft swell from the SW with glassy, calm winds in the morning. The period jumps to a very long 17 seconds that afternoon, but it's only 2ft. That’s a bit of a tease—long period but no real height to work with.
So there you have it. A long quiet spell, then a few days of absolute quality for the big dogs. Don't sleep on the 27th.
Rusty.
Short Range ForecastMostly dry. Very mild (max 18°C on Fri afternoon, min 11°C on Fri morning). Wind will be generally light. | Days 4-6 Weather SummaryLight rain (total 9mm), mostly falling on Wed morning. Very mild (max 16°C on Mon night, min 11°C on Wed night). Wind will be generally light. | ||||||||||||||||||||
Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | Wednesday 26 | Thursday 27 | |||||||||||||||
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 11 | WSW 11 | WSW 10 | WSW 11 | WSW 10 | SW 7 | SW 7 | SW 7 | SW 13 | WSW 12 | WSW 12 | WSW 10 | WSW 15 | WSW 14 | WSW 13 | WSW 12 | WSW 12 | WSW 13 | WSW 12 | WSW 13 | WSW 16 |
Wave Graph | |||||||||||||||||||||
686 | 687 | 510 | 425 | 134 | 136 | 86 | 57 | 61 | 86 | 150 | 123 | 167 | 213 | 547 | 1000 | 921 | 1295 | 1450 | 1990 | 5326 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross-off | cross | cross | glassy | cross | cross | cross-on | on | cross-on | on | cross-off | cross | cross-off | off | cross-off | cross-off | glassy | glassy | cross-off |
High Tide | 5:55PM0.69m | 6:19AM1.09m | 7:30PM0.72m | 7:25AM1.15m | 8:21PM0.77m | 8:14AM1.23m | 8:57PM0.83m | 8:52AM1.31m | 9:27PM0.89m | 9:26AM1.37m | 9:56PM0.96m | 9:58AM1.41m | 10:25PM1.03m | ||||||||
Low Tide | 12:27PM0.47m | 11:09PM0.51m | 1:42PM0.40m | 00:32AM0.49m | 2:31PM0.33m | 1:31AM0.43m | 3:07PM0.25m | 2:17AM0.35m | 3:37PM0.19m | 2:55AM0.27m | 4:05PM0.13m | 3:31AM0.21m | 4:32PM0.09m | 4:05AM0.17m | |||||||
7:18 | — | — | 7:18 | — | — | 7:16 | — | — | 7:15 | — | — | 7:13 | — | — | 7:13 | — | — | 7:11 | — | — | |
— | 6:22 | — | — | 6:22 | — | — | 6:22 | — | — | 6:23 | — | — | 6:23 | — | — | 6:24 | — | — | 6:25 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | 8 | — | — | — | — | — |
Temp °C | 15 | 18 | 16 | 16 | 17 | 16 | 13 | 14 | 13 | 14 | 15 | 16 | 14 | 14 | 14 | 12 | 16 | 14 | 14 | 14 | 12 |
Feels °C | 11 | 14 | 13 | 12 | 13 | 13 | 11 | 13 | 13 | 13 | 14 | 15 | 12 | 12 | 12 | 10 | 15 | 12 | 13 | 12 | 11 |
Swell 1 Height (m) Direction Period (s) | WSW 11 | WSW 11 | WSW 10 | WSW 11 | WSW 10 | SW 7 | SW 7 | SW 7 | SW 6 | WSW 12 | WSW 12 | WSW 10 | WSW 10 | WSW 14 | WSW 13 | WSW 12 | WSW 12 | WSW 13 | WSW 12 | WSW 13 | WSW 16 |
686 | 687 | 510 | 425 | 133 | 136 | 86 | 57 | 24 | 86 | 150 | 123 | 85 | 213 | 547 | 1000 | 921 | 1295 | 1450 | 1990 | 5326 | |
Swell 2 Height (m) Direction Period (s) | SW 19 | SW 18 | — | SW 12 | SW 12 | W 10 | W 9 | W 9 | W 10 | SW 12 | SSW 12 | SW 12 | WSW 15 | WSW 9 | — | — | WSW 15 | W 22 | W 19 | W 17 | — |
14 | 13 | — | 6 | 34 | 67 | 41 | 40 | 48 | 73 | 52 | 89 | 167 | 73 | — | — | 142 | 9 | 369 | 1573 | — | |
Swell 3 Height (m) Direction Period (s) | — | — | — | SW 16 | W 16 | SSW 12 | SW 11 | WSW 11 | SW 13 | W 9 | SW 16 | SW 5 | SSW 10 | SW 11 | — | — | W 20 | — | — | — | — |
— | — | — | 10 | 5 | 53 | 30 | 40 | 61 | 25 | 65 | 4 | 22 | 33 | — | — | 8 | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | — | — | — | — | SW 7 | — | — | — | — | — | SW 5 | — | — | — | — | — | — | — | — | — | — |
— | — | — | — | 134 | — | — | — | — | — | 7 | — | — | — | — | — | — | — | — | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 43 | 120 | 0 | 48 | 48 | 0 | 22 | 53 | 48 | 118 | 43 | 5 | 0 | 55 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
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.











