
Surf Forecasts:
Matanzas surf forecast from 12 Aug 2026:
- Best quality surf: Friday 14 Aug, 11PM (local time) - 6ft (1.9m), 11s period, WNW swell with cross-offshore winds.
- Most powerful swell: Wednesday 19 Aug, 2AM (local time) - 6ft (1.9m), 14s period, WSW swell with 1,362 kJ wave energy.
- Next surfable swell (1★+): Wednesday 12 Aug, 8PM (local time) - 3ft (0.9m), 17s 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 Wednesday (Aug 12) at 8PM. The primary swell is predicted to be 0.9m and 17s period with a secondary swell of 0.6m and 6s. 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 1.9m 14s and forecast to arrive on Wednesday (Aug 19) at 2AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.7m 4s period and expected on Friday (Aug 14) at 2PM.
| Wave Type | Time (-04) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 8PM (Wed 12th Aug) | 3ft (0.9m) 17s |
| Best Surf | 11PM (Fri 14th Aug) | 6ft (1.9m) 11s |
| Most Powerful | 2AM (Wed 19th Aug) | 6ft (1.9m) 14s |
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 Matanzas has in store for us over the next couple of weeks.
We’re starting off a bit slow, but hang tight because there’s some real magic brewing. The first few days are pretty average, with smaller swell and a fair bit of cross or onshore wind making things a little messy. The water temp is sitting about average for the time of year, nothing wild there.
Wednesday the 12th is a write-off, really. Tiny 2ft to 3ft WSW swell, and the wind is coming from the south and south-southwest, making it cross-shore and choppy. Not worth paddling out for.
Thursday the 13th morning is where we get our first real glimmer. The wind goes glassy from the WNW, and the swell bumps up to 4ft from the WSW with a super long period of 16 seconds. That’s a beautiful groundswell, and the energy reading is a solid 671 – moderate, but with those clean conditions, it’ll be a treat. The afternoon turns to rain and cross-shore wind, so make the most of that morning.
Friday the 14th is a good day. The morning is clean with a cross-offshore breeze from the NNE and 4ft of WNW swell. The afternoon builds to 6ft, still clean, with that same favourable wind. That’s a nice, fun size for intermediates, and the energy is climbing to 743. This is a solid pick for the week.
Saturday the 15th is a mixed bag. Morning has onshore wind and rain, so skip it. But the afternoon the wind goes offshore from the ENE, cleaning up 5ft of WNW swell. That’s a window of clean waves.
Sunday the 16th morning is clean with a light cross-offshore breeze and a smaller 3ft WSW swell, but the period is a nice 13 seconds. The afternoon gets messy with strong cross-onshore wind.
Monday the 17th and Tuesday the 18th are mostly average with cross-shore winds and energy readings around 500-600, but Tuesday morning the 18th deserves a shout-out. The swell is 5ft from the SW, period of 12 seconds, and the wind is cross-offshore from the NNE. The energy jumps to a strong 1001, which is serious. This is a good window for experienced surfers as that size is pushing into the bigger range.
Now, the standout – Wednesday the 19th morning. This is the one to circle. Glassy conditions, wind from the north at just 3 mph, and a solid 7ft swell from the WSW with a period of 15 seconds. The energy is a massive 1712 – that’s very strong. This is a powerful, clean groundswell. Because the period is long, it’ll be best at the reef setup here, but with that wind, it’s going to be world-class for the experienced crew. 7ft is getting into expert-only territory, so leave the foam boards at home.
The rest of that week gets windier and choppier, with strong cross-shore winds from the SSW, but we have another promising window on Saturday the 22nd morning with 7ft of SW swell, though the wind is cross-shore, so it won’t be as clean.
The final standout is early on Sunday the 23rd morning. Glassy again, with a light north wind, and 5ft of SW swell with a 13-second period. The energy is a moderate 632, but with those clean conditions, it’ll be a fun, glassy session.
After that, it fades out. The last week of the forecast has smaller, weaker swell and mostly onshore or cross-shore winds, with the energy dropping below 400. Not much to get excited about.
So, to wrap it up: the best on offer is hands-down Thursday the 13th morning for a glassy start, and the absolute peak is Wednesday the 19th morning for the big, clean groundswell. If you’re an experienced surfer, don’t miss that.
Rusty.
Short Range ForecastLight rain (total 2mm), mostly falling on Fri night. Very mild (max 15°C on Thu afternoon, min 7°C on Wed morning). Wind will be generally light. | Days 4-6 Weather SummaryModerate rain (total 17mm), heaviest on Sat morning. Very mild (max 15°C on Sun afternoon, min 9°C on Mon morning). Wind will be generally light. | ||||||||||||||||||||
Wednesday 12 | Thursday 13 | Friday 14 | Saturday 15 | Sunday 16 | Monday 17 | Tuesday 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) | WSW 19 | WSW 18 | WSW 16 | WSW 16 | WSW 15 | WSW 14 | WNW 11 | WNW 10 | WNW 12 | WNW 10 | WNW 9 | WSW 14 | WSW 13 | WSW 13 | WSW 14 | WSW 13 | WSW 13 | WSW 12 | WSW 16 | WSW 15 | WSW 14 |
Wave Graph | |||||||||||||||||||||
203 | 438 | 590 | 654 | 485 | 389 | 249 | 485 | 1150 | 551 | 271 | 419 | 362 | 330 | 357 | 342 | 326 | 304 | 506 | 752 | 1362 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross-off | glassy | cross-on | cross-off | cross-off | cross-off | cross-off | cross | cross | off | cross | cross | cross-off | cross-off | cross | cross | cross-off | cross | cross-off |
High Tide | 9:56AM1.62m | 10:31PM1.06m | 10:40AM1.63m | 11:12PM1.13m | 11:22AM1.57m | 11:53PM1.18m | 12:03PM1.46m | 00:33AM1.20m | 12:42PM1.32m | 1:14AM1.20m | 1:21PM1.16m | 1:56AM1.18m | 2:03PM1.00m | 2:43AM1.14m | |||||||
Low Tide | 4:38PM-0.05m | 4:09AM0.06m | 5:16PM-0.06m | 4:56AM0.04m | 5:53PM-0.04m | 5:42AM0.07m | 6:27PM0.01m | 6:29AM0.14m | 7:01PM0.10m | 7:18AM0.23m | 7:34PM0.19m | 8:11AM0.33m | 8:09PM0.30m | ||||||||
7:28 | — | — | 7:28 | — | — | 7:26 | — | — | 7:26 | — | — | 7:24 | — | — | 7:24 | — | — | 7:22 | — | — | |
— | 6:15 | — | — | 6:15 | — | — | 6:16 | — | — | 6:16 | — | — | 6:17 | — | — | 6:19 | — | — | 6:20 | — | |
mm | — | — | — | — | — | — | — | — | 2 | 6 | 8 | 3 | — | — | — | — | — | — | — | — | — |
Temp °C | 10 | 13 | 12 | 14 | 15 | 13 | 13 | 14 | 14 | 13 | 14 | 13 | 14 | 15 | 12 | 12 | 15 | 13 | 14 | 14 | 12 |
Feels °C | 6 | 9 | 8 | 13 | 12 | 11 | 10 | 11 | 13 | 11 | 11 | 13 | 12 | 11 | 7 | 9 | 11 | 10 | 12 | 11 | 10 |
Swell 1 Height (m) Direction Period (s) | WSW 19 | WSW 18 | WSW 16 | WSW 16 | WSW 15 | WSW 14 | WNW 11 | WNW 10 | WNW 12 | WNW 10 | WNW 9 | WSW 14 | WSW 13 | WSW 13 | SW 7 | SW 8 | WSW 13 | SW 8 | SW 11 | WSW 15 | WSW 14 |
203 | 438 | 590 | 654 | 485 | 389 | 249 | 485 | 1150 | 551 | 271 | 419 | 362 | 330 | 200 | 266 | 326 | 169 | 471 | 752 | 1362 | |
Swell 2 Height (m) Direction Period (s) | SW 10 | WSW 13 | SW 6 | SW 6 | W 6 | WNW 6 | WSW 13 | WSW 13 | WSW 13 | WSW 13 | WSW 16 | WNW 8 | SW 7 | W 8 | WSW 14 | WSW 13 | SW 20 | WSW 12 | WSW 16 | SW 11 | — |
64 | 57 | 18 | 16 | 10 | 12 | 201 | 198 | 183 | 147 | 220 | 101 | 49 | 29 | 357 | 342 | 15 | 304 | 506 | 347 | — | |
Swell 3 Height (m) Direction Period (s) | WSW 14 | — | SW 9 | — | SSW 8 | NW 13 | SW 6 | NW 12 | — | WSW 16 | WSW 10 | WSW 8 | WNW 8 | W 8 | NW 10 | NW 10 | NW 10 | WSW 18 | — | — | — |
104 | — | 21 | — | 7 | 7 | 1 | 6 | — | 153 | 74 | 70 | 37 | 1 | 4 | 4 | 4 | 209 | — | — | — | |
Wind waves Height (m) Direction Period (s) | SW 4 | SW 10 | — | — | — | ESE 8 | N 4 | — | — | — | — | — | — | SW 6 | — | — | SW 9 | — | — | — | — |
7 | 92 | — | — | — | 7 | 9 | — | — | — | — | — | — | 64 | — | — | 293 | — | — | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 5 | 60 | 0 | 0 | 435 | 0 | 43 | 5 | 0 | 43 | 43 | 0 | 16 | 291 | 43 | 0 | 229 | 53 | 0 | 55 | 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.











