
Surf Forecasts:
Matanzas surf forecast from 4 Sep 2026:
- Best quality surf: Sunday 6 Sep, 3AM (local time) - 4ft (1.2m), 16s period, SW swell with cross-offshore winds.
- Most powerful swell: Thursday 3 Sep, 11PM (local time) - 7ft (2.2m), 14s period, WSW swell with 1,748 kJ wave energy.
- Next surfable swell (1★+): Sunday 6 Sep, 3AM (local time) - 4ft (1.2m), 16s 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 Sunday (Sep 06) at 3AM. The primary swell is predicted to be 1.2m and 16s period with a secondary swell of 1.2m and 9s. 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 2.2m 14s and forecast to arrive on Thursday (Sep 03) at 11PM. 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+) | 3AM (Sun 6th Sep) | 4ft (1.2m) 16s |
| Best Surf | 3AM (Sun 6th Sep) | 4ft (1.2m) 16s |
| Most Powerful | 11PM (Thu 3rd Sep) | 7ft (2.2m) 14s |
Table - best surf conditions forecast for Matanzas over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s get into it.
Alright, lookin’ at the next 16 days for Matanzas, it’s a tough stretch. The swell is there, but the wind is mostly a mess. We’ve got a lot of cross-shore and cross-onshore breeze, and that’s gonna make things choppy and lumpy. We’re not looking at a classic run of clean, glassy waves, that’s for sure.
The water temp is sitting at 57°F which is about 2°F warmer than normal for this time of year, so it’s pleasant enough. The combined wave energy in the early days is up there, around 885 (moderate) on Thursday morning, but that’s paired with a 16 mph cross-wind. The swell is coming from the WSW at 4ft with a 14-second period, which is a nice groundswell, but the wind just ruins the shape. It’s a cross-chop mess. Thursday afternoon is even worse, with a fresh breeze and lumpy conditions.
Friday the 4th and Saturday the 5th are much the same story. The swell period jumps to 18 seconds on Saturday morning, which is a very long period groundswell. That’s the kind of energy that would be magic at a point break, but at a reef break like Matanzas, it might just power through and make things a bit straight. The wind is still cross-shore, so the waves will be there, but don’t expect perfection.
Sunday the 6th is a bit of a glimmer. We get a light NW wind in the morning at only 3 mph, almost glassy. The swell is 5ft from the SW with a 15-second period, and the combined energy is 960 (moderate). The wind is cross-onshore though, so there will be a slight ripple. This is the best the first week has to offer. It’s a surfable, clean-ish wave, but we’re dealing with a marginal forecast.
The rest of the first week and into the second week is a write-off. The wind stays onshore or cross-onshore, the swell drops or gets messy. There’s a pulse on the 11th of September with 6ft to 8ft swell from the WSW, but the wind is screaming at 19 mph, so it’s just a lumpy, blown-out mess. This is expert-only stuff, and even then, it’s not enjoyable.
From the 14th of September onwards, the wave energy drops off significantly. The combined energy readings are all below 500 (weak), and the swell is small and short-period. We’re looking at a long stretch of poor surf conditions. The 18th of September sees a slight uptick in size to 6ft, but it’s a short-period, onshore windswell of 8 seconds. That’s just messy, choppy water.
Honestly, the standout is a relative one. If you’re desperate, Sunday morning the 6th of September is your best bet. The wind is light, the swell has some decent energy, and you might get a few clean ones. It’s not a classic, but it’s the only window that isn’t a total write-off. The rest of the time, you’re fighting the wind. For a reef setup like Matanzas, the persistent cross-chop is a real killer.
Stay patient, and don’t force it. The forecast can change, but right now, it’s a waiting game.
Rusty
Short Range ForecastMostly dry. Very mild (max 15°C on Fri afternoon, min 7°C on Fri night). Winds decreasing (fresh winds from the SSW on Thu afternoon, calm by Sun morning). | Days 5-7 Weather SummaryMostly dry. Very mild (max 14°C on Sun afternoon, min 8°C on Sun night). Wind will be generally light. | |||||||||||||||||||
Thu 3 | Friday 4 | Saturday 5 | Sunday 6 | Monday 7 | Tuesday 8 | Wednesday 9 | ||||||||||||||
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 15 | WSW 13 | WSW 13 | WSW 13 | SW 8 | SW 18 | SW 18 | SW 16 | SW 15 | SW 14 | SW 14 | SW 14 | SW 14 | SW 13 | SW 13 | SW 12 | WSW 12 | WSW 14 | WSW 14 | WSW 13 |
Wave Graph | ||||||||||||||||||||
1275 | 1697 | 577 | 476 | 439 | 491 | 607 | 748 | 784 | 1079 | 776 | 799 | 787 | 560 | 431 | 358 | 260 | 425 | 384 | 290 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross | cross | cross | cross | cross-on | cross-off | glassy | on | cross-off | cross-on | cross-on | cross | cross | cross-on | cross | cross-on | cross-on | glassy |
High Tide | 2:18PM0.87m | 3:03AM1.21m | 3:36PM0.76m | 4:25AM1.20m | 5:28PM0.72m | 5:54AM1.25m | 7:04PM0.77m | 7:09AM1.34m | 8:05PM0.87m | 8:07AM1.43m | 8:51PM0.98m | 8:55AM1.50m | 9:32PM1.09m | |||||||
Low Tide | 8:06PM0.33m | 10:07AM0.39m | 9:12PM0.40m | 11:53AM0.36m | 10:48PM0.43m | 1:14PM0.27m | 1:20AM0.38m | 2:10PM0.16m | 1:30AM0.28m | 2:54PM0.07m | 2:26AM0.18m | 3:33PM0.00m | 3:14AM0.10m | |||||||
— | — | 7:01 | — | — | 7:00 | — | — | 7:58 | — | — | 7:56 | — | — | 7:56 | — | — | 7:54 | — | — | |
6:30 | — | — | 6:30 | — | — | 6:31 | — | — | 7:32 | — | — | 7:32 | — | — | 7:34 | — | — | 7:35 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 14 | 12 | 12 | 15 | 12 | 12 | 14 | 12 | 13 | 14 | 11 | 11 | 13 | 10 | 13 | 14 | 12 | 14 | 15 | 12 |
Feels °C | 8 | 7 | 7 | 9 | 7 | 8 | 10 | 8 | 11 | 11 | 9 | 8 | 9 | 5 | 10 | 10 | 8 | 11 | 12 | 10 |
Swell 1 Height (m) Direction Period (s) | WSW 15 | WSW 13 | SW 8 | WSW 13 | SW 8 | SW 8 | SW 18 | SW 9 | SW 15 | SW 14 | SW 14 | SW 14 | SW 14 | SW 13 | SW 13 | SW 12 | WSW 12 | WSW 14 | WSW 14 | WSW 13 |
1275 | 1697 | 274 | 476 | 439 | 283 | 607 | 210 | 784 | 1079 | 776 | 799 | 787 | 560 | 431 | 358 | 260 | 425 | 384 | 290 | |
Swell 2 Height (m) Direction Period (s) | — | — | WSW 13 | SW 23 | WSW 13 | WSW 12 | SW 12 | SW 16 | SW 9 | — | — | — | — | WSW 4 | SW 5 | WSW 18 | SW 6 | SW 6 | NW 13 | WSW 6 |
— | — | 577 | 21 | 330 | 247 | 147 | 748 | 176 | — | — | — | — | 13 | 22 | 60 | 44 | 44 | 6 | 7 | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | SW 21 | SW 18 | — | SW 12 | — | — | — | — | — | WSW 19 | WSW 18 | W 14 | WSW 16 | NW 13 | — | NW 12 |
— | — | — | — | 220 | 491 | — | 142 | — | — | — | — | — | 72 | 104 | 4 | 146 | 7 | — | 6 | |
Wind waves Height (m) Direction Period (s) | SW 5 | — | — | SW 8 | — | — | SW 9 | — | — | — | — | — | SW 4 | — | — | SW 5 | — | — | SW 5 | SW 4 |
71 | — | — | 373 | — | — | 359 | — | — | — | — | — | 10 | — | — | 42 | — | — | 30 | 6 | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 364 | 48 | 121 | 1131 | 43 | 48 | 229 | 0 | 0 | 229 | 0 | 65 | 108 | 43 | 48 | 60 | 43 | 48 | 48 | 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.










