
Surf Forecasts:
Matanzas surf forecast from 12 Sep 2026:
- Best quality surf: Sunday 13 Sep, 3AM (local time) - 5ft (1.6m), 8s period, SW swell with cross-offshore winds.
- Most powerful swell: Friday 18 Sep, 9PM (local time) - 6ft (1.9m), 11s period, SW swell with 836 kJ wave energy.
- Next surfable swell (1★+): Sunday 13 Sep, 12AM (local time) - 4.5ft (1.3m), 9s 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 13) at 12AM. The primary swell is predicted to be 1.3m and 9s period with a secondary swell of 0.6m and 10s. 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 11s and forecast to arrive on Friday (Sep 18) at 9PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.2m 2s period and expected on Wednesday (Sep 16) at 9AM.
| Wave Type | Time (-04) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 12AM (Sun 13th Sep) | 4.5ft (1.3m) 9s |
| Best Surf | 3AM (Sun 13th Sep) | 5ft (1.6m) 8s |
| Most Powerful | 9PM (Fri 18th Sep) | 6ft (1.9m) 11s |
Table - best surf conditions forecast for Matanzas over the next 16 days.
The Lowdown
Yo, Rusty here. Let’s talk about Matanzas. This reef break is exposed to the southwest, and we’ve got a run of surf coming through the next couple weeks. The water temp is sitting at 56°F, which is pretty normal for this time of year, so nothing crazy there.
We start off Saturday the 12th with a 5ft SW swell, period 8 seconds – short period, but enough for a fun morning session. The cross-offshore breeze is light at 6 mph and it’s clean. It’s not huge, but it’s a solid intro. The afternoon goes choppy though, so get it early.
Sunday the 13th morning drops to 2ft from the WSW, but check this – period jumps to 18 seconds. That’s very long period groundswell. The energy reading is 576 (moderate), and with clean, light cross-off winds, this will be lined up and smooth. This is a standout morning – long period suits reefs like Matanzas, and it’ll be pure. Afternoon turns onshore and choppy for Sunday.
Monday the 14th morning brings 4ft from the WSW, period 14 seconds (still long), with energy at 935 (moderate to strong) and light cross-off winds. Another cracking morning. The sets will have heaps of push and the surface will be clean. This is your other top pick early in the run.
Tuesday the 15th morning has 4ft WSW, 13 seconds, energy 578, and again light cross-off winds – another very good session. The pattern holds: mornings are where it’s at. Each afternoon goes onshore and messy.
Wednesday the 16th morning has dropped to 3ft WSW, period 12 seconds, but the wind is glassy – NNE at 3 mph. That’s a major positive. The energy is lower at 239 (weak), but those clean, glassy conditions will make it super user-friendly.
From Thursday the 17th through Saturday the 21st, the surf quality takes a hit. Mornings only go marginal, with cross-shore or cross-on winds and energy hovering around 178-387 (weak to moderate). It’s choppy on the afternoons. There is a run of poor to ordinary conditions here for about five days – the windows are tight.
Sunday the 22nd morning gives you 3ft WSW, 10 seconds, with SSE light cross-off at 6 mph – surfable but ordinary.
Monday the 23rd morning is glassy again (NE 0 mph) with a 3ft SW swell, period just 7 seconds. The energy is 199 (weak). It’s clean, but short period will be a little weak.
The good news picks up Friday the 25th – both morning and afternoon see glassy conditions with 3ft and 3ft from the W/WSW, period 10 seconds, energy 258-264 (weak). Clean and surfable. Then Saturday the 26th morning has 4ft W swell, 11 seconds, glassy and calm – that’s another really good, clean session. The afternoon goes onshore again.
Sunday the 27th closes the window with poor conditions on both sessions – fresh cross-onshore winds up to 22 mph, lumpy and messy. Not worth it.
So, the real standouts here are the mornings of Sunday the 13th and Monday the 14th – long period groundswell, clean winds, good energy. Those are the ones to circle. The glassy mornings of Wednesday the 16th and Saturday the 26th are also worth a paddle for clean, smaller waves. Crowds at Matanzas are sometimes an issue, but on those standout mornings it’ll be worth dealing with.
Rusty.
Short Range ForecastMostly dry. Very mild (max 18°C on Mon afternoon, min 8°C on Sat morning). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Very mild (max 19°C on Tue afternoon, min 12°C on Tue night). Wind will be generally light. | ||||||||||||||||||||
Saturday 12 | Sunday 13 | Monday 14 | Tuesday 15 | Wednesday 16 | Thursday 17 | Friday 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) | SW 8 | SW 9 | SW 9 | WSW 18 | WSW 17 | WSW 16 | WSW 14 | WSW 14 | WSW 13 | WSW 13 | WSW 12 | WSW 12 | WSW 12 | WSW 12 | WSW 11 | WSW 11 | WSW 11 | WSW 12 | WSW 11 | WSW 12 | SW 11 |
Wave Graph | |||||||||||||||||||||
346 | 238 | 262 | 280 | 428 | 715 | 697 | 613 | 462 | 476 | 336 | 243 | 180 | 177 | 101 | 101 | 135 | 250 | 234 | 475 | 757 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-on | cross-off | cross-off | cross-on | cross | cross-off | cross | cross-off | cross-off | cross-on | glassy | glassy | cross-on | glassy | cross | cross-on | cross | cross | cross-on | cross |
High Tide | 11:57AM1.41m | 00:20AM1.31m | 12:34PM1.30m | 00:55AM1.33m | 1:10PM1.17m | 1:31AM1.31m | 1:47PM1.03m | 2:09AM1.26m | 2:27PM0.90m | 2:51AM1.18m | 3:15PM0.78m | 3:46AM1.11m | 4:31PM0.69m | ||||||||
Low Tide | 6:12PM0.01m | 6:26AM0.07m | 6:41PM0.08m | 7:09AM0.13m | 7:11PM0.16m | 7:53AM0.21m | 7:40PM0.26m | 8:42AM0.31m | 8:10PM0.35m | 9:43AM0.40m | 8:45PM0.44m | 11:10AM0.46m | 9:39PM0.52m | ||||||||
7:50 | — | — | 7:50 | — | — | 7:48 | — | — | 7:47 | — | — | 7:46 | — | — | 7:43 | — | — | 7:43 | — | — | |
— | 7:36 | — | — | 7:37 | — | — | 7:37 | — | — | 7:37 | — | — | 7:38 | — | — | 7:39 | — | — | 7:39 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 12 | 15 | 13 | 14 | 15 | 12 | 16 | 18 | 15 | 18 | 19 | 14 | 15 | 16 | 13 | 16 | 16 | 13 | 16 | 16 | 12 |
Feels °C | 8 | 10 | 9 | 11 | 12 | 8 | 13 | 14 | 12 | 15 | 16 | 13 | 14 | 15 | 12 | 14 | 14 | 9 | 14 | 13 | 8 |
Swell 1 Height (m) Direction Period (s) | SW 8 | SW 9 | SW 9 | SW 8 | SW 9 | SW 8 | WSW 14 | WSW 14 | WSW 13 | WSW 13 | WSW 12 | WSW 12 | WSW 12 | WSW 12 | WSW 11 | WSW 11 | WSW 11 | SW 6 | SW 7 | WSW 12 | SW 11 |
346 | 238 | 262 | 250 | 243 | 196 | 697 | 613 | 462 | 476 | 336 | 243 | 180 | 177 | 101 | 101 | 135 | 72 | 119 | 475 | 757 | |
Swell 2 Height (m) Direction Period (s) | WSW 16 | SW 10 | SW 10 | WSW 18 | WSW 17 | WSW 16 | SW 8 | NW 12 | SW 8 | SW 7 | SW 7 | SW 6 | SW 6 | SW 6 | SW 6 | SW 5 | WSW 13 | WSW 12 | WSW 11 | SW 18 | SW 18 |
27 | 106 | 84 | 280 | 428 | 715 | 233 | 5 | 145 | 97 | 67 | 60 | 51 | 33 | 23 | 17 | 59 | 250 | 234 | 13 | 12 | |
Swell 3 Height (m) Direction Period (s) | NW 13 | WSW 21 | WSW 20 | W 16 | W 15 | W 13 | NW 12 | — | NW 11 | NW 11 | NW 13 | NW 12 | W 10 | W 10 | W 15 | WSW 13 | SW 21 | WSW 20 | WSW 19 | — | NW 10 |
6 | 44 | 149 | 46 | 67 | 87 | 5 | — | 5 | 5 | 6 | 6 | 8 | 8 | 17 | 60 | 18 | 38 | 34 | — | 4 | |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | SW 8 | — | — | — | — | NNE 2 | — | — | — | SW 5 | — | — | SW 7 | — |
— | — | — | — | — | — | — | 208 | — | — | — | — | 1 | — | — | — | 31 | — | — | 91 | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 229 | 0 | 0 | 48 | 43 | 0 | 291 | 0 | 0 | 60 | 0 | 0 | 364 | 0 | 16 | 60 | 43 | 16 | 364 | 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.










