
Surf Forecasts:
Matanzas surf forecast from 15 Sep 2026:
- Best quality surf: Thursday 17 Sep, 9PM (local time) - 4.5ft (1.3m), 12s period, WSW swell with glassy winds.
- Most powerful swell: Monday 21 Sep, 6PM (local time) - 6ft (1.8m), 10s period, WSW swell with 590 kJ wave energy.
- Next surfable swell (1★+): Thursday 17 Sep, 6AM (local time) - 4ft (1.2m), 7s 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 6AM. The primary swell is predicted to be 1.2m and 7s 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 1.8m 10s and forecast to arrive on Monday (Sep 21) at 6PM. 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+) | 6AM (Thu 17th Sep) | 4ft (1.2m) 7s |
| Best Surf | 9PM (Thu 17th Sep) | 4.5ft (1.3m) 12s |
| Most Powerful | 6PM (Mon 21st Sep) | 6ft (1.8m) 10s |
Table - best surf conditions forecast for Matanzas over the next 16 days.
The Lowdown
G’day, it’s Rusty. Let’s break down what’s coming at Matanzas over the next couple of weeks. It starts off pretty average, but there are some absolute crackers waiting if you can hold tight. The water temp is a normal 56°F for this time of year – nothing special.
We start off Tuesday the 15th with a small, messy 4ft WSW swell with a cross-onshore breeze. The combined energy is moderate at 405, but the surface is choppy – not worth your time. Wednesday the 16th is the same story with tiny 2ft to 2ft swell and cross or cross-onshore wind. Keep the board in the car.
Thursday the 17th morning shows a little life. It’s only 4ft from the SW with a short 7-second period, but the wind turns light and cross-offshore, leaving it clean. The energy is moderate at 222. It’s small, but a longboard might snag a couple. The afternoon gets choppy again.
Friday the 18th is marginal, 3ft with light cross-shore wind – small and rippled. Saturday the 19th morning cleans up again with light cross-offshore wind and the same 3ft SW swell. It’s tiny but rideable. Sunday the 20th morning is similar, 4ft from the WSW, clean cross-offshore breeze, and moderate energy at 335. A short window of surfable waves.
Monday the 21st morning pushes up to 5ft from the WSW with a 9-second period, but the wind is light cross-shore with a bit of chop – it’s marginal. That afternoon a fresh 19 mph cross-onshore blows in, making it lumpy and ugly. Best to sit it out.
From Tuesday the 22nd through Wednesday the 23rd, the swell drops under 3ft with light wind but poor quality. Nothing happening.
Now for the good stuff. Thursday the 24th morning: a solid 8ft WSW groundswell with a 12-second period arrives. The combined energy jumps to a strong 1510. The wind is light cross-offshore and it’s clean. This is for experienced surfers only – over 8ft. The long period means more power and longer lulls between sets, making paddling out a bit easier. This is a standout.
Friday the 25th morning is the absolute pick. We’ve got a big 10ft WSW groundswell with an 11-second period, and the energy is huge at 2091. Light cross-offshore wind and clean. This is heavy, powerful stuff – strictly for the experienced crew. The longer-period swell will make it hold great shape on the reef. Unreal.
Saturday the 26th morning is still solid at 6ft from the west, 10-second period, with clean cross-offshore wind and strong energy at 1369. Still very good for experienced surfers. The afternoon gets a bit choppy.
Sunday the 27th morning has 6ft from the SW, but cross-onshore wind makes it marginal. That afternoon the wind goes offshore, but conditions are reported as unknown, so be cautious.
Monday the 28th and Tuesday the 29th drop to around 4ft from the SW with a short 8-second period and light wind – marginal, not great. Tuesday the 30th morning is another highlight: 4ft of very long-period SW groundswell with a 15-second period and clean, light cross-offshore wind. The energy is very strong at 1237. That long period will give it heaps of push and shape – should be firing on the reef. The afternoon blows out. For the best of the best, lock in Friday the 25th morning. Thursday the 24th and Tuesday the 30th mornings are also top-tier.
Signing off, Rusty.
Short Range ForecastMostly dry. Very mild (max 18°C on Thu morning, min 12°C on Tue night). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Very mild (max 19°C on Sat afternoon, min 13°C on Sun night). Wind will be generally light. | |||||||||||||||||||
Tue 15 | Wednesday 16 | Thursday 17 | Friday 18 | Saturday 19 | Sunday 20 | Monday 21 | ||||||||||||||
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 | WSW 12 | WSW 12 | SW 12 | SW 6 | SW 7 | WSW 13 | WSW 12 | WSW 11 | WSW 11 | WSW 10 | WSW 10 | WSW 11 | WSW 11 | WSW 11 | WSW 10 | WSW 10 | WSW 9 | WSW 9 | WSW 10 |
Wave Graph | ||||||||||||||||||||
336 | 289 | 94 | 142 | 126 | 97 | 289 | 199 | 214 | 206 | 195 | 157 | 366 | 451 | 322 | 304 | 471 | 360 | 375 | 358 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross | cross | cross-on | cross | cross-off | cross-on | glassy | cross | cross-on | cross | cross-off | cross-on | cross-on | cross-off | cross | cross | cross | cross-on | cross |
High Tide | 2:09AM1.26m | 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 | ||||||||
Low Tide | 7:40PM0.26m | 8:42AM0.31m | 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 | |||||||
— | — | 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 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 17 | 14 | 17 | 17 | 15 | 18 | 17 | 12 | 16 | 17 | 15 | 17 | 19 | 15 | 15 | 15 | 15 | 16 | 17 | 14 |
Feels °C | 14 | 12 | 15 | 13 | 11 | 16 | 15 | 12 | 15 | 16 | 14 | 15 | 16 | 14 | 12 | 13 | 13 | 12 | 12 | 12 |
Swell 1 Height (m) Direction Period (s) | WSW 12 | WSW 12 | SW 6 | SW 12 | SW 6 | SW 7 | WSW 13 | WSW 8 | WSW 11 | WSW 11 | WSW 10 | WSW 10 | WSW 11 | WSW 11 | WSW 11 | WSW 10 | WSW 10 | WSW 9 | SW 10 | WSW 10 |
336 | 289 | 30 | 142 | 126 | 97 | 289 | 106 | 214 | 206 | 195 | 157 | 366 | 451 | 322 | 304 | 471 | 360 | 144 | 358 | |
Swell 2 Height (m) Direction Period (s) | NW 13 | SW 7 | WSW 12 | W 10 | WSW 11 | WSW 11 | SW 10 | WSW 12 | SW 7 | WSW 18 | SW 6 | SW 6 | SW 6 | SW 19 | NW 13 | NW 13 | W 16 | SW 11 | S 15 | SW 9 |
6 | 54 | 94 | 16 | 78 | 65 | 4 | 199 | 63 | 31 | 39 | 43 | 15 | 14 | 7 | 7 | 5 | 80 | 4 | 122 | |
Swell 3 Height (m) Direction Period (s) | — | NW 12 | WSW 10 | NW 12 | W 15 | WSW 13 | SW 21 | WSW 20 | WSW 18 | — | WSW 17 | SW 12 | WNW 12 | W 13 | W 18 | — | — | WNW 12 | W 18 | SW 13 |
— | 6 | 38 | 6 | 17 | 60 | 18 | 38 | 34 | — | 27 | 39 | 15 | 3 | 6 | — | — | 14 | 6 | 7 | |
Wind waves Height (m) Direction Period (s) | SW 7 | — | — | SW 6 | — | — | SW 6 | — | — | SW 6 | — | — | — | — | — | — | — | — | WSW 9 | — |
63 | — | — | 62 | — | — | 58 | — | — | 28 | — | — | — | — | — | — | — | — | 375 | — | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 60 | 43 | 48 | 364 | 48 | 0 | 118 | 0 | 16 | 364 | 16 | 0 | 53 | 48 | 0 | 43 | 43 | 16 | 364 | 48 |
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.










