Surf Forecasts:
Matanzas surf forecast from 20 Aug 2026:
- Best quality surf: Wednesday 26 Aug, 8AM (local time) - 6ft (1.9m), 12s period, WSW swell with glassy winds.
- Most powerful swell: Thursday 20 Aug, 8AM (local time) - 6ft (1.9m), 13s period, WSW swell with 1,170 kJ wave energy.
- Next surfable swell (1★+): Saturday 22 Aug, 2AM (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 Saturday (Aug 22) at 2AM. The primary swell is predicted to be 1.6m and 10s period. 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 13s and forecast to arrive on Thursday (Aug 20) at 8AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.2m 2s period and expected on Sunday (Aug 23) at 5PM.
| Wave Type | Time (-04) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 2AM (Sat 22nd Aug) | 5ft (1.6m) 10s |
| Best Surf | 8AM (Wed 26th Aug) | 6ft (1.9m) 12s |
| Most Powerful | 8AM (Thu 20th Aug) | 6ft (1.9m) 13s |
Table - best surf conditions forecast for Matanzas over the next 16 days.
The Lowdown
Alright, let me chew through this one for ya, in feet and all.
First off, the early part of the run is pretty average. You’ve got a messy cross-shore breeze and only marginal quality. Swell is running about 4 to 6 feet from the WSW, with a period of 11 to 13 seconds, pushing moderate energy (in the 500 to 1000 range). It’s not flat, but it’s not clean – that wind is ruining the surface. Water temp is around 56°F, pretty normal for this time of year.
Things get a little more interesting on Sunday the 23rd. That afternoon the wind drops to glassy, with a 2-foot W swell at 11 seconds. Energy is light at 218, but it’ll be smooth as butter – great for a log or a longboard.
Now, Wednesday the 26th morning is your first real standout. We’ve got a solid 6 to 7 foot WSW swell, 12 second period, combined energy at 1201 (moderate), and wind is glassy from the NW. That’s clean, lined-up surf at Matanzas, a very consistent reef break that loves a SW swell. Too big for beginners, but for experienced surfers it’s gonna be firing.
Following that, Friday the 28th morning gets proper big – 13 feet from the WSW at 15 seconds, combined energy at 5989 (strong). That’s a long-period groundswell, powerful and for experts only. Wind stays light and cross-shore, not glassy, but the size and power will be extreme.
Saturday the 29th morning is another glassy morning with an 8-foot WSW swell, 13 second period, energy at 2266. Clean and chunky – excellent for experienced surfers at Matanzas.
After that, through the end of August and into the first days of September, the wind turns on again, mostly cross-shore and fresh, making things lumpy. There’s a couple of interesting moments – like the 1st of September morning with a 3-foot swell but a very long 17 second period (energy 803), but the cross-shore wind kills it. The 4th of September brings another 7-foot SW groundswell but with moderate cross-shore wind, so not as clean.
Your best bet is that Wednesday the 26th morning – glassy, solid 6-7 foot swell, perfect direction. That’s the one to circle on the calendar. Friday the 28th is for the big-wave specialists only.
Keep it between the flags, and go get that Wednesday glass.
Rusty
Short Range ForecastMostly dry. Very mild (max 18°C on Fri afternoon, min 10°C on Thu morning). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Very mild (max 16°C on Mon afternoon, min 12°C on Sun morning). Wind will be generally light. | ||||||||||||||||||||
Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | Wednesday 26 | |||||||||||||||
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 13 | WSW 12 | WSW 12 | WSW 11 | WSW 11 | WSW 10 | WSW 11 | SW 8 | SW 8 | SW 8 | W 11 | WSW 13 | WSW 12 | WSW 11 | SW 12 | WSW 15 | WSW 14 | WSW 13 | WSW 12 | WSW 12 | WSW 12 |
Wave Graph  | |||||||||||||||||||||
 kJ | 825 | 1047 | 505 | 380 | 687 | 510 | 425 | 181 | 181 | 128 | 114 | 154 | 265 | 230 | 141 | 188 | 210 | 372 | 1158 | 1102 | 805 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross-off | cross | cross | cross-off | cross | cross | glassy | cross | glassy | glassy | cross-on | cross-on | glassy | glassy | cross-on | glassy | glassy | cross-on | cross |
High Tide | 4:02PM0.74m | 4:56AM1.07m | 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 | ||||||||
Low Tide | 10:45AM0.48m | 9:44PM0.48m | 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 | |||||||
 | |  |  | |  |  | | | | | | | |  | | | | | | | |
 | 7:20 | — | — | 7:18 | — | — | 7:18 | — | — | 7:16 | — | — | 7:15 | — | — | 7:13 | — | — | 7:13 | — | — |
 | — | 6:21 | — | — | 6:22 | — | — | 6:22 | — | — | 6:22 | — | — | 6:23 | — | — | 6:23 | — | — | 6:24 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 14 | 15 | 14 | 15 | 18 | 16 | 17 | 16 | 15 | 15 | 15 | 13 | 15 | 16 | 15 | 15 | 16 | 15 | 16 | 16 | 14 |
Feels °C | 11 | 11 | 10 | 11 | 14 | 13 | 14 | 11 | 14 | 14 | 14 | 12 | 14 | 15 | 13 | 14 | 14 | 13 | 15 | 14 | 14 |
Swell 1 Height (m) Direction Period (s) | WSW 13 | WSW 12 | SW 8 | WSW 11 | WSW 11 | WSW 10 | WSW 11 | SW 8 | SW 8 | SW 8 | SW 7 | WSW 13 | WSW 12 | WSW 11 | WSW 10 | WSW 15 | WSW 9 | WSW 13 | WSW 12 | WSW 12 | WSW 12 |
| kJ | 825 | 1047 | 186 | 380 | 687 | 510 | 425 | 181 | 181 | 128 | 75 | 154 | 265 | 230 | 116 | 188 | 133 | 372 | 1158 | 1102 | 805 |
Swell 2 Height (m) Direction Period (s) | SW 6 | W 21 | WSW 12 | SW 8 | SW 18 | — | SW 12 | WSW 10 | W 10 | W 9 | W 11 | SW 6 | SW 12 | SSW 12 | SW 12 | WSW 10 | WSW 14 | WSW 9 | WSW 21 | WSW 20 | WSW 20 |
| kJ | 43 | 9 | 505 | 159 | 13 | — | 6 | 106 | 67 | 42 | 114 | 27 | 71 | 90 | 141 | 83 | 210 | 140 | 43 | 40 | 137 |
Swell 3 Height (m) Direction Period (s) | W 21 | — | SW 20 | SW 19 | — | — | SW 16 | SSW 12 | SSW 11 | WSW 11 | SW 11 | W 10 | SW 6 | WSW 16 | W 16 | — | SW 11 | — | — | — | — |
| kJ | 9 | — | 15 | 14 | — | — | 10 | 13 | 44 | 43 | 29 | 46 | 11 | 26 | 20 | — | 20 | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | NNE 2 | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | 1 | — | — | — | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 43 | 364 | 48 | 43 | 120 | 0 | 48 | 43 | 0 | 5 | 0 | 0 | 60 | 48 | 0 | 0 | 48 | 0 | 0 | 55 | 16 |
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.
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