Surf Forecasts:
Matanzas surf forecast from 16 Aug 2026:
- Best quality surf: Wednesday 19 Aug, 2AM (local time) - 4.5ft (1.3m), 16s period, WSW swell with glassy winds.
- Most powerful swell: Wednesday 19 Aug, 11AM (local time) - 6.5ft (2.0m), 15s period, WSW swell with 1,716 kJ wave energy.
- Next surfable swell (1★+): Monday 17 Aug, 5AM (local time) - 3.5ft (1.0m), 14s 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 Monday (Aug 17) at 5AM. The primary swell is predicted to be 1.0m and 14s period with a secondary swell of 1.3m and 7s. 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 2.0m 15s and forecast to arrive on Wednesday (Aug 19) at 11AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.1m 6s period and expected on Thursday (Aug 20) at 2PM.
| Wave Type | Time (-04) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 5AM (Mon 17th Aug) | 3.5ft (1.0m) 14s |
| Best Surf | 2AM (Wed 19th Aug) | 4.5ft (1.3m) 16s |
| Most Powerful | 11AM (Wed 19th Aug) | 6.5ft (2.0m) 15s |
Table - best surf conditions forecast for Matanzas over the next 16 days.
The Lowdown
Alright, let me get this sorted. The only spot on the radar for the next couple of weeks is Matanzas. It's a reef break, very consistent, exposed to a SW swell, and the optimum swell direction is from the southwest. It's an intermediate-level wave.
We've got a bit of a slow start here. The Sunday the 16th is a write-off—cross-shore wind, messy, not worth paddling out. The water temperature is sitting at 56°, which is just about average for this time of year, so no surprises there.
Monday the 17th morning is where things get interesting. That's the first real chance. We've got glassy conditions, zero wind, and a clean 3ft swell from the WSW with a 13-second period. That's a nice, long groundswell, which will really let this reef set up. The combined wave energy is moderate at 472. It's not a huge day, but for clean, user-friendly waves, it's a good pick. Crowds are *sometimes* an issue here, so you might have a bit of company, but that's the trade-off.
The real standout, the one to circle on the calendar, is Wednesday the 19th morning. Swell is up to 7ft from the WSW, period is 15 seconds, and we've got a clean, cross-off wind from the NNE. The combined energy is strong at 1972. This is excellent surf for experienced surfers—anything over 5ft is getting too big for beginners, and at 7ft you'll want your wits about you. The reef will handle that long-period energy well, giving you proper shaped waves with good gaps between sets.
After that, the week rolls on with moderate, workable swells, but the wind keeps it from being perfect. Thursday the 20th and Friday the 21st are okay, but lumpy cross-chop spoils it. Then we hit a quiet patch around Sunday the 23rd with small, weak, short-period 3ft–3ft swells. That’s a lull of about a couple of days with nothing special.
The second week looks promising again. Tuesday the 25th morning has a tiny 2ft swell but with offshore wind from the east and a 15-second period, so it will be clean and lined up. Not big, but fun.
But the big one, the one you really want to wait for, is Sunday the 30th morning. We're looking at 8ft from the WSW, clean cross-off wind from the NNE, and the combined wave energy is pumping at 2789. That's serious power, only for experienced surfers. The 12-second period will push in some meaty sets. After that, Monday the 31st sees the swell peak at 12ft with a 16-second period, combined energy of 6186, but the wind turns moderate cross-shore, which will mess up the face a bit. That's big, powerful, and only for the brave. The Sunday morning is the cleaner, better window for that late push.
So overall, don't bother with this weekend. Aim for Monday morning the 17th for a glassy intro, and lock in Wednesday the 19th morning and Sunday the 30th morning as the standouts. The long-range stuff at the end of the month is looking promising, but it's a ways out, so keep an eye on it.
Rusty.
Short Range ForecastMostly dry. Very mild (max 16°C on Tue afternoon, min 10°C on Sun morning). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Very mild (max 15°C on Thu afternoon, min 10°C on Fri night). Wind will be generally light. | ||||||||||||||||||||
Sunday 16 | Monday 17 | Tuesday 18 | Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | |||||||||||||||
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 13 | WSW 14 | WSW 13 | WSW 13 | SW 12 | SW 12 | WSW 15 | WSW 16 | WSW 15 | WSW 14 | WSW 13 | WSW 13 | WSW 12 | WSW 12 | WSW 11 | WSW 10 | WSW 11 | WSW 10 | SW 10 | SW 8 |
Wave Graph | |||||||||||||||||||||
362 | 330 | 367 | 336 | 317 | 694 | 488 | 773 | 904 | 1716 | 1376 | 1326 | 949 | 754 | 579 | 380 | 637 | 494 | 587 | 480 | 177 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross | glassy | cross-on | glassy | cross | cross | glassy | cross-off | on | cross-off | cross | cross | cross | cross | cross | cross-off | cross | cross | cross-off |
High Tide | 12:42PM1.32m | 1:14AM1.20m | 1:21PM1.16m | 1:56AM1.18m | 2:03PM1.00m | 2:43AM1.14m | 2:52PM0.85m | 3:41AM1.10m | 4:02PM0.74m | 4:56AM1.07m | 5:55PM0.69m | 6:19AM1.09m | 7:30PM0.72m | ||||||||
Low Tide | 7:01PM0.10m | 7:18AM0.23m | 7:34PM0.19m | 8:11AM0.33m | 8:09PM0.30m | 9:17AM0.43m | 8:49PM0.40m | 10:45AM0.48m | 9:44PM0.48m | 12:27PM0.47m | 11:09PM0.51m | 1:42PM0.40m | 00:32AM0.49m | ||||||||
7:24 | — | — | 7:24 | — | — | 7:22 | — | — | 7:20 | — | — | 7:20 | — | — | 7:18 | — | — | 7:18 | — | — | |
— | 6:17 | — | — | 6:19 | — | — | 6:20 | — | — | 6:20 | — | — | 6:21 | — | — | 6:22 | — | — | 6:22 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 12 | 13 | 11 | 12 | 14 | 12 | 14 | 16 | 12 | 13 | 14 | 12 | 14 | 15 | 13 | 13 | 14 | 13 | 13 | 15 | 15 |
Feels °C | 8 | 8 | 6 | 11 | 12 | 11 | 12 | 13 | 8 | 11 | 13 | 11 | 11 | 10 | 9 | 9 | 8 | 9 | 10 | 11 | 12 |
Swell 1 Height (m) Direction Period (s) | WSW 8 | WSW 13 | SW 7 | SW 7 | SW 8 | SW 12 | SW 12 | WSW 15 | WSW 16 | WSW 15 | WSW 14 | WSW 13 | WSW 13 | WSW 12 | WSW 12 | WSW 11 | WSW 13 | WSW 11 | WSW 10 | SW 10 | SW 8 |
137 | 330 | 212 | 132 | 178 | 694 | 488 | 773 | 904 | 1716 | 1376 | 1326 | 949 | 754 | 579 | 380 | 384 | 494 | 587 | 480 | 177 | |
Swell 2 Height (m) Direction Period (s) | WSW 13 | NW 10 | WSW 14 | WSW 13 | WSW 13 | WSW 18 | WSW 16 | WSW 11 | WSW 13 | SW 8 | SW 8 | — | W 21 | W 21 | SW 19 | SW 7 | — | SW 8 | SW 16 | W 16 | WSW 10 |
362 | 4 | 367 | 336 | 317 | 124 | 487 | 193 | 536 | 256 | 142 | — | 9 | 9 | 15 | 132 | — | 253 | 10 | 5 | 72 | |
Swell 3 Height (m) Direction Period (s) | NW 11 | — | NW 10 | NW 10 | SW 19 | N 10 | — | — | SW 8 | — | — | — | — | — | — | WSW 15 | — | — | — | W 14 | — |
4 | — | 4 | 4 | 15 | 2 | — | — | 186 | — | — | — | — | — | — | 167 | — | — | — | 4 | — | |
Wind waves Height (m) Direction Period (s) | — | SW 6 | — | — | — | — | — | SW 8 | — | — | — | — | — | SW 5 | SW 7 | — | WSW 10 | — | — | — | — |
— | 167 | — | — | — | — | — | 156 | — | — | — | — | — | 50 | 164 | — | 637 | — | — | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 60 | 364 | 48 | 0 | 48 | 0 | 43 | 291 | 0 | 0 | 59 | 0 | 48 | 364 | 43 | 48 | 291 | 16 | 16 | 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.











