
Surf Forecasts:
Cahuil surf forecast from 12 Jul 2026:
- Best quality surf: Monday 13 Jul, 8PM (local time) - 11ft (3.5m), 16s period, WSW swell with cross-shore winds.
- Most powerful swell: Monday 13 Jul, 8PM (local time) - 11ft (3.5m), 16s period, WSW swell with 6,094 kJ wave energy.
- Next surfable swell (1★+): Monday 13 Jul, 5AM (local time) - 3.5ft (1.1m), 21s period with W swell.
Best Forecast Surf Conditions for Cahuil this week:
The surf forecast for Cahuil over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Monday (Jul 13) at 5AM. The primary swell is predicted to be 1.1m and 21s period with a secondary swell of 0.9m and 13s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Cahuil in the next 16 days are 3.5m 16s and forecast to arrive on Monday (Jul 13) at 8PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 6.0m 11s period and expected on Thursday (Jul 16) at 11PM.
| Wave Type | Time (-04) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 5AM (Mon 13th Jul) | 3.5ft (1.1m) 21s |
| Best Surf | 8PM (Mon 13th Jul) | 11ft (3.5m) 16s |
| Most Powerful | 8PM (Mon 13th Jul) | 11ft (3.5m) 16s |
Table - best surf conditions forecast for Cahuil over the next 16 days.
Alright folks, Rusty here. Let's talk about the next couple of weeks at Cahuil. This is a river mouth setup, exposed to the southwest swell, and it's a spot that rarely breaks, so when it comes alive, it's a special deal. The water is sitting about 54°, which is a bit colder than we'd normally expect for this time of year.
The first few days are a bit of a write-off. Sunday afternoon kicks off with small, weak, onshore slop at 3 ft. It's not worth getting wet.
But then, Monday the 13th morning is where it gets interesting. The glassy conditions are a major score, and we've got a solid 8 ft groundswell pushing in from the WSW. The period is a very long 18 seconds, which means serious energy and proper lines, especially at a river mouth. The combined energy is a hefty 3737, so you'll feel the ocean breathing. This is one for the experienced crew though, as that size is pushing the limits for most.
The standout run looks to be from Monday through Tuesday. Monday morning is the pick of the bunch for clean conditions, but Monday afternoon sees a bigger 10 ft WSW swell roll in. The wind goes cross-on, but the energy is massive (5384). Tuesday morning the 14th offers a reprieve with clean cross-off wind and that same 10 ft pulse, just a bit more manageable. This is the best window for the intermediate to expert surfer, with the river mouth offering the best shape for that long-period energy.
We get a bit of a lull mid-week, with Wednesday and Thursday seeing messy winds and smaller, weaker swell. The energy drops to 469-976, and it's not worth the paddle out.
The weekend of the 18th and 19th looks promising again. Saturday morning has a clean 5 ft SW swell with light wind, and Sunday the 19th is a beauty: glassy conditions all day, with a building 6 ft WNW groundswell (period 12 seconds). The energy is moderate (1086) and the conditions are clean. This is a great option for a wider range of surfers.
Now, looking ahead to the 20th, that's a big red flag. Monday the 20th is forecast to have a massive 16 ft swell. The combined energy is 5806, which is enormous. It's simply too big for this break, even with favorable wind. Leave that one for the tow crews or just watch from the bluff.
The latter part of the forecast, from the 22nd to the 25th, sees a return to solid, clean conditions. The 23rd and 24th are standouts, with glassy or clean cross-off winds and 8 ft to 10 ft WSW groundswells (period 11-12 seconds). The energy is strong (1177-2751). This is another prime window for experienced surfers, and the river mouth will be handling it well.
The last few days of the month taper off with smaller, choppier conditions. The 27th has a long-period 17-second swell, but it's only 3 ft and onshore, so don't expect much.
Best on offer: The Monday 13th morning glass-off session, and the Sunday 19th glassy all-day session. The 24th and 25th also look solid for a clean, powerful swell. Crowds at Cahuil can be an issue when it's on, so get there early.
Rusty.
Short Range ForecastMostly dry. Very mild (max 18°C on Sun afternoon, min 11°C on Sun night). Wind will be generally light. | Days 5-7 Weather SummaryHeavy rain (total 93mm), heaviest during Thu night. Very mild (max 15°C on Thu morning, min 10°C on Sat morning). Winds decreasing (near gales from the NNE on Thu night, calm by Fri night). | ||||||||||||||||||||
Sun 12 | Monday 13 | Tuesday 14 | Wednesday 15 | Thursday 16 | Friday 17 | Saturday 18 | |||||||||||||||
PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | |
Swell Height Map | |||||||||||||||||||||
Wave Height (m) Direction Period (s) | SW 12 | SW 13 | WSW 18 | WSW 16 | WSW 14 | WSW 13 | WSW 13 | WSW 12 | W 9 | WNW 8 | WNW 9 | WSW 11 | SW 16 | SW 15 | WSW 12 | WSW 12 | SW 12 | SW 11 | SW 11 | W 12 | WNW 12 |
Wave Graph | |||||||||||||||||||||
220 | 342 | 3481 | 5145 | 5192 | 3541 | 2359 | 1170 | 281 | 300 | 262 | 366 | 132 | 370 | 589 | 1117 | 865 | 553 | 396 | 456 | 741 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | glassy | cross-on | glassy | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross | off | cross-off | cross-off | off | glassy |
High Tide | 9:07PM0.89m | 9:21AM1.59m | 10:01PM0.93m | 10:12AM1.66m | 10:51PM0.98m | 11:02AM1.68m | 11:39PM1.01m | 11:49AM1.65m | 00:26AM1.04m | 12:34PM1.56m | 1:13AM1.06m | 1:19PM1.43m | 2:02AM1.08m | ||||||||
Low Tide | 3:22PM0.11m | 2:36AM0.19m | 4:14PM0.02m | 3:30AM0.13m | 5:02PM-0.04m | 4:22AM0.08m | 5:48PM-0.06m | 5:12AM0.07m | 6:32PM-0.05m | 6:03AM0.10m | 7:15PM-0.01m | 6:54AM0.17m | 7:56PM0.06m | 7:49AM0.26m | |||||||
— | — | 7:52 | — | — | 7:52 | — | — | 7:52 | — | — | 7:50 | — | — | 7:50 | — | — | 7:50 | — | — | 7:50 | |
5:53 | — | — | 5:54 | — | — | 5:54 | — | — | 5:55 | — | — | 5:55 | — | — | 5:57 | — | — | 5:58 | — | 5:58 | |
mm | — | — | — | — | — | — | — | — | — | 2 | — | — | 4 | 44 | 4 | 8 | 28 | 3 | 4 | 9 | — |
Temp °C | 18 | 13 | 16 | 16 | 13 | 14 | 15 | 13 | 14 | 14 | 14 | 15 | 15 | 13 | 13 | 13 | 12 | 12 | 12 | 11 | 11 |
Feels °C | 16 | 11 | 15 | 14 | 12 | 13 | 13 | 10 | 11 | 11 | 12 | 8 | 7 | 2 | 9 | 10 | 12 | 11 | 9 | 10 | 10 |
Swell 1 Height (m) Direction Period (s) | SW 12 | SW 13 | WSW 18 | WSW 16 | WSW 14 | WSW 13 | WSW 13 | WSW 12 | W 9 | WNW 8 | WNW 9 | WSW 11 | WSW 10 | SW 15 | WSW 12 | WSW 12 | N 10 | N 9 | SW 11 | NNW 8 | WNW 12 |
220 | 342 | 3481 | 5145 | 5192 | 3541 | 2359 | 1170 | 281 | 300 | 262 | 366 | 78 | 370 | 589 | 1117 | 1390 | 521 | 396 | 207 | 741 | |
Swell 2 Height (m) Direction Period (s) | W 9 | W 9 | SW 13 | SW 13 | — | — | — | WNW 14 | SW 11 | SW 10 | WSW 9 | NW 8 | SW 11 | — | SW 14 | WNW 10 | SW 12 | SW 11 | WNW 10 | W 12 | SW 11 |
56 | 56 | 205 | 205 | — | — | — | 21 | 233 | 100 | 106 | 110 | 80 | — | 387 | 532 | 865 | 553 | 285 | 456 | 233 | |
Swell 3 Height (m) Direction Period (s) | SSW 15 | W 22 | W 8 | W 8 | — | — | — | NW 10 | NW 14 | W 10 | SW 11 | W 9 | SW 16 | — | — | WSW 15 | WNW 10 | WNW 10 | W 12 | SW 11 | NNW 7 |
142 | 247 | 51 | 34 | — | — | — | 4 | 8 | 69 | 125 | 41 | 132 | — | — | 42 | 480 | 411 | 146 | 220 | 18 | |
Wind waves Height (m) Direction Period (s) | SW 4 | SW 4 | — | — | — | — | NNE 3 | NE 4 | N 5 | — | — | N 6 | NNW 9 | NNW 11 | NNW 10 | N 10 | — | — | N 8 | — | N 7 |
7 | 5 | — | — | — | — | 9 | 5 | 66 | — | — | 252 | 2692 | 6226 | 2469 | 1707 | — | — | 270 | — | 32 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 11 | 7 | 0 | 11 | 5 | 0 | 111 | 5 | 101 | 0 | 0 | 494 | 1202 | 216 | 216 | 5 | 0 | 0 | 0 | 0 | 0 |
Best forecast wave conditions in Santiago | |||||||||||||||||||||
Best forecast wave conditions in Chile | |||||||||||||||||||||
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Information about the Cahuil Surf forecast
The above surf forecast table for Cahuil provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Cahuil can be found by selecting the local surf guide option on the grey menu. Our Cahuil 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 (Cahuil) 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 Cahuil 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.











