Surf Forecasts:
Isla Negra surf forecast from 23 Jul 2026:
- Best quality surf: Thursday 23 Jul, 8PM (local time) - 8ft (2.4m), 12s period, W swell with glassy winds.
- Most powerful swell: Monday 27 Jul, 2PM (local time) - 10ft (3.0m), 13s period, WSW swell with 2,774 kJ wave energy.
- Next surfable swell (1★+): Thursday 23 Jul, 8PM (local time) - 8ft (2.4m), 12s period with W swell.
Best Forecast Surf Conditions for Isla Negra this week:
The surf forecast for Isla Negra over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Thursday (Jul 23) at 8PM. The primary swell is predicted to be 2.4m and 12s period with a secondary swell of 0.2m and 18s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Isla Negra in the next 16 days are 3.0m 13s and forecast to arrive on Monday (Jul 27) at 2PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.5m 9s period and expected on Friday (Jul 24) at 8PM.
| Wave Type | Time (-04) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 8PM (Thu 23rd Jul) | 8ft (2.4m) 12s |
| Best Surf | 8PM (Thu 23rd Jul) | 8ft (2.4m) 12s |
| Most Powerful | 2PM (Mon 27th Jul) | 10ft (3.0m) 13s |
Table - best surf conditions forecast for Isla Negra over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s look at what’s shaping up for the next couple of weeks.
We’re starting off with a bit of a waiting game. Thursday is a write-off with onshore winds and poor quality, so we’ll have to be patient. The real action doesn’t kick off until Friday, then we’ve got a few decent days before a big, messy pulse of swell arrives, and then another cleaner window opens up in the second week.
Isla Negra is our only spot on the radar, and it’s an advanced reef break that’s very consistent. Water temperature is sitting at 55°F, which is pretty much bang on average for this time of year.
The first standout is Friday morning, 24 July. The wind goes offshore from the SSE, light at 6 mph, and we’ve got a clean 6 ft west swell with an 11-second period. The combined energy is moderate at 813. It’s not massive, but the conditions will be clean and lined up. Good energy for the reef.
The next highlight is Monday, 27 July. This is a big one for the experienced crew, but it comes with a massive caveat. The wind is onshore from the N and NW, blowing at 6 mph, and the swell jumps up to 8 ft to 10 ft from the W and WSW, with a long 12 to 13-second period. The combined energy is strong to very strong (2182 and 2354). For a surfer, the wind is a real problem here, making it look more like a kitesurfing setup than a paddle session. Not recommended for beginners—only for experts.
After a few days of poor, windy conditions, we get a solid second-week window. Monday afternoon, 3 August is looking sweet. Glassy conditions with offshore SE wind at 3 mph, and a clean 5 ft W swell arriving with an 11-second period. The combined energy is moderate at 759. This is a proper clean session.
But the absolute best on offer is Tuesday morning, 4 August. The wind is cross-offshore from the S at just 3 mph, and we’re looking at a 7 ft WSW swell with a 12-second period. The combined energy is strong at 1180. This is excellent, clean surf for experienced surfers. The swell direction is a good match for the reef’s optimum, and the conditions will be clean. This is the one to circle on the calendar. Crowds are possible here, so get in early.
The run continues into the second week with some cleaner but smaller options, and another potential standout on Friday morning, 7 August. A 8 ft W swell with a 12-second period, combined energy of 1670, and clean cross-offshore winds from the SSW at 9 mph. That’s another excellent window for the experienced crew.
Rusty.
Short Range ForecastLight rain (total 3mm), mostly falling on Thu night. Very mild (max 18°C on Sat afternoon, min 13°C on Thu night). Wind will be generally light. | Days 4-6 Weather SummaryLight rain (total 6mm), mostly falling on Sun night. Very mild (max 17°C on Sun morning, min 13°C on Mon night). Wind will be generally light. | ||||||||||||||||||||
Thursday 23 | Friday 24 | Saturday 25 | Sunday 26 | Monday 27 | Tuesday 28 | Wednesday 29 | |||||||||||||||
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) | W 9 | W 12 | W 11 | W 11 | W 11 | W 10 | W 10 | WSW 15 | W 10 | WSW 13 | W 9 | W 9 | W 13 | WSW 12 | W 12 | W 11 | W 12 | W 12 | W 12 | W 11 | WSW 12 |
Wave Graph  | |||||||||||||||||||||
 kJ | 203 | 1103 | 1172 | 813 | 639 | 338 | 247 | 225 | 207 | 207 | 168 | 526 | 2182 | 2354 | 1513 | 621 | 775 | 472 | 404 | 223 | 478 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | on | cross-off | off | cross-off | glassy | glassy | cross-off | glassy | on | on | cross-on | on | on | cross-on | on | on | off | off | off | cross-off |
High Tide | 6:08PM0.75m | 6:50AM1.13m | 7:30PM0.74m | 7:45AM1.19m | 8:29PM0.77m | 8:32AM1.25m | 9:12PM0.80m | 9:13AM1.31m | 9:48PM0.84m | 9:50AM1.37m | 10:21PM0.88m | 10:24AM1.41m | 10:53PM0.91m | ||||||||
Low Tide | 12:43PM0.44m | 11:50PM0.42m | 1:53PM0.39m | 00:51AM0.42m | 2:45PM0.32m | 1:45AM0.39m | 3:27PM0.26m | 2:31AM0.34m | 4:03PM0.20m | 3:11AM0.28m | 4:36PM0.16m | 3:48AM0.24m | 5:07PM0.12m | 4:23AM0.20m | |||||||
 |  |  |  | |  | | |  | | |  | | | | | | | | | | |
 | 7:43 | — | — | 7:43 | — | — | 7:43 | — | — | 7:41 | — | — | 7:41 | — | — | 7:41 | — | — | 7:39 | — | — |
 | — | 6:01 | — | — | 6:01 | — | — | 6:02 | — | — | 6:04 | — | — | 6:04 | — | — | 6:05 | — | — | 6:06 | — |
mm | — | 1 | 2 | — | — | — | — | — | — | — | — | 4 | 1 | — | — | 1 | — | — | — | — | — |
Temp °C | 14 | 14 | 14 | 16 | 16 | 15 | 16 | 18 | 17 | 17 | 17 | 16 | 15 | 15 | 14 | 14 | 15 | 13 | 14 | 17 | 16 |
Feels °C | 11 | 11 | 13 | 14 | 15 | 14 | 16 | 16 | 16 | 15 | 14 | 14 | 14 | 14 | 14 | 13 | 13 | 12 | 12 | 15 | 15 |
Swell 1 Height (m) Direction Period (s) | W 9 | W 12 | W 11 | W 11 | W 11 | W 10 | W 10 | W 10 | W 10 | W 9 | W 9 | W 9 | W 13 | WSW 12 | W 12 | W 11 | W 12 | W 12 | W 12 | W 11 | WSW 12 |
| kJ | 203 | 1103 | 1172 | 813 | 639 | 338 | 247 | 196 | 186 | 207 | 168 | 526 | 2182 | 2354 | 1513 | 621 | 775 | 472 | 404 | 223 | 478 |
Swell 2 Height (m) Direction Period (s) | WSW 20 | WSW 19 | WSW 18 | SW 21 | SW 9 | SW 9 | WSW 16 | WSW 15 | WSW 14 | WSW 13 | WSW 13 | WSW 16 | SSW 13 | — | NW 16 | WSW 13 | SW 9 | SW 8 | WSW 15 | WSW 13 | SSW 8 |
| kJ | 37 | 35 | 31 | 69 | 31 | 39 | 140 | 225 | 207 | 195 | 135 | 223 | 17 | — | 10 | 204 | 41 | 11 | 85 | 195 | 6 |
Swell 3 Height (m) Direction Period (s) | SSW 11 | WNW 20 | NW 20 | — | WSW 18 | WSW 16 | SW 9 | SW 18 | WSW 20 | WSW 18 | WSW 17 | — | — | — | — | SW 10 | — | SW 16 | SSW 9 | SSW 9 | NW 12 |
| kJ | 11 | 39 | 15 | — | 31 | 103 | 27 | 81 | 75 | 130 | 160 | — | — | — | — | 79 | — | 10 | 8 | 8 | 6 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | N 3 | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | 8 | — | — | — | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 13 | 1 | 1 | 48 | 1 | 58 | 20 | 0 | 0 | 0 | 0 |
Best forecast wave conditions in Santiago | |||||||||||||||||||||
Best forecast wave conditions in Chile | |||||||||||||||||||||
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Information about the Isla Negra Surf forecast
The above surf forecast table for Isla Negra provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Isla Negra can be found by selecting the local surf guide option on the grey menu. Our Isla Negra 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 (Isla Negra) 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 Isla Negra 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.
Isla Negra is 19 km (12 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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