Surf Forecasts:
Isla Negra surf forecast from 29 Jul 2026:
- Best quality surf: Wednesday 5 Aug, 2AM (local time) - 5.5ft (1.7m), 13s period, WSW swell with offshore winds.
- Most powerful swell: Wednesday 5 Aug, 8AM (local time) - 7.5ft (2.3m), 15s period, WSW swell with 2,324 kJ wave energy.
- Next surfable swell (1★+): Wednesday 29 Jul, 8AM (local time) - 4.5ft (1.3m), 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 Wednesday (Jul 29) at 8AM. The primary swell is predicted to be 1.3m and 12s period. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Isla Negra in the next 16 days are 2.3m 15s and forecast to arrive on Wednesday (Aug 05) at 8AM. Winds are predicted to be glassy at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.5m 12s period and expected on Saturday (Aug 01) at 11AM.
| Wave Type | Time (-04) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 8AM (Wed 29th Jul) | 4.5ft (1.3m) 12s |
| Best Surf | 2AM (Wed 5th Aug) | 5.5ft (1.7m) 13s |
| Most Powerful | 8AM (Wed 5th Aug) | 7.5ft (2.3m) 15s |
Table - best surf conditions forecast for Isla Negra over the next 16 days.
The Lowdown
Alright, folks. Rusty here. Let’s break down the next 16 days. We’re looking at a bit of a slow start, but there’s a serious payoff if you’ve got the patience.
The first surfable waves show up on Wednesday, July 29th. Isla Negra has a small, clean start. We’re talking a 4ft W swell with a solid 12-second period, which gives it some shape. The morning is glassy with a light SE breeze. The combined wave energy is moderate at 433. The water temp is 56°, which is about average for this time of year. It’s a small window, but it’s there.
Then things go south. From Thursday, July 30th through Saturday, August 1st, it’s a mess. Strong onshore winds, choppy water, and the swell is poor. You’re better off staying on the beach.
Sunday, August 2nd, things start to turn. The morning is glassy again with a light E breeze, and the swell is a clean 5ft from the W with a period of 12 seconds. The energy is solid at 686. The afternoon gets even better with a cross-offshore breeze and the swell bumping to 6ft. This is a good sign.
But the real event is Wednesday, August 5th. This is the one to circle. Isla Negra wakes up to a massive 8ft WSW swell with a very long 15-second period. The combined wave energy is a whopping 2441 – that’s serious power. The morning is glassy, and the conditions are perfect for experienced surfers. This is a reef break, so that long-period groundswell will be a thing of beauty. It’s big and powerful, not for the beginners.
Thursday, August 6th, is still pumping with a 7ft WSW swell, offshore S winds in the morning, and strong energy at 1426.
After that, it goes flat. From Friday, August 7th through the end of the window, the swell is zero or tiny, with poor conditions. There’s a long stretch of nearly a week with nothing to ride.
The standout is Wednesday, August 5th at Isla Negra. That’s the one to plan for. The rest of the run is a mix of small, clean windows and long flat spells.
Rusty.
Short Range ForecastHeavy rain (total 41mm), heaviest during Fri morning. Very mild (max 17°C on Wed afternoon, min 12°C on Fri afternoon). Winds increasing (calm on Wed morning, strong winds from the NNE by Thu night). | Days 4-6 Weather SummaryMostly dry. Very mild (max 17°C on Mon morning, min 13°C on Sat morning). Wind will be generally light. | ||||||||||||||||||||
Wednesday 29 | Thursday 30 | Friday 31 | Saturday 1 | Sunday 2 | Monday 3 | Tuesday 4 | |||||||||||||||
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 12 | W 11 | WSW 11 | W 12 | W 11 | WNW 10 | NW 10 | NW 9 | W 10 | W 10 | W 9 | W 8 | W 12 | W 11 | W 11 | W 10 | WSW 12 | WSW 11 | WSW 10 | WSW 13 | WSW 13 |
Wave Graph  | |||||||||||||||||||||
 kJ | 390 | 351 | 205 | 220 | 588 | 855 | 408 | 367 | 235 | 90 | 140 | 147 | 686 | 819 | 859 | 669 | 847 | 655 | 424 | 854 | 1058 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | on | on | on | cross-on | cross-on | on | cross-on | cross | glassy | cross-on | cross-on | glassy | cross-off | cross-off | glassy | on | cross-on | cross-on | cross-off | off |
High Tide | 10:24AM1.41m | 10:53PM0.91m | 10:57AM1.43m | 11:25PM0.94m | 11:29AM1.41m | 11:58PM0.97m | 12:00PM1.37m | 00:31AM1.01m | 12:32PM1.29m | 1:06AM1.04m | 1:06PM1.20m | 1:46AM1.07m | 1:44PM1.08m | 2:32AM1.09m | |||||||
Low Tide | 5:07PM0.12m | 4:23AM0.20m | 5:37PM0.10m | 4:58AM0.19m | 6:06PM0.10m | 5:34AM0.21m | 6:34PM0.12m | 6:11AM0.24m | 7:02PM0.14m | 6:52AM0.29m | 7:31PM0.18m | 7:41AM0.34m | 8:04PM0.23m | ||||||||
 | |  |  | |  |  |  | | | |  |  | | | | | | | | | |
 | 7:39 | — | — | 7:39 | — | — | 7:39 | — | — | 7:37 | — | — | 7:37 | — | — | 7:35 | — | — | 7:35 | — | — |
 | — | 6:06 | — | — | 6:06 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | 6:08 | — | — | 6:09 | — |
mm | — | — | — | — | — | 3 | 35 | 3 | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 15 | 17 | 14 | 16 | 16 | 15 | 13 | 13 | 14 | 15 | 15 | 14 | 15 | 15 | 15 | 17 | 17 | 16 | 15 | 14 | 12 |
Feels °C | 15 | 14 | 14 | 12 | 11 | 9 | 8 | 7 | 12 | 14 | 13 | 13 | 14 | 14 | 13 | 16 | 15 | 14 | 14 | 12 | 9 |
Swell 1 Height (m) Direction Period (s) | W 12 | W 11 | WSW 11 | W 12 | W 11 | WNW 10 | NW 10 | NW 9 | W 10 | SW 12 | SW 12 | W 8 | W 12 | W 11 | W 11 | W 10 | WSW 12 | WSW 11 | WSW 10 | WSW 13 | WSW 13 |
| kJ | 390 | 351 | 205 | 220 | 588 | 855 | 408 | 367 | 235 | 667 | 561 | 147 | 686 | 819 | 859 | 669 | 847 | 655 | 424 | 854 | 1058 |
Swell 2 Height (m) Direction Period (s) | SW 8 | SSW 8 | SSW 8 | SW 8 | S 7 | WSW 12 | W 11 | WSW 10 | WNW 9 | NW 9 | W 9 | SW 11 | SW 11 | SW 11 | — | W 20 | WSW 18 | WSW 16 | WSW 14 | SW 18 | NW 11 |
| kJ | 16 | 6 | 6 | 2 | 1 | 155 | 375 | 265 | 157 | 77 | 140 | 202 | 57 | 29 | — | 7 | 31 | 146 | 264 | 53 | 5 |
Swell 3 Height (m) Direction Period (s) | WSW 15 | NW 15 | NW 15 | SW 15 | W 19 | NW 13 | WSW 16 | WSW 16 | N 7 | W 10 | NW 8 | WSW 13 | — | — | — | — | — | — | WSW 19 | NW 12 | — |
| kJ | 43 | 8 | 8 | 9 | 7 | 7 | 27 | 51 | 51 | 90 | 54 | 68 | — | — | — | — | — | — | 37 | 6 | — |
Wind waves Height (m) Direction Period (s) | — | — | — | N 3 | N 4 | N 5 | — | N 6 | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | 1 | 28 | 97 | — | 19 | — | — | — | — | — | — | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 1 | 1 | 58 | 97 | 97 | 97 | 58 | 1 | 0 | 82 | 1 | 0 | 0 | 0 | 0 | 58 | 13 | 48 | 450 | 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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