Surf Forecasts:
Isla Negra surf forecast from 26 Jul 2026:
- Best quality surf: Tuesday 28 Jul, 8PM (local time) - 6ft (1.9m), 11s period, W swell with glassy winds.
- Most powerful swell: Monday 27 Jul, 11PM (local time) - 8ft (2.5m), 13s period, WSW swell with 2,433 kJ wave energy.
- Next surfable swell (1★+): Tuesday 28 Jul, 8PM (local time) - 6ft (1.9m), 11s 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 Tuesday (Jul 28) at 8PM. The primary swell is predicted to be 1.9m and 11s period. 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 2.5m 13s and forecast to arrive on Monday (Jul 27) at 11PM. Winds are predicted to be cross-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 Wednesday (Jul 29) at 5AM.
| Wave Type | Time (-04) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 8PM (Tue 28th Jul) | 6ft (1.9m) 11s |
| Best Surf | 8PM (Tue 28th Jul) | 6ft (1.9m) 11s |
| Most Powerful | 11PM (Mon 27th Jul) | 8ft (2.5m) 13s |
Table - best surf conditions forecast for Isla Negra over the next 16 days.
The Lowdown
Alright, Rusty here. Let's break down what's happening at Isla Negra.
The next week and a half starts rough but there's a proper run of clean surf late July into early August that's worth getting keen on. Water temp is about 54°F, right on average for this time of year, nothing out of the ordinary.
Sunday the 26th is a write-off. Tiny 2ft cross-on slop from the WSW with weak energy – not worth it. Monday the 27th sees a pulse of 6ft to 7ft west swell, but onshore wind kills it. Tuesday the 28th stays similar, 7ft in the morning to 7ft in the afternoon, but still onshore and messy. A few days of nothing.
Wednesday the 29th morning is the first real highlight. A clean 4ft west swell, glassy conditions, 12-second period, and moderate energy. Wind is light from the SE, glassy flat. That afternoon is similar with 4ft and the same glass. This is your early window.
Thursday the 30th drops off hard – 3ft choppy cross-on junk. Friday the 31st has size again, 6ft in the morning, but onshore and sloppy with heavy rain. The afternoon has a 6ft cross-off that's cleaner but still marginal.
Now for the standout stuff. Saturday the 1st of August morning: 6ft west swell, 11-second period, glassy north wind. Expect very good conditions. That's your Saturday dawn patrol. Afternoon turns onshore.
Sunday the 2nd afternoon glass-off brings a clean 5ft west swell with 9-second period and glassy ENE wind – fun and clean. Monday the 3rd is solid: 5ft west in the morning with cross-off SSW wind, then the afternoon delivers a 4ft WSW swell with a long 16-second period – proper groundswell. That will wrap around the reef beautifully. Clean conditions.
Tuesday the 4th of August is the big one. Morning sees 7ft WSW swell, 13-second period, cross-off south wind – excellent conditions for experienced surfers, big energy. Afternoon is 6ft with similar quality. This is for the advanced crew only, but it's the pick of the run.
Wednesday the 5th drops to 4ft, still clean but marginal. Thursday the 6th has 4ft morning with a 14-second period and offshore south wind – clean and punchy. Friday the 7th holds around 5-5ft with clean cross-off wind.
Then it dies. Saturday the 8th is flat, 0.3ft. Sunday the 9th is tiny 2-3ft and poor. Monday the 10th has a 0.7ft swell with a 19-second period – no height.
Best bets: Wednesday the 29th morning glassy, Saturday the 1st August morning glassy, and Tuesday the 4th for the big swell crew. Monday the 3rd afternoon with that 16-second groundswell is a treat for the reef.
Rusty.
Short Range ForecastLight rain (total 8mm), mostly falling on Mon morning. Very mild (max 17°C on Sun afternoon, min 12°C on Tue night). Wind will be generally light. | Days 5-7 Weather SummaryHeavy rain (total 43mm), heaviest during Fri morning. Very mild (max 16°C on Thu morning, min 11°C on Fri afternoon). Winds increasing (calm on Wed afternoon, strong winds from the N by Thu night). | |||||||||||||||||||
Sun 26 | Monday 27 | Tuesday 28 | Wednesday 29 | Thursday 30 | Friday 31 | Saturday 1 | ||||||||||||||
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 16 | W 10 | W 14 | W 13 | W 12 | W 11 | W 12 | W 12 | W 11 | W 11 | WSW 12 | W 11 | W 10 | W 13 | W 12 | W 12 | W 11 | WSW 11 | W 10 |
Wave Graph  | ||||||||||||||||||||
 kJ | 178 | 223 | 546 | 1640 | 2323 | 1369 | 976 | 686 | 456 | 351 | 251 | 186 | 149 | 490 | 1041 | 833 | 625 | 849 | 731 | 424 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | on | on | on | on | on | cross-off | glassy | glassy | cross-off | on | cross-on | cross-on | on | cross-off | cross-on | glassy | on | cross-on |
High Tide | 9:12PM0.80m | 9:13AM1.31m | 9:48PM0.84m | 9:50AM1.37m | 10:21PM0.88m | 10:24AM1.41m | 10:53PM0.91m | 10:57AM1.43m | 11:25PM0.94m | 11:29AM1.41m | 11:58PM0.97m | 12:00PM1.37m | 00:31AM1.01m | |||||||
Low Tide | 3:27PM0.26m | 2:31AM0.34m | 4:03PM0.20m | 3:11AM0.28m | 4:36PM0.16m | 3:48AM0.24m | 5:07PM0.12m | 4:23AM0.20m | 5:37PM0.10m | 4:58AM0.19m | 6:06PM0.10m | 5:34AM0.21m | 6:34PM0.12m | |||||||
 |  |  |  |  | |  |  | | | | | | |  | |  | | | | |
 | — | — | 7:41 | — | — | 7:41 | — | — | 7:39 | — | — | 7:39 | — | — | 7:39 | — | — | 7:37 | — | — |
 | 6:04 | — | — | 6:04 | — | — | 6:05 | — | — | 6:06 | — | — | 6:06 | — | — | 6:07 | — | — | 6:07 | — |
mm | — | 2 | 5 | 1 | — | — | — | — | — | — | — | — | — | — | 17 | 16 | 10 | — | — | 1 |
Temp °C | 17 | 16 | 14 | 14 | 14 | 14 | 15 | 13 | 14 | 15 | 15 | 16 | 16 | 15 | 13 | 13 | 14 | 15 | 15 | 14 |
Feels °C | 15 | 15 | 12 | 12 | 13 | 12 | 12 | 12 | 13 | 14 | 14 | 13 | 12 | 9 | 6 | 9 | 7 | 14 | 13 | 12 |
Swell 1 Height (m) Direction Period (s) | W 9 | W 8 | W 10 | W 14 | W 13 | W 12 | W 11 | W 12 | W 12 | W 11 | W 11 | WSW 12 | W 11 | W 10 | W 13 | W 12 | W 12 | W 11 | WSW 11 | W 10 |
| kJ | 160 | 142 | 546 | 1640 | 2323 | 1369 | 976 | 686 | 456 | 351 | 251 | 186 | 149 | 490 | 1041 | 833 | 625 | 849 | 731 | 424 |
Swell 2 Height (m) Direction Period (s) | WSW 13 | WSW 16 | WSW 15 | SSW 11 | — | — | — | SW 9 | SW 8 | SW 8 | SSW 8 | SSW 7 | SW 7 | WSW 17 | NNW 7 | — | NNW 7 | NNW 7 | WNW 7 | WSW 13 |
| kJ | 178 | 223 | 193 | 11 | — | — | — | 21 | 33 | 16 | 6 | 5 | 2 | 27 | 160 | — | 108 | 47 | 30 | 69 |
Swell 3 Height (m) Direction Period (s) | WSW 17 | W 13 | SSW 12 | NW 16 | — | — | — | — | WSW 15 | NW 15 | NW 15 | SW 15 | NW 10 | NW 13 | NW 8 | — | — | — | — | — |
| kJ | 166 | 81 | 29 | 10 | — | — | — | — | 43 | 8 | 8 | 9 | 4 | 7 | 93 | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | NNE 3 | — | — | — | — | — | — | — | — | — | — | NNW 3 | N 5 | — | NNW 7 | — | — | N 6 | — |
| kJ | — | 3 | — | — | — | — | — | — | — | — | — | — | 6 | 109 | — | 102 | — | — | 27 | — |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 1 | 1 | 58 | 20 | 1 | 1 | 20 | 0 | 0 | 0 | 0 | 20 | 13 | 58 | 115 | 1 | 58 | 0 | 20 | 1 |
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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