Surf Forecasts:
Isla Negra surf forecast from 11 Jul 2026:
- Best quality surf: Monday 13 Jul, 8PM (local time) - 8ft (2.5m), 16s period, WSW swell with cross-offshore winds.
- Most powerful swell: Friday 17 Jul, 11PM (local time) - 13ft (4.0m), 10s period, NNW swell with 3,545 kJ wave energy.
- Next surfable swell (1★+): Saturday 11 Jul, 5AM (local time) - 3.5ft (1.1m), 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 Saturday (Jul 11) at 5AM. The primary swell is predicted to be 1.1m and 11s period. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Isla Negra in the next 16 days are 4.0m 10s and forecast to arrive on Friday (Jul 17) 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 1.4m 12s period and expected on Wednesday (Jul 15) at 8AM.
| Wave Type | Time (-04) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 5AM (Sat 11th Jul) | 3.5ft (1.1m) 11s |
| Best Surf | 8PM (Mon 13th Jul) | 8ft (2.5m) 16s |
| Most Powerful | 11PM (Fri 17th Jul) | 13ft (4.0m) 10s |
Table - best surf conditions forecast for Isla Negra over the next 16 days.
Listen up, this is Rusty.
Our only spot on the map for this period is Isla Negra, and it’s a reef that only the advanced crew should even look at. We start slow, it gets real good, and then it turns into a barren wasteland for the better part of a week and a half.
The one and only call you need to hear is Monday, July 13th and Tuesday, July 14th. Monday morning kicks off a 5ft west swell with a 18-second period. That’s deep, powerful groundswell, and the combined energy is a massive 1795. A light cross-off wind keeps it clean. That afternoon, it jumps to 8ft from the west-southwest with a 16-second period and energy at 2958. Tuesday follows with an 8ft west-southwest swell, a 13-second period, and energy at 2354. You’ve got light offshore winds from the south-southeast at 5 mph in the morning, making it nearly glassy. This is powerful, excellent surf, but anything over 8ft is for experts only. That long-period swell will wrap beautifully around the reef, giving you proper, lined-up waves. The water temp is pretty normal for the time of year, so you won’t need anything crazy for a wetsuit.
The appetizer comes on Saturday, July 11th, with a clean 4ft to 4ft west swell in the morning. It’s a nice, gentle day but nothing compared to what’s coming.
After Tuesday the 14th, it’s all over. From Wednesday the 15th onward, we get hammered by strong onshore winds, rain, and blown-out, messy waves for the rest of the run. There’s a brief window on Sunday, July 21st with clean offshore winds, but it’s a 2ft swell. Not worth your time.
Towards the end, Friday, July 24th afternoon throws up a 5ft north swell, and Saturday, July 25th morning goes glassy with a 5ft west swell. But the spot can get crowded, and the consistency isn’t there to call it a standout.
Bottom line: if you’re an expert, circle Monday, July 13th and Tuesday, July 14th. That’s the whole story. Everything else is a flat spell or a mess.
Rusty.
Short Range ForecastMostly dry. Very mild (max 17°C on Sat afternoon, min 13°C on Sun night). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Very mild (max 17°C on Wed afternoon, min 13°C on Mon night). Winds increasing (calm on Tue night, fresh winds from the N by Thu afternoon). | ||||||||||||||||||||
Saturday 11 | Sunday 12 | Monday 13 | Tuesday 14 | Wednesday 15 | Thursday 16 | Fri 17 | |||||||||||||||
Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | |
Swell Height Map |  |  |  |  |  |  |  |  | |||||||||||||
Wave Height (m) Direction Period (s) | W 11 | W 10 | WSW 10 | WSW 10 | W 9 | W 9 | W 9 | W 18 | WSW 16 | WSW 14 | WSW 13 | WSW 12 | WSW 12 | W 11 | W 10 | W 9 | WSW 10 | NNW 6 | NNW 9 | NW 10 | NW 10 |
Wave Graph  | |||||||||||||||||||||
 kJ | 338 | 260 | 263 | 201 | 81 | 56 | 56 | 1740 | 2907 | 3339 | 2354 | 1788 | 1114 | 189 | 125 | 180 | 333 | 196 | 1850 | 1768 | 2667 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | cross-off | cross-off | off | cross-off | cross-off | cross-off | cross-off | cross-off | off | off | cross-off | glassy | glassy | on | on | cross-on | cross-on | cross-on | cross-on | cross-on |
High Tide | 7:21AM1.33m | 7:55PM0.84m | 8:19AM1.46m | 8:58PM0.87m | 9:13AM1.56m | 9:53PM0.91m | 10:05AM1.64m | 10:44PM0.96m | 10:54AM1.66m | 11:32PM0.99m | 11:41AM1.63m | 00:19AM1.02m | 12:27PM1.55m | ||||||||
Low Tide | 00:29AM0.28m | 2:16PM0.23m | 1:30AM0.24m | 3:14PM0.12m | 2:28AM0.18m | 4:06PM0.02m | 3:22AM0.12m | 4:55PM-0.04m | 4:14AM0.08m | 5:41PM-0.06m | 5:05AM0.07m | 6:25PM-0.05m | 5:55AM0.10m | 7:08PM-0.01m | |||||||
 |  | | | |  | | | | |  | |  | | | | | | |  |  | |
 | — | 7:48 | — | — | 7:48 | — | — | 7:48 | — | — | 7:48 | — | — | 7:48 | — | — | 7:48 | — | — | 7:47 | — |
 | 5:53 | — | 5:53 | — | — | 5:54 | — | — | 5:55 | — | — | 5:55 | — | — | 5:57 | — | — | 5:57 | — | — | 5:58 |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 3 | 41 |
Temp °C | 16 | 16 | 17 | 15 | 17 | 17 | 14 | 15 | 15 | 13 | 15 | 15 | 15 | 16 | 17 | 14 | 15 | 15 | 15 | 15 | 13 |
Feels °C | 15 | 13 | 13 | 13 | 15 | 14 | 12 | 13 | 12 | 12 | 14 | 12 | 14 | 15 | 15 | 13 | 9 | 8 | 7 | 5 | 1 |
Swell 1 Height (m) Direction Period (s) | W 11 | W 10 | SW 14 | WSW 10 | SW 13 | SW 14 | SW 13 | W 18 | WSW 16 | WSW 14 | WSW 13 | WSW 12 | WSW 12 | SW 12 | SW 11 | W 9 | WSW 10 | W 9 | SW 15 | NW 10 | SW 14 |
| kJ | 338 | 260 | 284 | 201 | 178 | 191 | 138 | 1740 | 2907 | 3339 | 2354 | 1788 | 1114 | 343 | 171 | 180 | 333 | 169 | 83 | 1768 | 149 |
Swell 2 Height (m) Direction Period (s) | SW 13 | SW 14 | W 16 | SW 13 | W 9 | W 9 | W 9 | W 9 | SW 13 | — | — | — | WNW 14 | W 11 | W 10 | SW 11 | W 9 | SW 11 | SW 11 | SW 14 | W 15 |
| kJ | 199 | 268 | 5 | 212 | 81 | 56 | 56 | 55 | 108 | — | — | — | 20 | 189 | 125 | 80 | 6 | 76 | 30 | 167 | 17 |
Swell 3 Height (m) Direction Period (s) | — | NW 12 | N 12 | W 16 | SW 6 | NW 11 | W 23 | SW 13 | — | — | — | — | — | NW 14 | NW 14 | W 10 | WNW 13 | SW 16 | — | — | — |
| kJ | — | 6 | 3 | 5 | 15 | 5 | 43 | 138 | — | — | — | — | — | 8 | 7 | 8 | 17 | 42 | — | — | — |
Wind waves Height (m) Direction Period (s) | — | — | WSW 10 | — | — | SW 5 | SW 5 | — | W 8 | — | — | — | — | N 2 | NNW 3 | — | N 4 | NNW 6 | NNW 9 | — | NW 10 |
| kJ | — | — | 263 | — | — | 11 | 11 | — | 51 | — | — | — | — | 1 | 3 | — | 16 | 196 | 1850 | — | 2667 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 115 | 1 | 97 | 376 | 70 | 1278 | 808 |
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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