
Surf Forecasts:
Isla Negra surf forecast from 20 Oct 2026:
- Best quality surf: Sunday 25 Oct, 12AM (local time) - 4.5ft (1.3m), 13s period, WSW swell with glassy winds.
- Most powerful swell: Wednesday 21 Oct, 12AM (local time) - 8ft (2.5m), 8s period, NNW swell with 728 kJ wave energy.
- Next surfable swell (1★+): Friday 23 Oct, 9PM (local time) - 1.5ft (0.4m), 15s period with NW 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 Friday (Oct 23) at 9PM. The primary swell is predicted to be 0.4m and 15s period with a secondary swell of 0.6m and 6s. 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 2.5m 8s and forecast to arrive on Wednesday (Oct 21) at 12AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.5m 16s period and expected on Tuesday (Oct 20) at 3AM.
| Wave Type | Time (-04) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 9PM (Fri 23rd Oct) | 1.5ft (0.4m) 15s |
| Best Surf | 12AM (Sun 25th Oct) | 4.5ft (1.3m) 13s |
| Most Powerful | 12AM (Wed 21st Oct) | 8ft (2.5m) 8s |
Table - best surf conditions forecast for Isla Negra over the next 16 days.
Short Range ForecastModerate rain (total 12mm), heaviest on Tue night. Very mild (max 19°C on Tue morning, min 15°C on Mon night). Winds increasing (calm on Mon night, fresh winds from the N by Tue night). | Days 5-7 Weather SummaryLight rain (total 7mm), mostly falling on Thu night. Very mild (max 16°C on Sun afternoon, min 12°C on Fri night). Wind will be generally light. | ||||||||||||||||||
Tuesday 20 | Wednesday 21 | Thursday 22 | Friday 23 | Saturday 24 | Sunday 25 | ||||||||||||||
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) | NW 13 | NW 18 | NNW 7 | NNW 8 | NNW 8 | NW 8 | NW 8 | NW 7 | NW 6 | WNW 16 | NW 16 | NW 16 | WNW 6 | WSW 7 | NW 14 | WSW 13 | NW 14 | NW 13 | NW 13 |
Wave Graph | |||||||||||||||||||
45 | 154 | 363 | 728 | 502 | 352 | 155 | 104 | 120 | 97 | 64 | 62 | 29 | 41 | 102 | 545 | 54 | 46 | 44 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | cross-on | on | cross-on | cross-on | on | cross-on | cross-on | on | on | cross-on | cross | off | cross | cross | glassy | off | cross | off |
High Tide | 6:47AM1.06m | 8:10PM0.81m | 7:41AM1.09m | 8:42PM0.91m | 8:25AM1.13m | 9:11PM1.03m | 9:05AM1.16m | 9:39PM1.15m | 9:43AM1.18m | 10:10PM1.28m | 10:22AM1.17m | 10:43PM1.39m | |||||||
Low Tide | 00:15AM0.55m | 1:58PM0.30m | 1:25AM0.49m | 2:31PM0.24m | 2:17AM0.41m | 2:59PM0.19m | 3:01AM0.31m | 3:26PM0.14m | 3:42AM0.22m | 3:53PM0.11m | 4:23AM0.13m | 4:23PM0.09m | |||||||
— | 7:00 | — | — | 6:58 | — | — | 6:56 | — | — | 6:56 | — | — | 6:54 | — | — | 6:54 | — | — | |
8:01 | — | 8:02 | — | — | 8:04 | — | — | 8:05 | — | — | 8:05 | — | — | 8:06 | — | — | 8:07 | — | |
mm | — | — | 5 | 7 | — | — | — | — | — | 6 | 1 | — | — | — | — | — | — | — | — |
Temp °C | 16 | 19 | 18 | 17 | 18 | 18 | 17 | 18 | 18 | 15 | 15 | 15 | 14 | 14 | 15 | 14 | 15 | 16 | 15 |
Feels °C | 15 | 13 | 12 | 12 | 14 | 15 | 16 | 13 | 14 | 13 | 13 | 12 | 12 | 13 | 12 | 13 | 12 | 14 | 15 |
Swell 1 Height (m) Direction Period (s) | SW 16 | SW 16 | SW 15 | SW 14 | SW 16 | NW 8 | NW 8 | SW 13 | SW 13 | SW 13 | SW 13 | SW 13 | SW 12 | SW 14 | SW 13 | WSW 13 | SW 13 | SW 14 | SW 13 |
1129 | 773 | 565 | 398 | 793 | 352 | 155 | 398 | 386 | 380 | 431 | 369 | 256 | 331 | 299 | 545 | 246 | 277 | 166 | |
Swell 2 Height (m) Direction Period (s) | NW 13 | NW 18 | WSW 9 | SW 18 | NW 16 | SW 15 | SW 14 | NW 16 | NW 16 | NW 6 | NW 6 | WNW 6 | WNW 6 | WSW 7 | W 7 | NW 14 | WSW 7 | W 7 | W 6 |
45 | 154 | 31 | 249 | 67 | 614 | 590 | 43 | 63 | 62 | 20 | 29 | 29 | 41 | 66 | 72 | 54 | 33 | 20 | |
Swell 3 Height (m) Direction Period (s) | WNW 18 | WSW 9 | SW 19 | W 13 | W 11 | WNW 16 | NW 17 | NW 12 | NW 12 | WNW 16 | NW 16 | NW 16 | SW 16 | WNW 6 | NW 14 | N 12 | NW 14 | NW 13 | NW 13 |
31 | 45 | 95 | 31 | 22 | 104 | 43 | 5 | 5 | 97 | 64 | 62 | 153 | 15 | 102 | 3 | 47 | 46 | 44 | |
Wind waves Height (m) Direction Period (s) | — | NNW 5 | NNW 7 | NNW 8 | NNW 8 | — | — | NW 7 | NW 6 | — | — | — | — | — | — | — | — | — | — |
— | 28 | 363 | 728 | 502 | — | — | 104 | 120 | — | — | — | — | — | — | — | — | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 1 | 82 | 1253 | 189 | 82 | 97 | 1 | 82 | 97 | 97 | 20 | 1479 | 6 | 1 | 425 | 0 | 0 | 425 | 0 |
Best forecast wave conditions in Santiago | |||||||||||||||||||
Best forecast wave conditions in Chile | |||||||||||||||||||
Header Global | |||||||||||||||||||
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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.










