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Surf Forecasts:
Isla Negra surfForecast / Santiago / Chile
12 Day Weather and Surf, issued 8 pm Friday 17 Oct 2025 -04
Best Forecast Surf Conditions for Isla Negra this week:
The surf forecast for Isla Negra over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Monday (Oct 20) at 6AM. The primary swell is predicted to be 0.2m and 21s period. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Isla Negra in the next 12 days are 0.7m 18s and forecast to arrive on Wednesday (Oct 22) at 12PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 3.0m 14s period and expected on Friday (Oct 24) at 6PM.
| Wave Type | Time (-04) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6AM (Mon 20th Oct) | 0.5ft (0.2m) 21s |
| Best Surf | 9AM (Wed 22nd Oct) | 2ft (0.6m) 18s |
| Most Powerful | 12PM (Wed 22nd Oct) | 2.5ft (0.7m) 18s |
Table - best surf conditions forecast for Isla Negra over the next 12 days.
Short Range Forecast Mostly dry. Very mild (max 16°C on Sat morning, min 10°C on Sun night). Wind will be generally light. | Days 3-6 Weather Summary Mostly dry. Very mild (max 16°C on Wed morning, min 11°C on Wed night). Wind will be generally light. | |||||||||||||||||||||
Saturday 18 | Sunday 19 | Monday 20 | Tuesday 21 | Wednesday 22 | Thursday 23 | Fri 24 | ||||||||||||||||
| Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | ||
Rating (10 max) | ||||||||||||||||||||||
Swell Height Map | ||||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||
| Period(s) (?) | 15 | 15 | 12 | 12 | 13 | 13 | 13 | 21 | 12 | 11 | 19 | 19 | 19 | 18 | 18 | 18 | 17 | 16 | 16 | 16 | 16 | |
Wave (?)Graph  | ||||||||||||||||||||||
 kJ (?) | 33 | 8 | 14 | 15 | 27 | 27 | 17 | 90 | 14 | 78 | 148 | 74 | 74 | 209 | 209 | 123 | 170 | 173 | 173 | 147 | 226 | |
Wind (km/h) | ||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- off | cross- off | cross | cross- off | cross | cross | off | off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | |
High Tide / height (m) | 9:22PM 1.05 | 9:20AM 1.23 | 9:55PM 1.15 | 9:58AM 1.21 | 10:24PM 1.23 | 10:32AM 1.18 | 10:51PM 1.29 | 11:05AM 1.13 | 11:19PM 1.34 | 11:38AM 1.07 | 11:48PM 1.36 | 12:11PM 1.00 | 12:19AM 1.35 | 12:45PM 0.93 | ||||||||
Low Tide / height (m) | 3:09AM 0.26 | 3:41PM 0.11 | 3:51AM 0.20 | 4:09PM 0.11 | 4:30AM 0.16 | 4:35PM 0.12 | 5:06AM 0.13 | 5:00PM 0.15 | 5:42AM 0.13 | 5:26PM 0.19 | 6:18AM 0.14 | 5:52PM 0.23 | 6:56AM 0.18 | |||||||||
Saturday 18 | Sunday 19 | Monday 20 | Tuesday 21 | Wednesday 22 | Thursday 23 | Fri 24 | ||||||||||||||||
| Sunrise | - | 7:01 | - | - | 7:01 | - | - | 7:00 | - | - | 6:58 | - | - | 6:56 | - | - | 6:56 | - | - | 6:54 | - | |
| Sunset | - | - | 8:00 | - | - | 8:01 | - | - | 8:02 | - | - | 8:04 | - | - | 8:05 | - | - | 8:05 | - | - | 8:06 | |
 |  | |  | |  | | | | |  | | | | | | | | | | | ||
Rain (mm) | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | |
| Temp. °C | 14 | 16 | 15 | 13 | 14 | 14 | 11 | 15 | 15 | 13 | 15 | 14 | 13 | 16 | 15 | 11 | 14 | 13 | 11 | 13 | 13 | |
| Feels °C (?) | 11 | 13 | 13 | 13 | 12 | 12 | 10 | 11 | 11 | 9 | 12 | 10 | 9 | 12 | 11 | 8 | 10 | 9 | 8 | 9 | 8 | |
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Recent Eyeball Surf Reports for Santiago
Continuing clean conditions at Isla Negra (calm at Santo Domingo Airport 22 km from Isla Negra). 0.1m 15s groundswell from the NW with a 0.1m 13s groundswell, also from the NW. 2 swells combining to make bigger set waves.
22 km away, 2 h 21 min ago
FREE! Surf-Forecast.com widget for your website
The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Isla Negra surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.
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 12 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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