Isla Negra surfForecast / Santiago / Chile

information circle12 Day Weather and Surf, issued 8 pm Tuesday 09 Dec 2025 -04
Forecast update in hr  min  s Forecast update imminent
Isla Negra surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Isla Negra sea temperature is
16.9° C
(Which is 1.3°C warmer than normal for this time of year)


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 Wednesday (Dec 10) at 6AM. The primary swell is predicted to be 1.0m and 17s period. The wind is predicted to be glassy as the swell arrives.

The most powerful waves expected at Isla Negra in the next 12 days are 1.1m 16s and forecast to arrive on Thursday (Dec 11) at 3AM. Winds are predicted to be glassy at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 2.5m 8s period and expected on Monday (Dec 15) at 6PM.

Wave TypeTime (-04) & Date Wave Height & Period
Next good surf (1 star+) 6AM (Wed 10th Dec)3.5ft (1.0m) 17s
Best Surf 6AM (Wed 10th Dec)3.5ft (1.0m) 17s
Most Powerful 3AM (Thu 11th Dec)3.5ft (1.1m) 16s

Table - best surf conditions forecast for Isla Negra over the next 12 days.

Updates in  hr  min  s Forecast update imminent

Short Range Forecast Mostly dry. Very mild (max 17°C on Wed morning, min 14°C on Tue night). Wind will be generally light.

Days 3-6 Weather Summary Mostly dry. Very mild (max 17°C on Sat morning, min 12°C on Sun night). Winds increasing (light winds from the S on Sat morning, strong winds from the SSW by Mon afternoon).

Wednesday
10
Thursday
11
Friday
12
Saturday
13
Sunday
14
Monday
15
Tue
16
NightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPM
Rating
(10 max)
3
2
0
3
2
0
2
2
1
2
1
0
1
0
0
0
0
0
0
0
0
Swell
Height Map
Wave Height (m) & direction (?)
0.9
WNW
1
WNW
1
WNW
1
WNW
1
WNW
0.9
WNW
0.8
WNW
0.8
WNW
0.8
WNW
0.7
WNW
0.5
WNW
0.5
WNW
0.4
WNW
0.4
WNW
0.4
NW
0.4
NW
0.2
WNW
0.3
WNW
0.4
NW
0.3
WNW
0.3
WNW
Period(s) (?)181616161616151414141413131313131616151414
Wave
Graph
(?)Metric surfscale
Energy kJ (?)547512499493475348249239239183108102686744422548544141
Wind
(km/h)
5
S
5
WSW
15
W
0
SSE
5
WSW
20
WNW
5
SSW
10
SW
20
SW
15
SSW
10
S
25
SW
15
SSW
20
SSW
25
SW
20
S
20
S
40
SW
20
SSW
20
S
25
SW
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
cross-
off
crosscross-
on
glasscrosscross-
on
glasscross-
off
cross-
off
cross-
off
cross-
off
cross-
off
cross-
off
cross-
off
cross-
off
cross-
off
offcross-
off
cross-
off
cross-
off
cross-
off
High Tide
/ height (m)
3:03AM
1.38
4:06PM
0.87
4:00AM
1.25
5:14PM
0.90
5:00AM
1.12
6:21PM
0.96
6:03AM
1.01
7:19PM
1.03
7:08AM
0.93
8:08PM
1.11
8:09AM
0.88
8:49PM
1.19
9:03AM
0.86
Low Tide
/ height (m)
10:05AM
0.13
9:29PM
0.38
11:00AM
0.18
10:46PM
0.44
11:53AM
0.22
12:09AM
0.47
12:42PM
0.25
1:27AM
0.45
1:27PM
0.28
2:31AM
0.40
2:07PM
0.30
3:24AM
0.33
2:46PM
0.30
Wednesday
10
Thursday
11
Friday
12
Saturday
13
Sunday
14
Monday
15
Tue
16
Sunrise-6:28--6:30--6:30--6:30--6:30--6:31--6:31-
Sunset--8:47--8:49--8:50--8:51--8:51--8:52--8:52
clear
clear
clear
part cloud
part cloud
part cloud
part cloud
part cloud
part cloud
clear
part cloud
cloud
part cloud
clear
clear
clear
clear
clear
clear
clear
clear
Rain (mm)
---------------------
Temp. °C161717161717151616151717151515141717162019
Feels °C (?)161615171514141413131412131099119131514
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
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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 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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