Isla Negra surfForecast / Santiago / Chile

information circle12 Day Weather and Surf, issued 2 pm Saturday 13 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
17.1° C
(Which is 1.2°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 Monday (Dec 15) at 9AM. The primary swell is predicted to be 0.4m and 16s 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 0.8m 16s and forecast to arrive on Saturday (Dec 20) at 6AM. Winds are predicted to be offshore 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+) 9AM (Mon 15th Dec)1.5ft (0.4m) 16s
Best Surf12AM (Fri 19th Dec)2ft (0.6m) 17s
Most Powerful 6AM (Sat 20th Dec)2.5ft (0.8m) 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 18°C on Tue morning, min 13°C on Sat night). Mainly strong winds.

Days 3-6 Weather Summary Mostly dry. Very mild (max 19°C on Wed afternoon, min 14°C on Tue night). Mainly fresh winds.

Sat
13
Sunday
14
Monday
15
Tuesday
16
Wednesday
17
Thursday
18
Friday
19
PMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAM
Rating
(10 max)
0
0
0
0
0
1
0
0
0
0
0
0
0
1
1
0
2
2
0
2
2
Swell
Height Map
Wave Height (m) & direction (?)
0.5
WNW
0.4
WNW
0.4
WNW
0.4
NW
0.4
NW
0.4
NW
0.3
WNW
0.4
NW
0.3
WNW
0.2
WNW
0.2
WNW
0.2
WNW
0.2
WNW
0.2
WNW
0.2
WNW
0.4
NW
0.6
WNW
0.6
WNW
0.5
NW
0.6
NW
0.8
WNW
Period(s) (?)131313131316161514141413181819171717161616
Wave
Graph
(?)Metric surfscale
Energy kJ (?)102686744426448544120181731333770200202132203318
Wind
(km/h)
20
WSW
15
SSW
20
SSW
25
SW
25
SSW
15
S
35
SW
20
S
20
SSW
25
SW
5
SW
15
NNW
30
NNW
0
S
5
W
15
W
10
S
10
S
20
SW
10
S
10
SSW
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
cross-
off
cross-
off
cross-
off
cross-
off
cross-
off
offcross-
off
cross-
off
cross-
off
cross-
off
cross-
off
ononglassglasscross-
on
cross-
off
cross-
off
cross-
off
cross-
off
cross-
off
High Tide
/ height (m)
7:19PM
1.03
7:08AM
0.93
8:08PM
1.11
8:09AM
0.88
8:49PM
1.19
9:03AM
0.86
9:26PM
1.26
9:50AM
0.86
10:02PM
1.32
10:32AM
0.86
10:38PM
1.36
11:11AM
0.86
11:14PM
1.39
11:48AM
0.86
Low Tide
/ height (m)
1:27AM
0.45
1:27PM
0.28
2:31AM
0.40
2:07PM
0.30
3:24AM
0.33
2:46PM
0.30
4:08AM
0.27
3:23PM
0.30
4:48AM
0.22
3:59PM
0.29
5:26AM
0.18
4:35PM
0.28
6:04AM
0.16
Sat
13
Sunday
14
Monday
15
Tuesday
16
Wednesday
17
Thursday
18
Friday
19
Sunrise--6:30--6:31--6:31--6:31--6:31--6:31--6:31
Sunset8:51--8:51--8:52--8:52--8:52--8:53--8:53--
part cloud
cloud
cloud
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
Rain (mm)
---------------------
Temp. °C171515161417171618181518191617171517181518
Feels °C (?)14121111811101314141413151616151314151416
  • 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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