Maresias Surf Break

Lat Long: 23.81° S 45.54° W

Maresias 48 hour detailed Surf Forecast

Issued: 8 am 18 Aug 2026 (local time)

Forecast update in  hr  min

Today's Maresias sea temperature is
21.2° C
1.0° 

Maresias surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.


How big are the waves at Maresias today (18 Aug):

  • Morning surf: Morning surf (18 Aug, local time) - 1.5ft (0.4m), 10s period with SSE swell.
  • Afternoon surf: Afternoon surf (18 Aug, local time) - 1ft (0.3m), 9s period with SSE swell.
  • Evening surf: Evening surf (18 Aug, local time) - 0.5ft (0.2m), 11s period with S swell.

The current surf forecast for Maresias at 2PM is: 0.3m 9s primary swell from a South-southeast direction (forecast issued at 08:00am August 18). An open ocean swell of 1.2m 8s is not directed at the surf break. The wind direction is predicted to be cross-onshore.

Time (-03) & DateWave HeightWave Period
Morning (18 Aug)1.5ft (0.4m)10s
Afternoon (18 Aug)1ft (0.3m)9s
Evening (18 Aug)0.5ft (0.2m)11s

Table - waves today at Maresias. (Swell directed towards the surf break)


Short Range Forecast

Mostly dry. Warm (max 32°C on Wed morning, min 18°C on Wed night). Wind will be generally light.

Tuesday
18
Wednesday
19
Thursday
20
6 AM
9 AM
12 PM
3 PM
6 PM
9 PM
12 AM
3 AM
6 AM
9 AM
12 PM
3 PM
6 PM
9 PM
12 AM
3 AM
6 AM
9 AM
12 PM
3 PM
6 PM
9 PM
Rating
(10 max)
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.4
SSE
10
0.4
SSE
10
0.3
SSE
10
0.3
SSE
9
0.2
S
11
0.2
S
11
0.2
S
9
0.2
S
10
0.2
S
10
0.1
S
10
0.1
SE
13
0.1
SE
13
0.1
SE
13
0.1
SE
13
0.1
SE
13
0.1
SE
13
0.1
SE
12
0.1
SE
12
0.2
S
12
0.3
S
11
0.3
S
11
0.4
S
10
Wave Graph
Metric surfscale
Energy kJ
32
31
18
17
9
9
7
7
7
3
7
7
7
7
7
7
6
6
11
22
21
35
Wind (km/h)
10
NNE
5
NW
5
S
5
SE
10
NE
10
NNE
10
NNE
10
NNE
10
N
5
NNE
5
SSE
5
ESE
0
NW
5
WNW
10
WNW
10
WNW
5
N
5
SW
5
SSE
10
E
15
NE
15
NE
Wind State
off
glassy
glassy
cross-on
cross-off
off
off
off
off
glassy
cross-on
cross
glassy
cross-off
cross-off
cross-off
glassy
cross-on
glassy
cross
cross-off
cross-off
High Tide
5:11AM1.02m
5:13PM0.90m
5:49AM0.90m
5:37PM0.84m
6:38AM0.78m
6:05PM0.76m
Low Tide
11:31AM0.41m
11:27PM0.33m
11:47AM0.52m
00:09AM0.39m
11:11AM0.63m
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:26
6:24
6:24
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:45
5:45
5:46
 mm
Temp °C
21
27
29
29
24
24
25
24
24
29
32
31
24
21
20
18
19
21
26
26
23
23
Feels °C
21
28
30
30
26
24
24
23
23
29
32
31
26
22
21
19
20
22
27
27
23
22
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
Map placeholder
How to use the Wavefinder 

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