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Surf Forecasts:

Praia das Dunas surf break

Praia das Dunas surfForecast / Rio de Janeiro / Brazil

information circle12 Day Weather and Surf, issued 2 am Saturday 23 Aug 2025 -03
Forecast update in hr  min  s Forecast update imminent
Praia das Dunas surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Praia das Dunas sea temperature is
21.3° C
 (Which is slightly cooler than normal)

Best Forecast Surf Conditions for Praia das Dunas this week:

The surf forecast for Praia das Dunas over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Monday (Aug 25) at 12AM. The primary swell is predicted to be 0.9m and 8s period. The wind is predicted to be cross-offshore as the swell arrives.

The most powerful waves expected at Praia das Dunas in the next 12 days are 2.5m 8s and forecast to arrive on Saturday (Aug 23) at 6PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.5m 9s period and expected on Monday (Aug 25) at 6AM.

Wave TypeTime (-03) & Date Wave Height & Period
Next good surf (1 star+)12AM (Mon 25th Aug)3ft (0.9m) 8s
Best Surf12AM (Mon 25th Aug)3ft (0.9m) 8s
Most Powerful 6PM (Sat 23rd Aug)8ft (2.5m) 8s

Table - best surf conditions forecast for Praia das Dunas over the next 12 days.

Updates in  hr  min  s Forecast update imminent 
12 DaysHourly
Print Table

Short Range Forecast Mostly dry. Warm (max 25°C on Sat morning, min 20°C on Sat morning). Winds decreasing (strong winds from the NE on Sat afternoon, calm by Mon morning).

Days 3-6 Weather Summary Mostly dry. Warm (max 22°C on Tue morning, min 20°C on Tue night). Winds increasing (moderate winds from the NE on Tue morning, strong winds from the NE by Wed night).

Saturday
23
Sunday
24
Monday
25
Tuesday
26
Wednesday
27
Thursday
28
Friday
29
AMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNight
Rating
(10 max)
0
0
0
0
0
1
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Swell
Height Map
See all maps
Wave Height (m) & direction (?)
1.9
ENE
2.2
ENE
2
ENE
1.5
ENE
1.1
ENE
0.9
ENE
0.8
E
0.8
E
0.8
ENE
0.7
ENE
0.7
S
0.9
ENE
0.8
ENE
0.9
ENE
0.8
ENE
0.8
E
0.7
E
0.7
E
1.2
S
1.1
S
0.7
S
Period(s) (?)7788888888138888888111011
Wave
Graph
(?)Metric surfscale
Energy (?)376512451286173968884841042871017511293836393422485260
Wind
(km/h)
40
NE
45
ENE
35
NE
40
WSW
35
WSW
15
WNW
5
W
20
ESE
20
NE
20
NE
25
E
25
NE
30
NE
35
E
40
NE
20
NE
30
ENE
25
NE
35
NE
40
ENE
30
NE
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
onononcross-
off		cross-
off		cross-
off		glasscrossononcross-
on		ononcross-
on		ononcross-
on		ononcross-
on		on
High Tide
/ height (m)
3:06PM
1.05
2:38AM
1.11
3:27PM
1.03
3:09AM
1.13
3:48PM
1.00
3:39AM
1.11
4:08PM
0.97
4:10AM
1.06
4:28PM
0.93
4:43AM
0.98
4:50PM
0.88
5:20AM
0.90
5:14PM
0.82
Low Tide
/ height (m)
8:58PM
0.28
9:19AM
-0.02
9:25PM
0.26
9:49AM
0.04
9:52PM
0.24
10:18AM
0.11
10:19PM
0.24
10:47AM
0.20
10:49PM
0.24
11:17AM
0.30
11:23PM
0.27
11:54AM
0.40
12:07AM
0.31
Saturday
23
Sunday
24
Monday
25
Tuesday
26
Wednesday
27
Thursday
28
Friday
29
Sunrise6:07--6:05--6:05--6:03--6:03--6:01--6:01--
Sunset-5:34--5:35--5:35--5:35--5:36--5:36--5:36-
clear
clear
clear
clear
clear
clear
part cloud
clear
part cloud
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
part cloud
thunderstorm
part cloud
Rain (mm)
-------------------2-
Temp. °C252421212121232222222221222221222221232221
Feels °C (?)201816171720232122212019181817201919201818
  • 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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Eyeball surf reportRecent Eyeball Surf Reports for Rio de Janeiro

  1. weather stationWind Update Wind reports 69 km away suggest it is still onshore at Praia das Dunas (moderate winds from the NE at Macae Airport). 2.1m 6s windswell from the ENE to make surfable waves.

    2 hours 3 minutes ago Praia das Dunas
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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 Praia das Dunas 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.

View detailed surf forecast for Praia das Dunas at:
surf-forecast.com

Information about the Praia das Dunas Surf forecast

The above surf forecast table for Praia das Dunas provides essential information for determining whether the surfing conditions will be good over the next 12 days. A general guide to surfing at Praia das Dunas can be found by selecting the local surf guide option on the grey menu. Our Praia das Dunas 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 (Praia das Dunas) 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 Praia das Dunas 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.

Praia das Dunas is 5 km (3 miles) from Cabo Frio. If you plan a holiday in Rio de Janeiro, look for hotels and other accommodation in Cabo Frio. Cabo Frio has rooms for a wide range of budgets as well as car hire and transport links.

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