Arpoador Surf Break

Lat Long: 22.99° S 43.20° W

Arpoador Surf Forecast and Surf Report

Issued: 8 am 18 Aug 2026 (local time)

Forecast update in  hr  min

Today's Arpoador sea temperature is
22.7° C
1.2° 

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


Arpoador surf forecast from 18 Aug 2026:

  • Best quality surf: Tuesday 25 Aug, 12AM (local time) - 7ft (2.2m), 13s period, S swell with cross-offshore winds.
  • Most powerful swell: Tuesday 25 Aug, 12AM (local time) - 7ft (2.2m), 13s period, S swell with 1,657 kJ wave energy.
  • Next surfable swell (1★+): Tuesday 18 Aug, 6PM (local time) - 4ft (1.2m), 7s period with E swell.

Best Forecast Surf Conditions for Arpoador this week:

The surf forecast for Arpoador over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Tuesday (Aug 18) at 6PM. The primary swell is predicted to be 1.2m and 7s period with a secondary swell of 0.7m and 7s. Another secondary swell of 0.3m and 9s is also forecast. The wind is predicted to be cross-offshore as the swell arrives.

The most powerful waves expected at Arpoador in the next 16 days are 2.2m 13s and forecast to arrive on Tuesday (Aug 25) at 12AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 4s period and expected on Tuesday (Aug 25) at 12PM.

Wave TypeTime (-03) & Date Wave Height & Period
Next good surf (1 star+) 6PM (Tue 18th Aug)4ft (1.2m) 7s
Best Surf12AM (Tue 25th Aug)7ft (2.2m) 13s
Most Powerful12AM (Tue 25th Aug)7ft (2.2m) 13s

Table - best surf conditions forecast for Arpoador over the next 16 days.


The Lowdown

Alright, Rusty here. Let's have a look at what's on the table for the next couple of weeks.

Right off the bat, I gotta be honest with you – this forecast is a bit of a slow burn. We're looking at a lot of small, weak swell and tricky wind for most of the first week. The water is sitting at 73°F, which is a touch warmer than normal for this time of year, so at least it'll be pleasant to sit out there.

The first real chance of anything decent doesn't show up until Monday, the 24th of August. That's a long gap with just tiny, ordinary waves. On Monday afternoon, we start seeing a pulse of longer-period groundswell from the south, with swell heights around 5 ft and a period of 14 seconds. The combined energy will be moderate (833). The wind is a light cross-shore from the southeast, which is okay but not perfect. The surf will be a bit soft and the long period might make it a bit wonky on the beach break, but it's the first sign of some proper energy.

Tuesday, the 25th of August, is where we get the best window. The south swell is still running, bumping up to 6 ft with a solid 12-second period. The wave energy is strong (1091). The wind is a cross-offshore from the east-northeast, which should keep the faces clean. This is the standout for the whole period – it's a solid, punchy south swell with clean conditions. But heads up, at that size, it's going to be pushing into intermediate to expert territory. The break is Arpoador, and it's fairly exposed to the south swell.

After that, the swell drops back fast. By Wednesday the 26th and Thursday the 27th, we're back to small, clean but weak waves. The wind turns offshore from the north and northeast, making for some glassy mornings, but the swell is just too small to get excited about.

Looking further out, there's a sniff of something on the 1st of September, with a rising swell from the east-southeast at 6 ft, but the wind is onshore and choppy. It looks raw and messy. That one's a long way off and the confidence is low, so don't book your week off just yet.

So, to sum it up: the best bet is the morning of Tuesday, the 25th of August. Get on it early for the cleanest conditions and a solid south swell at Arpoador. The rest of the window is mostly small, clean but weak, or blown out.

Rusty.

Short Range Forecast

Mostly dry. Warm (max 29°C on Wed morning, min 22°C on Tue morning). Wind will be generally light.

Days 4-6 Weather Summary

Light rain (total 3mm), mostly falling on Sat morning. Warm (max 31°C on Fri morning, min 18°C on Sun night). Wind will be generally light.

Tuesday
18
Wednesday
19
Thursday
20
Friday
21
Saturday
22
Sunday
23
Monday
24
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
1
0
1
1
0
0
0
0
2
1
0
0
0
0
1
1
0
1
1
2
4
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.9
ESE
7
1.1
E
7
0.9
ESE
7
0.7
ESE
7
0.6
ESE
7
0.5
ESE
7
0.5
ESE
7
0.6
E
7
1.6
E
7
0.8
ESE
8
0.5
ESE
8
1.3
SSW
7
1
S
8
1.4
S
11
1.2
S
10
1.1
S
9
1
S
9
1.3
S
12
1.3
S
11
1.5
S
14
2.2
S
13
Wave Graph
Metric surfscale
Energy kJ
79
124
81
44
34
29
28
36
253
64
37
145
127
459
268
202
152
461
408
828
1657
Wind (km/h)
10
N
15
ESE
10
NNW
5
NNE
15
ESE
5
N
5
E
15
SE
10
NNE
15
NNW
25
SW
20
SW
20
SSW
20
SSW
10
SSW
5
ESE
15
SE
10
SE
10
SE
10
SE
10
ESE
Wind State
off
cross
cross-off
off
cross
glassy
glassy
cross
off
cross-off
on
cross-on
on
on
on
glassy
cross
cross
cross
cross
cross-off
High Tide
5:51PM0.92m
00:24AM0.41m
6:41AM0.93m
12:11PM0.59m
6:41PM0.84m
7:36AM0.83m
12:47PM0.67m
7:29PM0.77m
8:35AM0.75m
1:27PM0.73m
8:24PM0.72m
12:38PM0.78m
10:40PM0.72m
12:24PM0.86m
11:44PM0.83m
12:51PM0.94m
00:24AM0.95m
Low Tide
1:01PM0.48m
10:53PM0.40m
10:46AM0.58m
1:45PM0.58m
11:11PM0.42m
10:46AM0.64m
4:11PM0.64m
4:23AM0.43m
5:35PM0.57m
5:33AM0.32m
1:23PM0.78m
6:14PM0.48m
6:16AM0.21m
6:51PM0.41m
6:58AM0.12m
7:34PM0.34m
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
part cloud
rain showers
part cloud
rain showers
part cloud
part cloud
light rain
light rain
light rain
light rain
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:15
6:15
6:13
6:13
6:11
6:11
6:09
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:37
5:37
5:37
5:37
5:38
5:38
5:38
 mm
1
1
1
2
2
2
Temp °C
27
26
26
29
26
25
26
26
24
31
23
21
20
20
20
20
20
19
18
18
18
Feels °C
28
26
28
30
26
26
26
26
25
28
21
19
18
17
19
19
18
18
18
18
17
  • 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 Arpoador Surf forecast

The above surf forecast table for Arpoador provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Arpoador can be found by selecting the local surf guide option on the grey menu. Our Arpoador 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 (Arpoador) 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 Arpoador 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.

Arpoador is 14 km (9 miles) from the very large city of Niteroi. If you plan a holiday in Rio de Janeiro, look for hotels and other accommodation in Niteroi. Niteroi has rooms for a wide range of budgets as well as cheap car hire and transport links.

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