Surf Forecasts:
Arpoador surf forecast from 17 Aug 2026:
- Best quality surf: Monday 17 Aug, 6AM (local time) - 5.5ft (1.7m), 7s period, E swell with offshore winds.
- Most powerful swell: Monday 24 Aug, 3AM (local time) - 8ft (2.4m), 12s period, SSW swell with 1,487 kJ wave energy.
- Next surfable swell (1★+): Monday 17 Aug, 6AM (local time) - 5.5ft (1.7m), 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 Monday (Aug 17) at 6AM. The primary swell is predicted to be 1.7m and 7s period with a secondary swell of 1.2m and 7s. Another secondary swell of 0.8m and 11s is also forecast. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Arpoador in the next 16 days are 2.4m 12s and forecast to arrive on Monday (Aug 24) at 3AM. Winds are predicted to be onshore at the time the swell arrives.
| Wave Type | Time (-03) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6AM (Mon 17th Aug) | 5.5ft (1.7m) 7s |
| Best Surf | 6AM (Mon 17th Aug) | 5.5ft (1.7m) 7s |
| Most Powerful | 3AM (Mon 24th Aug) | 8ft (2.4m) 12s |
Table - best surf conditions forecast for Arpoador over the next 16 days.
The Lowdown
Alright, Rusty here. Let's have a look at the Arpoador forecast.
First up, the overall pattern is a bit of a slow burn. We've got a little window of small, clean waves midweek, but the real juice comes late next week with a solid South groundswell. The water temp is about average for the time of year, nothing unusual there.
We kick off on Monday the 17th. Morning looks alright with a clean 5.2ft cross-off wind from the East, but the period is short at 7 seconds, so it'll be a bit crumbly. Afternoon drops off to 4.3ft and gets messy. Tuesday the 18th morning is tiny at 3ft, but super clean with a light offshore from the NNE. Not worth rushing out for, but if you're a beginner at Arpoador, it's a gentle, forgiving wave (533 combined energy). The rest of the week up to Friday the 21st is mostly small and forgettable, with the odd clean window on Thursday the 20th morning (2.3ft) and a bit of a bump on Saturday the 22nd afternoon with a 4.3ft South swell, but it's onshore and choppy.
Now, the standout window. It starts brewing on Monday the 24th with a building S swell, but that day is rain and onshore wind. Tuesday the 25th is the real prize. Clean, offshore cross-off winds from the East and ENE all day with a solid 6.2ft to 5.2ft South groundswell rolling in at a juicy 12-second period. The wave energy is strong (1054 on Tuesday morning). This is the pick of the forecast for Arpoador. That swell hangs around through Wednesday the 26th, still clean and smaller at 3.6ft, but with that same long period making for lined-up sets. Perfect for a beginner-friendly bank. Keep in mind, the long period South swell can break a bit straight at Arpoador's beach, but the clean wind will make it fun.
After that, it tapers off into small, clean conditions on the 30th and 31st with some glassy mornings and a little 2.3ft to 3.6ft bump. A nice way to end the run. There's a gap of a few days of poor surf after the big swell, but the end of the month offers a clean, small option for the longboard.
So the best bet is Tuesday the 25th and Wednesday the 26th at Arpoador. That 6.2ft South swell with clean offshore winds will be the session to aim for. Crowds are likely, so get there early.
Short Range ForecastMostly dry. Warm (max 28°C on Wed morning, min 19°C on Sun night). Wind will be generally light. | Days 5-7 Weather SummaryLight rain (total 2mm), mostly falling on Fri night. Warm (max 30°C on Thu morning, min 19°C on Fri night). Wind will be generally light. | ||||||||||||||||||
Monday 17 | Tuesday 18 | Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | ||||||||||||||
Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Swell Height Map |  |  |  |  |  |  |  | ||||||||||||
Wave Height (m) Direction Period (s) | ESE 7 | E 7 | ESE 7 | E 7 | ESE 7 | E 7 | ESE 7 | ESE 7 | ESE 7 | ESE 8 | ESE 7 | ESE 7 | E 7 | ESE 8 | ESE 8 | SSW 5 | S 7 | S 11 | S 10 |
Wave Graph  | |||||||||||||||||||
 kJ | 254 | 264 | 166 | 429 | 72 | 124 | 108 | 61 | 47 | 39 | 48 | 52 | 392 | 64 | 35 | 46 | 88 | 389 | 184 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | cross-off | cross-off | off | cross | off | off | cross | off | off | cross | off | cross | on | cross-on | cross-on | cross-on | cross |
High Tide | 4:53AM1.16m | 5:13PM1.00m | 5:39AM1.05m | 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 | |||
Low Tide | 11:04PM0.38m | 12:03PM0.36m | 10:59PM0.39m | 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 | ||||
 |  | | | | | | | | | | | | | |  |  |  |  | |
 | — | 6:16 | — | — | 6:15 | — | — | 6:15 | — | — | 6:13 | — | — | 6:13 | — | — | 6:11 | — | — |
 | — | — | 5:37 | — | — | 5:37 | — | — | 5:37 | — | — | 5:37 | — | — | 5:37 | — | — | 5:38 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 2 | — | — | — |
Temp °C | 19 | 24 | 25 | 22 | 27 | 26 | 26 | 28 | 26 | 26 | 30 | 28 | 26 | 29 | 22 | 20 | 20 | 20 | 20 |
Feels °C | 18 | 24 | 24 | 22 | 28 | 25 | 27 | 27 | 25 | 27 | 30 | 27 | 26 | 26 | 20 | 19 | 20 | 19 | 20 |
Swell 1 Height (m) Direction Period (s) | ESE 7 | ESE 7 | ESE 7 | ESE 7 | ESE 7 | ESE 7 | ESE 7 | ESE 7 | ESE 7 | ESE 8 | ESE 7 | ESE 7 | ESE 7 | ESE 8 | ESE 8 | SSW 6 | S 7 | S 11 | S 10 |
| kJ | 202 | 108 | 120 | 153 | 72 | 57 | 108 | 61 | 47 | 39 | 48 | 46 | 153 | 64 | 35 | 31 | 88 | 389 | 184 |
Swell 2 Height (m) Direction Period (s) | S 11 | SSE 11 | S 11 | S 10 | SSE 10 | SSE 10 | S 11 | S 10 | SE 13 | SE 13 | SE 12 | S 12 | S 11 | S 10 | S 9 | ESE 8 | S 12 | ESE 7 | ESE 7 |
| kJ | 151 | 156 | 112 | 55 | 33 | 18 | 2 | 2 | 7 | 6 | 6 | 12 | 21 | 17 | 15 | 21 | 27 | 5 | 5 |
Swell 3 Height (m) Direction Period (s) | SE 12 | SE 12 | SE 11 | — | SE 9 | E 13 | SE 8 | SE 13 | S 10 | S 10 | S 10 | S 9 | SW 8 | S 16 | S 16 | S 9 | ESE 8 | — | S 16 |
| kJ | 6 | 5 | 5 | — | 3 | 3 | 3 | 7 | 2 | 2 | 2 | 2 | 3 | 5 | 5 | 6 | 11 | — | 5 |
Wind waves Height (m) Direction Period (s) | ESE 7 | E 7 | ESE 7 | E 7 | — | E 7 | — | — | — | — | — | ESE 7 | E 7 | — | SW 3 | SSW 5 | — | — | — |
| kJ | 254 | 264 | 166 | 429 | — | 124 | — | — | — | — | — | 52 | 392 | — | 5 | 46 | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 0 | 0 | 12 | 0 | 0 | 12 | 0 | 0 | 51 | 6 | 0 | 26 | 0 | 3 | 119 | 119 | 26 | 119 | 12 |
Best forecast wave conditions in Rio de Janeiro | |||||||||||||||||||
Best forecast wave conditions in Brazil | |||||||||||||||||||
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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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