Surf Forecasts:
Arpoador surf forecast from 1 Sep 2026:
- Best quality surf: Thursday 3 Sep, 12AM (local time) - 4.5ft (1.4m), 9s period, S swell with glassy winds.
- Most powerful swell: Monday 7 Sep, 9AM (local time) - 8ft (2.5m), 11s period, S swell with 1,405 kJ wave energy.
- Next surfable swell (1★+): Tuesday 1 Sep, 3AM (local time) - 4.5ft (1.3m), 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 (Sep 01) at 3AM. The primary swell is predicted to be 1.3m and 7s period with a secondary swell of 0.4m and 5s. Another secondary swell of 0.4m and 8s 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 2.5m 11s and forecast to arrive on Monday (Sep 07) at 9AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.7m 7s period and expected on Wednesday (Sep 02) at 3AM.
| Wave Type | Time (-03) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 3AM (Tue 1st Sep) | 4.5ft (1.3m) 7s |
| Best Surf | 12AM (Thu 3rd Sep) | 4.5ft (1.4m) 9s |
| Most Powerful | 9AM (Mon 7th Sep) | 8ft (2.5m) 11s |
Table - best surf conditions forecast for Arpoador over the next 16 days.
The Lowdown
Alright, grab your board and wax – let’s talk about what’s cookin’ at Arpoador.
We’ve got a bit of a slow start here, with the first few days nothing to get excited about. The beginning of the month offers some small, weak swell and bumpy conditions, so you might as well leave the board at home until things start to tidy up. But hang tight, because the second week is where the magic looks to line up.
For the standout, all eyes are on Tuesday, September 8th. That morning and afternoon Arpoador gets a solid SSE groundswell rolling in at 6 ft to 6 ft (12-second period), and the wind is coming out of the east as a cross-offshore breeze. That keeps the waves clean, the energy is solid (energy readings around 1055 and 1109 – strong, but not crazy), and the swell direction is in the sweet spot from the optimum direction for this break. This is the pick of the whole 16-day window—great shape, good size, and glassy conditions. Just keep in mind it’s a consistent spot that *often* draws a crowd, so get there early.
Later in the period, on Sunday, September 13th, there’s another promising window. Early that morning we’ve got a clean 4 ft S swell with a long 12-second period, offshore wind from the north-northeast, and nearly glassy conditions. The energy is moderate at 585, the direction is right, and things look clean. That morning is definitely worth a paddle.
A couple of other days are worth a mention—like September 3rd morning with a clean 4 ft SSE swell and NE cross-offshore winds, and September 15th morning with glassy 4 ft S swell (energy 839)—but the August 8th and September 13th mornings are the real standouts.
For the rest of the second week, things get a bit more mixed up: onshore winds and bigger, less clean swell take over, so don’t expect the magic to last. September 14th, for example, gets a strong 8 ft pulse (energy over 1900) but the WSW winds make it messy and pretty much blown out.
Bottom line? The first few days are a right-off, the middle of the first week cleans up, and next week has the real gems. Watch for the crowds and the wind direction, because when Arpoador gets that SE groundswell and east or NE wind, it’s worth the paddle.
-Rusty
Short Range ForecastHeavy rain (total 30mm), heaviest during Tue night. Warm (max 24°C on Tue morning, min 16°C on Wed night). Wind will be generally light. | Days 5-7 Weather SummaryModerate rain (total 17mm), heaviest on Sat afternoon. Warm (max 28°C on Fri afternoon, min 19°C on Sun afternoon). Winds increasing (calm on Fri morning, fresh winds from the SSE by Sun afternoon). | ||||||||||||||||||
Tuesday 1 | Wednesday 2 | Thursday 3 | Friday 4 | Saturday 5 | Sunday 6 | ||||||||||||||
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) | E 8 | ESE 8 | ESE 9 | SSW 7 | SW 7 | SSW 8 | S 9 | SSE 10 | SSE 11 | E 7 | SSE 11 | SSE 11 | SSE 10 | SSE 10 | SSE 10 | ESE 5 | SE 6 | S 9 | S 7 |
Wave Graph  | |||||||||||||||||||
 kJ | 97 | 67 | 61 | 88 | 194 | 276 | 313 | 349 | 427 | 263 | 173 | 135 | 62 | 41 | 20 | 21 | 24 | 153 | 214 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | cross-on | cross-on | cross-on | on | on | glassy | cross-off | cross-off | off | cross-off | cross | cross | cross-off | cross-on | cross-off | glassy | on | cross-on |
High Tide | 4:50AM1.17m | 5:09PM0.98m | 5:42AM1.05m | 5:52PM0.86m | 6:56AM0.94m | 12:10PM0.66m | 6:50PM0.76m | 8:03AM0.84m | 12:34PM0.80m | 7:44PM0.69m | 1:04PM0.91m | 8:57PM0.65m | 1:40PM1.00m | 11:32PM0.75m | |||||
Low Tide | 10:29PM0.32m | 11:02AM0.34m | 10:31PM0.34m | 10:55AM0.50m | 1:04PM0.50m | 10:39PM0.37m | 10:42AM0.64m | 2:28PM0.62m | 10:56PM0.42m | 10:27AM0.76m | 5:22PM0.60m | 4:57AM0.36m | 6:07PM0.53m | 5:50AM0.20m | 6:45PM0.46m | ||||
 |  |  |  | | |  |  | | | | |  | | |  |  | | | |
 | — | 6:03 | — | — | 6:01 | — | — | 6:01 | — | — | 6:00 | — | — | 5:58 | — | — | 5:58 | — | — |
 | — | — | 5:42 | — | — | 5:42 | — | — | 5:43 | — | — | 5:43 | — | — | 5:43 | — | — | 5:43 | — |
mm | 1 | — | 1 | 26 | 2 | — | — | — | — | — | — | 1 | — | — | 5 | 6 | 2 | 3 | 11 |
Temp °C | 23 | 24 | 23 | 20 | 20 | 20 | 20 | 22 | 23 | 21 | 27 | 28 | 23 | 24 | 23 | 21 | 21 | 20 | 18 |
Feels °C | 26 | 24 | 24 | 19 | 19 | 18 | 20 | 21 | 21 | 21 | 29 | 29 | 25 | 25 | 22 | 23 | 24 | 21 | 15 |
Swell 1 Height (m) Direction Period (s) | SE 4 | ESE 8 | ESE 9 | SSW 7 | SSW 7 | S 8 | S 9 | SSE 10 | SSE 11 | SSE 11 | SSE 11 | SSE 11 | SSE 10 | SSE 10 | SSE 10 | ESE 5 | SE 6 | S 9 | S 7 |
| kJ | 4 | 67 | 61 | 88 | 108 | 163 | 313 | 349 | 427 | 263 | 173 | 135 | 62 | 41 | 20 | 21 | 24 | 122 | 214 |
Swell 2 Height (m) Direction Period (s) | SE 8 | S 8 | SSE 8 | ESE 9 | ESE 8 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 6 | ESE 7 | ESE 8 | ESE 8 | ESE 9 | ESE 8 | SSE 5 | S 9 | S 14 | S 13 |
| kJ | 16 | 19 | 19 | 30 | 14 | 7 | 8 | 7 | 7 | 66 | 42 | 35 | 39 | 25 | 14 | 20 | 15 | 64 | 29 |
Swell 3 Height (m) Direction Period (s) | S 6 | — | — | SSE 7 | — | — | — | — | — | — | S 12 | S 11 | S 10 | SSW 4 | S 9 | SSE 10 | S 16 | ESE 8 | ESE 8 |
| kJ | 6 | — | — | 5 | — | — | — | — | — | — | 3 | 2 | 2 | 1 | 2 | 19 | 19 | 6 | 6 |
Wind waves Height (m) Direction Period (s) | E 8 | — | SW 3 | — | SW 7 | SSW 8 | — | — | ESE 4 | E 7 | — | — | SW 2 | — | SE 4 | — | — | S 9 | SE 6 |
| kJ | 97 | — | 2 | — | 194 | 276 | — | — | 16 | 263 | — | — | 1 | — | 13 | — | — | 153 | 56 |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 0 | 32 | 32 | 32 | 119 | 116 | 0 | 0 | 12 | 0 | 0 | 12 | 3 | 0 | 132 | 0 | 0 | 51 | 156 |
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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