
Surf Forecasts:
Arpoador surf forecast from 3 Sep 2026:
- Best quality surf: Friday 4 Sep, 12AM (local time) - 4ft (1.2m), 12s period, SSE swell with offshore winds.
- Most powerful swell: Monday 7 Sep, 12PM (local time) - 8ft (2.4m), 9s period, SSW swell with 919 kJ wave energy.
- Next surfable swell (1★+): Thursday 3 Sep, 6AM (local time) - 5ft (1.6m), 11s period with S 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 Thursday (Sep 03) at 6AM. The primary swell is predicted to be 1.6m and 11s period with a secondary swell of 0.2m and 9s. 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 9s and forecast to arrive on Monday (Sep 07) at 12PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.2m 6s period and expected on Thursday (Sep 03) at 9PM.
| Wave Type | Time (-03) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6AM (Thu 3rd Sep) | 5ft (1.6m) 11s |
| Best Surf | 12AM (Fri 4th Sep) | 4ft (1.2m) 12s |
| Most Powerful | 12PM (Mon 7th Sep) | 8ft (2.4m) 9s |
Table - best surf conditions forecast for Arpoador over the next 16 days.
The Lowdown
Alright, Rusty here, let’s take a look at what’s coming up for us over the next couple of weeks in feet and miles per hour.
We’ve got a bit of a mixed bag on the horizon, but there’s definitely some good stuff to get excited about, especially if you’re willing to be patient. The waves will start off pretty average and then build into some real standouts later on.
We kick things off on Thursday morning, the 3rd of September, at Arpoador. It’s not the best we’ll see, but there’s a clean 5 ft S swell rolling in with a nice 11-second period. The combined energy is moderate at 659. The wind is light and cross-off from the NE at 6 mph, so it’s clean and rideable for beginners. Don’t expect perfection, but it’s a solid enough start. The water temp is about average for this time of year.
Thursday afternoon the wind picks up from the E at 12 mph, making it a bit bumpy. The swell drops a touch, and the quality goes down. Not worth rushing out for.
Friday the 4th sees a drop in size to 3 ft SSE, still with a clean morning session thanks to light NNW winds at 6 mph. Energy is down to 271, so it’s fun smaller stuff but nothing special. By afternoon, the onshore wind ruins it.
Saturday the 5th and Sunday the 6th are pretty poor. The swell drops right off to tiny 2 ft and 1 ft over the weekend, with onshore winds and rain. The energy is weak, hitting just 77 on Saturday morning. Not worth paddling out.
Monday the 7th is also messy. There's 5 ft to 6 ft S swell, but the short period (8 to 10 seconds) and onshore winds mean it’s choppy and ugly. The energy is strong at 562 and 553, but the quality is low.
Tuesday the 8th offers a bit of a breather. The morning looks good: 4 ft S swell with an 11-second period, clean with cross-off winds from the ENE at 6 mph. Energy is moderate at 427. It’s surfable and clean, but not a standout.
Now, here’s the real deal. Thursday the 10th of September is a true standout. Morning and afternoon both look excellent. We’ve got 7 ft E swell, period of 8 seconds, and clean offshore winds from the NE and NNE at 6 mph. The energy is strong at 956. The waves will be punchy and clean. Arpoador will be breaking well. Keep in mind, this size is too big for beginners—this is one for the experienced crew. The crowds are likely because it’s a classic spot, so get there early.
Friday the 11th offers a nice transition: glassy conditions in the morning with a light 3 ft ESE swell. The period is 9 seconds, and the energy is low at 187. It’s a small, clean morning session for the longboard or a fun fish.
The following week, things start to look interesting again. On Monday the 14th of September, we get a lovely long-period groundswell. The morning has 4 ft S swell with a 15-second period, and the afternoon bumps up to 3 ft S swell with a 16-second period. The energy is substantial—632 in the morning and 725 in the afternoon. The wind is light and cross-off from the NE at 6 mph, keeping it clean. This groundswell is really well suited for a point or reef, and with that long period, the sets will line up nicely. Again, not for beginners.
Tuesday the 15th and Wednesday the 16th are more average, with onshore winds and lower quality, but the morning of Wednesday the 16th has clean 3 ft S swell with a 13-second period and moderate offshore winds from the NNE at 12 mph. It’s clean and rideable.
Thursday the 17th of September is another beauty and one of the best bets. The morning is glassy calm with a clean 4 ft S swell, 11-second period, and energy at 371. The winds are glass, so the waves will be clean and lined up. This is a fantastic morning for intermediate surfers. The crowds are likely.
Overall, the two standouts are Thursday the 10th of September for the bigger, punchy 7 ft E swell with clean offshore winds, and Thursday the 17th of September for the glassy, clean 4 ft S swell. Mark your calendar for those.
Rusty.
Short Range ForecastLight rain (total 6mm), mostly falling on Fri night. Warm (max 27°C on Fri morning, min 18°C on Wed night). Wind will be generally light. | Days 5-7 Weather SummaryHeavy rain (total 50mm), heaviest during Mon morning. Warm (max 21°C on Sat night, min 17°C on Sun night). Wind will be generally light. | ||||||||||||||||||
Thursday 3 | Friday 4 | Saturday 5 | Sunday 6 | Monday 7 | Tuesday 8 | ||||||||||||||
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) | S 11 | S 11 | SSE 12 | SSE 12 | SSE 11 | SSE 11 | SSE 10 | SSE 10 | SSE 10 | S 10 | S 9 | S 8 | S 7 | S 8 | S 10 | S 10 | S 11 | S 11 | S 11 |
Wave Graph | |||||||||||||||||||
507 | 652 | 647 | 411 | 225 | 138 | 86 | 59 | 34 | 18 | 110 | 387 | 212 | 356 | 546 | 512 | 335 | 323 | 381 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | cross-off | cross-off | off | cross-off | cross-on | cross-on | cross-off | cross-on | on | cross-on | cross-on | cross-on | cross | cross-on | cross-off | cross-off | cross-off | cross-off |
High Tide | 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 | 2:08PM1.06m | 00:08AM0.89m | 2:22PM1.11m | 00:46AM1.02m | |||||
Low Tide | 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 | 6:34AM0.07m | 7:23PM0.41m | 7:19AM-0.03m | 8:03PM0.35m | |||||
— | 6:01 | — | — | 6:00 | — | — | 5:58 | — | — | 5:58 | — | — | 5:56 | — | — | 5:56 | — | — | |
— | — | 5:43 | — | — | 5:43 | — | — | 5:43 | — | — | 5:43 | — | — | 5:44 | — | — | 5:44 | — | |
mm | — | — | — | — | — | — | 4 | — | 2 | 5 | 3 | 5 | 8 | 7 | 6 | 9 | 3 | 4 | 4 |
Temp °C | 21 | 22 | 23 | 21 | 27 | 27 | 21 | 22 | 23 | 21 | 21 | 19 | 18 | 17 | 17 | 18 | 18 | 18 | 18 |
Feels °C | 22 | 21 | 21 | 21 | 29 | 27 | 21 | 24 | 24 | 23 | 23 | 17 | 17 | 17 | 16 | 17 | 18 | 17 | 16 |
Swell 1 Height (m) Direction Period (s) | S 11 | S 11 | SSE 12 | SSE 12 | SSE 11 | SSE 11 | SSE 10 | SSE 10 | SSE 10 | SE 4 | S 9 | S 8 | S 7 | S 8 | S 10 | S 10 | S 11 | S 11 | S 11 |
507 | 652 | 647 | 411 | 225 | 138 | 86 | 59 | 34 | 4 | 110 | 186 | 212 | 88 | 546 | 512 | 335 | 323 | 381 | |
Swell 2 Height (m) Direction Period (s) | ESE 9 | ESE 8 | ESE 8 | ESE 6 | ESE 7 | ESE 8 | ESE 8 | ESE 8 | ESE 9 | SSW 6 | ESE 8 | ESE 8 | S 13 | SE 6 | — | SE 9 | SSE 14 | S 13 | S 16 |
15 | 7 | 7 | 80 | 43 | 37 | 24 | 14 | 15 | 7 | 13 | 13 | 28 | 54 | — | 3 | 63 | 84 | 5 | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | S 12 | S 11 | SW 4 | SSW 4 | SSE 4 | S 10 | ESE 4 | S 14 | E 8 | S 11 | S 19 | ESE 8 | SSW 12 | SSW 11 | S 16 |
— | — | — | — | 3 | 2 | 4 | 4 | 3 | 18 | 4 | 16 | 29 | 64 | 7 | 7 | 29 | 24 | 5 | |
Wind waves Height (m) Direction Period (s) | — | — | ESE 4 | E 7 | — | — | — | — | SE 4 | — | — | S 8 | — | S 8 | — | — | — | — | E 4 |
— | — | 14 | 240 | — | — | — | — | 4 | — | — | 387 | — | 356 | — | — | — | — | 15 | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 0 | 0 | 12 | 0 | 0 | 51 | 3 | 0 | 107 | 32 | 127 | 719 | 156 | 12 | 116 | 0 | 0 | 11 | 26 |
Best forecast wave conditions in Rio de Janeiro | |||||||||||||||||||
Best forecast wave conditions in Brazil | |||||||||||||||||||
Header Global | |||||||||||||||||||
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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.










