
Surf Forecasts:
Arpoador surf forecast from 9 Sep 2026:
- Best quality surf: Monday 14 Sep, 9AM (local time) - 5.5ft (1.7m), 10s period, SE swell with cross-offshore winds.
- Most powerful swell: Monday 14 Sep, 12AM (local time) - 6ft (1.8m), 10s period, SSE swell with 703 kJ wave energy.
- Next surfable swell (1★+): Wednesday 9 Sep, 9AM (local time) - 2.5ft (0.8m), 10s 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 Wednesday (Sep 09) at 9AM. The primary swell is predicted to be 0.8m and 10s period with a secondary swell of 0.9m and 7s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Arpoador in the next 16 days are 1.8m 10s and forecast to arrive on Monday (Sep 14) 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 0.6m 4s period and expected on Saturday (Sep 12) at 12AM.
| Wave Type | Time (-03) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 9AM (Wed 9th Sep) | 2.5ft (0.8m) 10s |
| Best Surf | 9AM (Mon 14th Sep) | 5.5ft (1.7m) 10s |
| Most Powerful | 12AM (Mon 14th Sep) | 6ft (1.8m) 10s |
Table - best surf conditions forecast for Arpoador over the next 16 days.
The Lowdown
Alright, I’m back in the water, and I'm looking at the next couple of weeks. Let’s get into it.
We’ve got a bit of a slow start, but things start to build around Friday. The real standout window is shaping up to be Monday the 14th and Tuesday the 15th, with some solid, clean energy rolling in. The water’s sitting at a touch warmer than normal for this time of year, 73°F, so it’s a little more comfortable than usual.
Let’s talk about the best on offer. Monday morning, the 14th, at Arpoador is the one to circle. We’ve got a clean 6ft swell from the southeast, with a period of 10 seconds, and the wind is light and cross-offshore. The combined energy is solid at 774 (moderate wave energy), and the conditions are looking very good. That’s a proper surf day. The afternoon cleans up even more – 6ft from the ESE, but the period drops to 8 seconds, so it’s a little more windswell-like, but still clean and very good. You’ll want to be out there.
Tuesday morning the 15th keeps the fun going with 5ft from the SE, clean cross-off wind, and good conditions. The afternoon goes downhill with a strong SW wind, so get your session in early.
Now, before that high point, we have Thursday the 10th afternoon looking promising. 3ft from the south, but with a nice 13-second period and a clean offshore NNE breeze at 9 mph. The energy is moderate (305), and it’s a good, clean option.
Friday the 11th morning is glassy, with a 4ft south swell at a very long 14 seconds. The energy is strong (525), and it’s dead calm. This is a groundswell, so it’ll be a bit more lined up but with longer waits between sets. The point at Arpoador should handle that nicely.
For the second week, the surfing gets a bit more ordinary. We see a drop in swell size, and the wind starts to misbehave more often. There’s a nice little window on Thursday the 17th morning with a clean 2ft, 14-second south swell, and cross-off wind. The energy is still moderate (377), so it’s worth a paddle if you’re keen. The 18th Friday morning is also glassy with 4ft of south swell at 13 seconds (662 energy), but the afternoon turns onshore.
After that, it’s mostly small and messy or onshore until the 23rd, which offers a small, clean 2ft south swell at 14 seconds, but with a moderate breeze making it less appealing.
Overall, the best bet is the 14th, with the 15th morning as a close second. Get on it.
Rusty
Short Range ForecastHeavy rain (total 33mm), heaviest during Thu night. Warm (max 26°C on Fri night, min 20°C on Wed afternoon). Wind will be generally light. | Days 4-6 Weather SummaryHeavy rain (total 75mm), heaviest during Mon night. Warm (max 24°C on Sat morning, min 18°C on Sun afternoon). Winds increasing (calm on Sat morning, fresh winds from the NNE by Mon night). | ||||||||||||||||||||
Wednesday 9 | Thursday 10 | Friday 11 | Saturday 12 | Sunday 13 | Monday 14 | Tuesday 15 | |||||||||||||||
AM | PM | 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 10 | S 10 | S 13 | S 12 | S 13 | S 16 | S 14 | S 13 | S 12 | S 12 | S 11 | S 6 | S 9 | S 11 | SSE 10 | SE 10 | ESE 8 | E 8 | SE 9 | SE 8 | S 11 |
Wave Graph | |||||||||||||||||||||
130 | 96 | 125 | 239 | 255 | 605 | 489 | 342 | 184 | 97 | 59 | 39 | 270 | 683 | 703 | 546 | 427 | 442 | 314 | 181 | 149 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | cross-on | off | cross | off | cross-on | glassy | cross-off | off | glassy | on | on | cross | cross-off | cross-off | cross-off | cross-off | cross-on | cross-off | cross-on | cross-on |
High Tide | 2:32PM1.13m | 1:30AM1.13m | 2:47PM1.15m | 2:16AM1.21m | 3:05PM1.15m | 2:54AM1.26m | 3:24PM1.14m | 3:27AM1.26m | 3:45PM1.11m | 3:58AM1.22m | 4:07PM1.06m | 4:29AM1.13m | 4:31PM1.00m | ||||||||
Low Tide | 8:37PM0.29m | 8:47AM-0.13m | 9:06PM0.23m | 9:20AM-0.10m | 9:31PM0.20m | 9:49AM-0.02m | 9:54PM0.18m | 10:15AM0.09m | 10:12PM0.18m | 10:36AM0.23m | 10:24PM0.20m | 10:44AM0.38m | 10:24PM0.24m | ||||||||
5:56 | — | — | 5:54 | — | — | 5:54 | — | — | 5:52 | — | — | 5:52 | — | — | 5:50 | — | — | 5:50 | — | — | |
— | 5:44 | — | — | 5:45 | — | — | 5:45 | — | — | 5:45 | — | — | 5:45 | — | — | 5:45 | — | — | 5:45 | — | |
mm | 2 | 6 | 5 | 2 | 1 | 14 | 2 | — | 1 | — | 2 | 3 | 2 | 5 | 16 | 12 | 6 | 29 | 2 | 2 | — |
Temp °C | 22 | 20 | 22 | 22 | 23 | 23 | 23 | 25 | 26 | 24 | 21 | 20 | 19 | 18 | 18 | 18 | 19 | 19 | 24 | 21 | 21 |
Feels °C | 23 | 21 | 25 | 24 | 25 | 26 | 26 | 26 | 29 | 27 | 20 | 20 | 18 | 17 | 16 | 20 | 19 | 21 | 25 | 20 | 20 |
Swell 1 Height (m) Direction Period (s) | ESE 7 | ESE 7 | ESE 7 | S 12 | S 13 | S 16 | S 14 | S 13 | S 12 | S 12 | S 11 | S 6 | S 9 | S 11 | SSE 10 | SE 10 | ESE 7 | ESE 8 | SE 9 | SE 8 | S 11 |
88 | 64 | 47 | 239 | 255 | 605 | 489 | 342 | 184 | 97 | 59 | 39 | 270 | 683 | 703 | 546 | 178 | 187 | 314 | 181 | 149 | |
Swell 2 Height (m) Direction Period (s) | S 10 | S 10 | S 13 | ESE 7 | ESE 7 | ESE 7 | ESE 7 | ESE 8 | SE 4 | ESE 8 | ESE 8 | S 11 | S 12 | ESE 9 | ESE 9 | S 13 | SSE 9 | SSE 10 | S 10 | S 11 | SE 8 |
130 | 96 | 125 | 44 | 43 | 21 | 29 | 33 | 4 | 19 | 28 | 37 | 98 | 7 | 7 | 28 | 177 | 177 | 89 | 39 | 64 | |
Swell 3 Height (m) Direction Period (s) | S 16 | S 15 | S 10 | SE 13 | SE 13 | E 7 | SE 13 | SE 12 | ESE 8 | SE 11 | — | SE 9 | ESE 8 | — | — | — | S 11 | S 10 | S 11 | SSE 10 | SE 10 |
5 | 17 | 67 | 7 | 7 | 28 | 7 | 6 | 21 | 5 | — | 19 | 7 | — | — | — | 64 | 77 | 22 | 56 | 23 | |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | E 8 | E 4 | WSW 2 | SW 4 | — | — | E 9 | ESE 8 | ESE 7 | ESE 8 | E 8 | — | SW 3 | SSW 5 |
— | — | — | — | — | — | — | 94 | 12 | 1 | 5 | — | — | 37 | 23 | 200 | 427 | 442 | — | 1 | 13 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 51 | 0 | 3 | 0 | 32 | 0 | 11 | 0 | 0 | 423 | 138 | 12 | 12 | 258 | 0 | 0 | 73 | 0 | 407 | 116 |
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.










