Surf Forecasts:
Arpoador surf forecast from 13 Aug 2026:
- Best quality surf: Thursday 13 Aug, 6PM (local time) - 6ft (1.9m), 15s period, S swell with glassy winds.
- Most powerful swell: Saturday 15 Aug, 3AM (local time) - 6.5ft (2.0m), 14s period, S swell with 1,531 kJ wave energy.
- Next surfable swell (1★+): Thursday 13 Aug, 6PM (local time) - 6ft (1.9m), 15s 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 (Aug 13) at 6PM. The primary swell is predicted to be 1.9m and 15s period with a secondary swell of 0.4m and 6s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Arpoador in the next 16 days are 2.0m 14s and forecast to arrive on Saturday (Aug 15) at 3AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.7m 4s period and expected on Saturday (Aug 15) at 3AM.
| Wave Type | Time (-03) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6PM (Thu 13th Aug) | 6ft (1.9m) 15s |
| Best Surf | 6PM (Thu 13th Aug) | 6ft (1.9m) 15s |
| Most Powerful | 3AM (Sat 15th Aug) | 6.5ft (2.0m) 14s |
Table - best surf conditions forecast for Arpoador over the next 16 days.
The Lowdown
Right, let’s break it down for Arpoador. This is a beginner-friendly spot that loves a southerly to south-easterly swell, and we’ve got a good run of it coming. The water’s sitting at 74°, which is way warmer than normal for August – a nice surprise.
The first good surf is on Thursday morning, August 13th. We’ve got a 6ft south swell at 13 seconds, moderate energy (936). The wind is light offshore from the north at 3 mph, keeping the surface glassy. This is a proper standout session.
Friday the 14th is smaller at 5ft, still from the south, but the wind goes cross-onshore. Not the pick.
Saturday the 15th morning is the big one. A solid 7ft SSE swell, 13-second period, strong energy (1344). Wind is a gentle cross-off from the east at 9 mph, but at this size, it’s better for experienced surfers. Beginners take note: over 5ft can be a handful.
Sunday the 16th has a 6ft east swell but with a short 7-second period, so it’ll be weak and a bit messy. Get the morning session before the wind picks up to 16 mph later.
Monday the 17th is clean with a 7ft east swell, 8-second period, and light offshore winds from the NE at 6 mph. That’s a great, clean morning for all levels.
Tuesday the 18th drops to 3ft – surfable but nothing special. Wednesday the 19th is flat and choppy. A two-day lull, but it’ll pass.
Things turn back on Thursday the 20th morning with a clean 5ft ESE swell. Light offshore winds. A good return for the beginners.
After a messy Friday and small Saturday, we get a cracking long-range call. Tuesday the 25th morning: a strong 6ft southerly swell, 14-second period, moderate-strong energy (1199), with light cross-off winds. That’s a beauty.
Thursday the 27th is the real long-range standout. Glassy conditions, a 5ft SSE groundswell at 15 seconds. That period is very long, so it’ll have plenty of push. Energy is strong (1375). Perfect for the experienced crew, but watch the tide.
Friday the 28th ends the run on a high note with a clean 6ft ESE swell and light offshore winds.
Your best bets are Thursday the 13th, Saturday the 15th, and the long-range calls on Tuesday the 25th and Thursday the 27th. Crowds are a factor here often, so plan for an early paddle.
Rusty.
Short Range ForecastLight rain (total 5mm), mostly falling on Sat morning. Warm (max 24°C on Sun morning, min 19°C on Sat night). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Warm (max 30°C on Wed morning, min 19°C on Sun night). Wind will be generally light. | |||||||||||||||||||
Thu 13 | Friday 14 | Saturday 15 | Sunday 16 | Monday 17 | Tuesday 18 | Wednesday 19 | ||||||||||||||
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 14 | S 14 | S 13 | S 13 | S 14 | SSE 13 | SSE 13 | S 12 | E 7 | ESE 7 | E 8 | E 8 | ESE 8 | E 8 | E 8 | E 8 | E 8 | ESE 7 | ESE 7 | E 7 |
Wave Graph  | ||||||||||||||||||||
 kJ | 1334 | 1443 | 1006 | 796 | 1362 | 1452 | 1175 | 416 | 422 | 207 | 671 | 409 | 202 | 553 | 368 | 228 | 248 | 62 | 51 | 200 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | on | cross-on | on | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | off | cross-off | off | off | cross | off | off | cross-off | off |
High Tide | 3:41PM1.20m | 3:15AM1.26m | 4:01PM1.18m | 3:47AM1.28m | 4:22PM1.13m | 4:18AM1.25m | 4:46PM1.07m | 4:53AM1.16m | 5:13PM1.00m | 5:39AM1.05m | 5:51PM0.92m | 00:24AM0.41m | 6:41AM0.93m | 12:11PM0.59m | 6:41PM0.84m | |||||
Low Tide | 10:02PM0.34m | 10:15AM-0.05m | 10:26PM0.35m | 10:45AM0.06m | 10:47PM0.37m | 11:17AM0.21m | 11:04PM0.38m | 12:03PM0.36m | 10:59PM0.39m | 1:01PM0.48m | 10:53PM0.40m | 10:46AM0.58m | 1:45PM0.58m | 11:11PM0.42m | ||||||
 |  |  | |  |  | |  |  | |  | | | | | | | | | | |
 | — | — | 6:18 | — | — | 6:18 | — | — | 6:16 | — | — | 6:16 | — | — | 6:15 | — | — | 6:15 | — | — |
 | 5:36 | — | — | 5:36 | — | — | 5:36 | — | — | 5:37 | — | — | 5:37 | — | — | 5:37 | — | — | 5:37 | — |
mm | — | — | — | — | 1 | 2 | 1 | 1 | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 22 | 23 | 22 | 22 | 21 | 20 | 20 | 20 | 24 | 24 | 20 | 25 | 27 | 25 | 29 | 28 | 27 | 30 | 28 | 28 |
Feels °C | 23 | 25 | 24 | 24 | 22 | 20 | 20 | 19 | 24 | 22 | 20 | 26 | 27 | 25 | 30 | 28 | 28 | 30 | 27 | 29 |
Swell 1 Height (m) Direction Period (s) | S 14 | S 14 | S 13 | S 13 | S 14 | SSE 13 | SSE 13 | SE 7 | SE 7 | S 11 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 7 | ESE 7 | ESE 7 |
| kJ | 1334 | 1443 | 1006 | 796 | 1362 | 1452 | 1175 | 188 | 176 | 157 | 271 | 158 | 142 | 238 | 110 | 83 | 99 | 62 | 47 | 70 |
Swell 2 Height (m) Direction Period (s) | E 6 | — | E 8 | E 9 | E 9 | ESE 10 | — | S 12 | S 12 | SE 12 | S 11 | S 11 | S 11 | S 10 | S 10 | S 10 | S 9 | S 10 | S 10 | S 10 |
| kJ | 11 | — | 6 | 6 | 6 | 9 | — | 416 | 220 | 6 | 119 | 85 | 83 | 54 | 18 | 17 | 7 | 7 | 8 | 2 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | SE 13 | ESE 12 | — | SE 12 | — | — | S 12 | — | S 12 | S 11 | S 14 | SE 13 | SE 13 |
| kJ | — | — | — | — | — | — | — | 6 | 15 | — | 6 | — | — | 25 | — | 3 | 2 | 4 | 7 | 6 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | E 11 | ESE 7 | E 7 | ESE 7 | E 8 | E 8 | ESE 8 | E 8 | E 8 | E 8 | E 8 | — | E 7 | E 7 |
| kJ | — | — | — | — | — | — | 37 | 197 | 422 | 207 | 671 | 409 | 202 | 553 | 368 | 228 | 248 | — | 51 | 200 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 51 | 116 | 116 | 119 | 0 | 11 | 0 | 11 | 0 | 156 | 0 | 0 | 0 | 0 | 0 | 12 | 0 | 0 | 0 | 0 |
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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