Surf Forecasts:
Praia Grande surf forecast from 31 Aug 2026:
- Best quality surf: Thursday 3 Sep, 3AM (local time) - 5ft (1.6m), 10s period, S swell with cross-offshore winds.
- Most powerful swell: Thursday 3 Sep, 12PM (local time) - 5.5ft (1.7m), 11s period, SSE swell with 711 kJ wave energy.
- Next surfable swell (1★+): Monday 31 Aug, 12PM (local time) - 1.5ft (0.5m), 8s period with E swell.
Best Forecast Surf Conditions for Praia Grande this week:
The surf forecast for Praia Grande over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Monday (Aug 31) at 12PM. The primary swell is predicted to be 0.5m and 8s period. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Praia Grande in the next 16 days are 1.7m 11s and forecast to arrive on Thursday (Sep 03) at 12PM. Winds are predicted to be offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.9m 8s period and expected on Tuesday (Sep 01) at 6AM.
| Wave Type | Time (-03) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 12PM (Mon 31st Aug) | 1.5ft (0.5m) 8s |
| Best Surf | 3AM (Thu 3rd Sep) | 5ft (1.6m) 10s |
| Most Powerful | 12PM (Thu 3rd Sep) | 5.5ft (1.7m) 11s |
Table - best surf conditions forecast for Praia Grande over the next 16 days.
The Lowdown
Alright, let's get into it. The name's Rusty, and I'm looking at the next couple of weeks for Praia Grande.
Right now, we're in a bit of a flat spell. The first few days are a write-off, with tiny, messy waves and iffy winds. Monday the 31st is glassy but the swell is barely a ripple at 2 feet, and Tuesday and Wednesday don't get any better. You're better off waiting.
The first real pulse of energy arrives on Thursday, September 3rd. The morning is the standout. We've got a clean 6 foot swell from the south with a solid 11-second period – that's proper groundswell energy (760). The wind is blowing offshore from the NE, and it's clear skies. This is the best session of the early window. The afternoon is still surfable with offshore winds, but the wind picks up strong, making it harder to paddle. The water temp is sitting at 73°, which is pretty average for this time of year.
Friday the 4th and Saturday the 5th have some knee-high leftovers, but the energy is fading. The winds are offshore, so it's clean, but the swell is small and ordinary. Sunday the 6th is a non-starter.
Then the ocean wakes up again. On Monday, September 7th, a big, raw south swell hits, but it's blown out by onshore winds. The swell is 6 to 6 feet, but with strong onshore winds, it's just a mess. Not worth it.
The next real window opens on Tuesday, September 8th. We're looking at a solid 7 to 8 foot south swell with a 12-second period. That's a lot of energy (up to 1599). The wind is cross-offshore, so it'll be clean, but this is big. At over 8 feet, this is only for experienced surfers. The conditions are a bit marginal, but if you're an expert, that morning session could be a goer.
Wednesday the 9th through Friday the 11th keep the swell running, but it's a battle against strong offshore winds that are hard to paddle into. The swell stays around 5 to 7 feet, but getting out the back will be a workout.
Looking further out, Saturday, September 12th, brings a glassy morning with 5 foot swell from the east. That's a nice, clean option for a weekend session, though the energy is dropping. Sunday the 13th morning is also glassy, with a smaller 3 foot east swell. Clean and fun for a log if you're keen.
The very end of the run, Tuesday, September 15th, has a small, clean 2 foot south swell with a long 13-second period. It's a sneaky good session for a longboard, but the energy is low. For the best of the best, lock in the morning of Thursday, September 3rd. It's the whole package.
Rusty.
Short Range ForecastModerate rain (total 16mm), heaviest on Tue night. Warm (max 23°C on Tue morning, min 19°C on Tue night). Winds increasing (calm on Mon morning, strong winds from the WSW by Tue night). | Days 4-6 Weather SummaryModerate rain (total 12mm), heaviest on Sat night. Warm (max 24°C on Fri afternoon, min 19°C on Thu morning). Winds decreasing (near gales from the NE on Thu night, calm by Fri night). | ||||||||||||||||||||
Monday 31 | Tuesday 1 | Wednesday 2 | Thursday 3 | Friday 4 | Saturday 5 | Sunday 6 | |||||||||||||||
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) | E 8 | ESE 8 | SSW 6 | SSW 8 | WSW 5 | WSW 6 | SW 6 | SW 7 | S 10 | S 11 | S 11 | SSE 11 | SSE 11 | SSE 11 | SSE 10 | SSE 10 | E 8 | S 5 | SSE 6 | SSW 9 | S 12 |
Wave Graph  | |||||||||||||||||||||
 kJ | 33 | 24 | 7 | 13 | 33 | 49 | 89 | 168 | 128 | 670 | 617 | 439 | 270 | 164 | 90 | 57 | 95 | 34 | 50 | 28 | 99 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | cross-off | cross-off | cross-on | cross-on | on | on | cross-on | cross-on | off | off | cross-off | cross-off | off | on | cross-off | off | cross-off | off | cross-off | cross-off |
High Tide | 4:18PM0.97m | 4:30AM1.06m | 4:45PM0.90m | 5:13AM0.98m | 5:15PM0.82m | 6:11AM0.87m | 5:50PM0.73m | 8:21AM0.78m | 6:45PM0.65m | 11:44AM0.86m | 10:45PM0.64m | 12:37PM0.96m | 11:52PM0.75m | ||||||||
Low Tide | 10:39AM0.11m | 10:44PM0.21m | 11:20AM0.23m | 11:23PM0.25m | 12:10PM0.36m | 00:14AM0.29m | 1:23PM0.49m | 1:32AM0.33m | 3:16PM0.56m | 3:19AM0.32m | 5:12PM0.54m | 4:53AM0.24m | 6:15PM0.48m | ||||||||
 |  |  |  | |  |  | | | | | | | |  | | |  | | | | |
 | 6:00 | — | — | 5:58 | — | — | 5:58 | — | — | 5:56 | — | — | 5:56 | — | — | 5:54 | — | — | 5:54 | — | — |
 | — | 5:37 | — | — | 5:37 | — | — | 5:37 | — | — | 5:37 | — | — | 5:37 | — | — | 5:38 | — | — | 5:38 | — |
mm | — | — | — | — | — | 15 | 1 | — | — | — | — | — | — | — | 2 | — | 2 | 8 | 1 | 3 | 5 |
Temp °C | 21 | 22 | 22 | 23 | 21 | 22 | 20 | 20 | 20 | 20 | 20 | 20 | 23 | 24 | 22 | 22 | 23 | 21 | 22 | 22 | 21 |
Feels °C | 24 | 24 | 18 | 24 | 22 | 22 | 16 | 15 | 17 | 15 | 14 | 13 | 20 | 22 | 22 | 23 | 22 | 22 | 25 | 23 | 21 |
Swell 1 Height (m) Direction Period (s) | ENE 8 | ENE 8 | SSW 6 | SSW 8 | ENE 9 | ENE 8 | ENE 8 | ENE 8 | SSW 7 | S 11 | S 11 | SSE 11 | SSE 11 | SSE 11 | ENE 8 | ENE 8 | E 8 | ENE 8 | SSE 6 | SE 5 | SSW 8 |
| kJ | 102 | 77 | 7 | 13 | 281 | 154 | 120 | 94 | 114 | 670 | 617 | 439 | 270 | 164 | 143 | 101 | 95 | 77 | 50 | 27 | 76 |
Swell 2 Height (m) Direction Period (s) | E 8 | ESE 8 | S 8 | S 8 | S 8 | S 7 | SSE 9 | SE 9 | S 10 | E 8 | — | S 14 | S 12 | S 11 | SSE 10 | SSE 10 | SSE 10 | SE 9 | ENE 8 | ENE 8 | S 12 |
| kJ | 33 | 24 | 1 | 6 | 10 | 4 | 8 | 3 | 128 | 69 | — | 4 | 11 | 10 | 90 | 57 | 38 | 22 | 81 | 33 | 99 |
Swell 3 Height (m) Direction Period (s) | SW 4 | WSW 4 | S 9 | — | S 7 | S 9 | — | — | E 8 | SW 7 | — | — | — | — | SSW 10 | SW 3 | — | S 15 | SSW 14 | SSW 9 | SE 5 |
| kJ | 5 | 2 | 2 | — | 10 | 2 | — | — | 69 | 21 | — | — | — | — | 10 | 3 | — | 17 | 37 | 28 | 12 |
Wind waves Height (m) Direction Period (s) | — | — | ENE 7 | ENE 8 | WSW 5 | WSW 6 | SW 6 | SW 7 | — | — | E 8 | ENE 6 | ENE 7 | ENE 7 | SW 2 | — | ENE 7 | S 5 | — | — | — |
| kJ | — | — | 310 | 479 | 33 | 49 | 89 | 168 | — | — | 169 | 154 | 210 | 222 | 1 | — | 77 | 34 | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 5 | 11 | 120 | 10 | 5 | 120 | 302 | 807 | 5 | 0 | 271 | 57 | 23 | 0 | 149 | 0 | 11 | 19 | 0 | 28 | 19 |
Best forecast wave conditions in Rio de Janeiro | |||||||||||||||||||||
Best forecast wave conditions in Brazil | |||||||||||||||||||||
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Information about the Praia Grande Surf forecast
The above surf forecast table for Praia Grande provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Praia Grande can be found by selecting the local surf guide option on the grey menu. Our Praia Grande 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 (Praia Grande) 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 Praia Grande 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.
Praia Grande is 3 km (2 miles) from the city of Arraial do Cabo. If you plan a holiday in Rio de Janeiro, look for hotels and other accommodation in Arraial do Cabo. Arraial do Cabo has rooms for a wide range of budgets as well as car hire and transport links.
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