Surf Forecasts:
Atlantida surf forecast from 12 Aug 2026:
- Best quality surf: Thursday 13 Aug, 12AM (local time) - 5.5ft (1.7m), 14s period, SSE swell with cross-offshore winds.
- Most powerful swell: Thursday 13 Aug, 9AM (local time) - 8ft (2.5m), 14s period, SSE swell with 2,323 kJ wave energy.
- Next surfable swell (1★+): Wednesday 12 Aug, 9PM (local time) - 5ft (1.6m), 12s period with SSE swell.
Best Forecast Surf Conditions for Atlantida this week:
The surf forecast for Atlantida over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Wednesday (Aug 12) at 9PM. The primary swell is predicted to be 1.6m and 12s period with a secondary swell of 0.7m and 5s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Atlantida in the next 16 days are 2.5m 14s and forecast to arrive on Thursday (Aug 13) at 9AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.6m 6s period and expected on Thursday (Aug 13) at 9AM.
| Wave Type | Time (-03) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 9PM (Wed 12th Aug) | 5ft (1.6m) 12s |
| Best Surf | 12AM (Thu 13th Aug) | 5.5ft (1.7m) 14s |
| Most Powerful | 9AM (Thu 13th Aug) | 8ft (2.5m) 14s |
Table - best surf conditions forecast for Atlantida over the next 16 days.
The Lowdown
Alright, let’s get into it.
The next 16 days are a mixed bag for Atlantida. Honestly, it’s gonna be a bit of a grind for a while before we see some real quality. The water temperature is sitting right around average for this time of year, so no surprises there.
We’re looking at a quiet start, with the first real surf window showing up on Wednesday morning, August 12th. That morning, a solid 5ft swell from the SSE is rolling in with a 12-second period and moderate wave energy (752). The wind is a light cross-offshore from the north, so the conditions are clean. It’s not huge, but it’s surfable and the best bet to kick things off. The afternoon gets a bit messy with a cross-shore wind, so Wednesday morning is the call.
Thursday morning, August 13th, is a no-go. That 8ft swell from the SSE comes with a strong 25 km/h cross-onshore wind, making it choppy and ugly. The energy spikes to (2323), but it’s not worth paddling out. The rest of that day and through to the weekend is pretty poor. Winds stay onshore or cross-onshore, and the swell is either too blown out or coming from a rubbish direction. Friday and Saturday are write-offs.
There’s a tiny chance of something on Sunday morning, August 16th, with a 6ft swell from the ENE, but the period is short (8 seconds) and the wind is cross-shore, so it’ll be lumpy and not much fun.
The next week doesn’t offer much until Thursday morning, August 20th. That morning is glassy, with the wind completely dead (0 km/h). The swell is small, just 3ft from the ENE with low energy (182). It’s surfable, but very ordinary. Not a standout.
The real highlight, the one to circle on your calendar, is Sunday morning, August 23rd. This is the best on offer. We’ve got a clean 6ft swell from the SSE, with an 11-second period and good energy (856). The wind is glassy – dead calm. The conditions will be beautiful, making for some clean, fun waves. This is the morning to get out there.
Then, looking further out, Monday afternoon, August 24th, is another excellent window. A 6ft swell from the SSE, with a very long 14-second period, generating strong energy (1327). The wind is glassy again. This is a serious groundswell, and at a beach setup like Atlantida, that long period might make the waves a bit too straight and dumpy in sections, but the power and cleanliness will be there for experienced surfers. Tuesday morning, August 25th, is also very good, with a 6ft SSE swell, clean cross-offshore wind, and strong energy (1119). A solid, punchy run of swell.
To sum it up: the first week is mostly a dud. The standout call is Sunday morning, August 23rd, with clean 6ft SSE swell and glassy conditions. Monday afternoon, August 24th, is also a top-tier session for the more experienced crew. After that, the energy fades out towards the end of the forecast period.
Keep your eyes on that Sunday and Monday – that’s where the magic is.
- Rusty
Short Range ForecastHeavy rain (total 63mm), heaviest during Thu morning. Very mild (max 17°C on Fri night, min 12°C on Wed morning). Winds increasing (light winds from the N on Wed night, fresh winds from the ENE by Fri night). | Days 4-6 Weather SummaryHeavy rain (total 20mm), heaviest during Sun morning. Warm (max 20°C on Mon morning, min 15°C on Mon night). Winds decreasing (fresh winds from the NE on Sun night, calm by Mon afternoon). | ||||||||||||||||||||
Wednesday 12 | Thursday 13 | Friday 14 | Saturday 15 | Sunday 16 | Monday 17 | Tuesday 18 | |||||||||||||||
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) | SSE 12 | SSE 12 | SSE 14 | SSE 14 | SSE 13 | SSE 12 | SSE 13 | SSE 13 | E 7 | E 8 | E 8 | E 8 | ENE 8 | ENE 9 | ENE 9 | ENE 8 | ENE 9 | ENE 9 | ENE 9 | ENE 9 | ENE 9 |
Wave Graph  | |||||||||||||||||||||
 kJ | 725 | 644 | 1187 | 2323 | 633 | 400 | 938 | 838 | 606 | 670 | 624 | 593 | 522 | 795 | 947 | 989 | 463 | 297 | 202 | 202 | 463 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross | cross-off | cross-on | on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross | cross | cross | cross | cross-on | cross-on | cross-off | on | on | cross-on |
High Tide | 4:58PM0.58m | 11:34PM0.46m | 1:25PM0.35m | 00:23AM0.53m | 1:32PM0.37m | 6:51PM0.42m | 1:57PM0.40m | 7:47PM0.34m | 7:28AM0.20m | 2:26PM0.43m | 8:42PM0.28m | 8:39AM0.23m | 2:56PM0.45m | 9:36PM0.23m | 3:16AM0.52m | 3:26PM0.46m | 10:27PM0.21m | ||||
Low Tide | 8:41PM0.33m | 8:37AM-0.08m | 2:18PM0.34m | 9:08PM0.32m | 9:16AM-0.05m | 3:50PM0.29m | 9:36PM0.30m | 9:54AM0.00m | 4:57PM0.23m | 10:06PM0.27m | 6:16AM0.19m | 5:56PM0.18m | 10:37PM0.24m | 6:45AM0.19m | 6:48PM0.14m | 7:14AM0.21m | 7:34PM0.12m | ||||
 | |  |  |  |  | | |  | |  | | | |  | | | | | |  | |
 | 6:56 | — | — | 6:54 | — | — | 6:54 | — | — | 6:54 | — | — | 6:52 | — | — | 6:52 | — | — | 6:50 | — | — |
 | — | 5:53 | — | — | 5:53 | — | — | 5:54 | — | — | 5:54 | — | — | 5:55 | — | — | 5:55 | — | — | 5:57 | — |
mm | 7 | 6 | 2 | 25 | 3 | 5 | 5 | 3 | 7 | 6 | — | 2 | 6 | 1 | — | — | — | 5 | 3 | — | — |
Temp °C | 13 | 14 | 15 | 15 | 15 | 16 | 16 | 16 | 17 | 17 | 18 | 17 | 19 | 19 | 18 | 20 | 20 | 18 | 16 | 16 | 15 |
Feels °C | 12 | 13 | 15 | 11 | 14 | 14 | 13 | 12 | 13 | 14 | 16 | 15 | 19 | 17 | 15 | 21 | 22 | 18 | 15 | 15 | 11 |
Swell 1 Height (m) Direction Period (s) | SSE 12 | SSE 12 | SSE 14 | NE 6 | SSE 13 | SSE 12 | SSE 13 | SSE 13 | SSE 12 | SSE 11 | SSE 11 | SSE 10 | SSE 10 | SSE 10 | SSE 10 | ENE 9 | ENE 9 | ENE 9 | ENE 9 | SSE 6 | SE 6 |
| kJ | 725 | 644 | 1187 | 19 | 633 | 400 | 938 | 838 | 444 | 210 | 153 | 77 | 58 | 58 | 39 | 662 | 463 | 297 | 202 | 107 | 54 |
Swell 2 Height (m) Direction Period (s) | ENE 8 | — | ENE 5 | NE 6 | NE 6 | — | — | — | — | — | E 16 | — | — | — | — | SSE 11 | SSE 10 | SSE 10 | S 9 | ENE 9 | S 7 |
| kJ | 6 | — | 15 | 30 | 9 | — | — | — | — | — | 5 | — | — | — | — | 22 | 22 | 18 | 6 | 202 | 64 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | S 10 | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 17 | — | — | — |
Wind waves Height (m) Direction Period (s) | NE 4 | ENE 5 | — | SSE 14 | SE 7 | ESE 7 | E 7 | E 7 | E 7 | E 8 | E 8 | E 8 | ENE 8 | ENE 9 | ENE 9 | ENE 8 | — | — | S 5 | — | ENE 9 |
| kJ | 21 | 20 | — | 2323 | 311 | 367 | 293 | 377 | 606 | 670 | 624 | 593 | 522 | 795 | 947 | 989 | — | — | 25 | — | 463 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 53 | 0 | 44 | 190 | 208 | 221 | 221 | 230 | 198 | 208 | 53 | 271 | 96 | 230 | 32 | 179 | 179 | 190 | 190 | 208 |
Best forecast wave conditions in Rio Grande Do Sul | |||||||||||||||||||||
Best forecast wave conditions in Brazil | |||||||||||||||||||||
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Information about the Atlantida Surf forecast
The above surf forecast table for Atlantida provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Atlantida can be found by selecting the local surf guide option on the grey menu. Our Atlantida 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 (Atlantida) 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 Atlantida 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.
Are you planning a holiday in Rio Grande Do Sul? If you are looking for accommodation near Atlantida, camping, hotels and holiday cottages in Rio Grande Do Sul, consider staying in Capao da Canoa which is 8 km (5 miles) away. Other places in and around Rio Grande Do Sul where you can find information about places to rent, and car hire include Tramandai which is 21 km (13 miles) away, Osorio, Rolante and Torres.
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