Surf Forecasts:
Massaguacu surf forecast from 13 Aug 2026:
- Best quality surf: Monday 17 Aug, 12AM (local time) - 8ft (2.5m), 8s period, E swell with glassy winds.
- Most powerful swell: Saturday 15 Aug, 12PM (local time) - 6.5ft (2.0m), 13s period, SE swell with 1,279 kJ wave energy.
- Next surfable swell (1★+): Sunday 16 Aug, 6AM (local time) - 5ft (1.6m), 8s period with ESE swell.
Best Forecast Surf Conditions for Massaguacu this week:
The surf forecast for Massaguacu over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Sunday (Aug 16) at 6AM. The primary swell is predicted to be 1.6m and 8s period with a secondary swell of 0.1m and 13s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Massaguacu in the next 16 days are 2.0m 13s and forecast to arrive on Saturday (Aug 15) 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 1.8m 13s period and expected on Saturday (Aug 15) at 3AM.
| Wave Type | Time (-03) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6AM (Sun 16th Aug) | 5ft (1.6m) 8s |
| Best Surf | 12AM (Mon 17th Aug) | 8ft (2.5m) 8s |
| Most Powerful | 12PM (Sat 15th Aug) | 6.5ft (2.0m) 13s |
Table - best surf conditions forecast for Massaguacu over the next 16 days.
The Lowdown
Right, so let’s have a look at what’s happening.
First off, it’s been a pretty quiet stretch at Massaguacu. A lot of days with tiny swell and poor conditions, so the early part of the outlook is a bit of a write-off. From Thursday the 13th through Saturday the 15th, it’s flat or junk. The water is sitting at a very warm 72°, which is much warmer than what’s normal for this time of year – you’ll feel it.
The first real chance to paddle out comes on the Sunday morning the 16th with a bit of 5ft swell out of the ESE, clean and glassy with very light ENE winds. It’s not amazing, but it’s surfable. The swell energy is still only moderate at 236.
Monday the 17th is the real standout of the whole 16-day window. The morning looks absolute magic – 8ft of E swell, period 9 seconds, and no wind at all. The combined energy reading is a solid 1073, so there’s decent power in the water. That’s expert-level surf with that height – not for beginners. The glassy calm winds will make it clean as a whistle. If you’re a strong surfer, be on it early at Massaguacu. The afternoon drops off fast though, so don’t sleep in.
From Tuesday the 18th through the following week, it’s mostly ordinary. You get some little windows of clean, small waves – like the Thursday the 20th with 5ft sets and glassy NE winds, and Friday the 21st morning with clean 3ft waves. But nothing else really fires up. The spot is a bit inconsistent anyway, so a few days of flat or weak surf isn’t a huge shock here.
Moving further out, the Wednesday the 26th has a pulse of 5ft SE swell early, glassy, but the energy is moderate at 250 and the risk of storms is there. It’s surfable but not a standout. Then the very end of the outlook, Friday morning the 28th, shows 5ft ESE swell in glassy conditions and calm winds – that’s a promising, clean option for the second week, but it’s a long way out, so keep an eye on it.
The overall pick is definitely Monday the 17th morning. Get in early.
Rusty.
Short Range ForecastLight rain (total 6mm), mostly falling on Sat morning. Warm (max 26°C on Sun morning, min 19°C on Thu night). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Warm (max 34°C on Wed morning, min 20°C on Sun afternoon). 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) | E 5 | E 5 | E 8 | E 8 | E 9 | SE 13 | ESE 7 | ESE 7 | ESE 8 | ESE 8 | E 8 | ESE 8 | ESE 8 | ESE 8 | E 8 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | E 7 |
Wave Graph  | ||||||||||||||||||||
 kJ | 14 | 5 | 6 | 6 | 2 | 1242 | 215 | 252 | 328 | 404 | 877 | 329 | 228 | 262 | 542 | 185 | 113 | 105 | 99 | 183 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | glassy | glassy | on | cross | cross-on | cross-on | cross | cross-on | cross-on | glassy | glassy | on | glassy | glassy | glassy | off | cross-off | glassy | off |
High Tide | 3:28PM1.09m | 2:54AM1.16m | 3:47PM1.05m | 3:25AM1.18m | 4:05PM1.01m | 3:57AM1.15m | 4:25PM0.97m | 4:31AM1.09m | 4:46PM0.93m | 5:06AM0.99m | 5:08PM0.89m | 5:45AM0.88m | 5:32PM0.82m | |||||||
Low Tide | 9:35PM0.34m | 9:53AM-0.03m | 9:58PM0.33m | 10:23AM0.06m | 10:20PM0.31m | 10:51AM0.17m | 10:42PM0.30m | 11:16AM0.28m | 11:07PM0.30m | 11:40AM0.40m | 11:39PM0.33m | 12:10PM0.52m | 00:33AM0.38m | |||||||
 |  |  | | |  |  | | | |  | | | | | | | | | | |
 | — | — | 6:28 | — | — | 6:26 | — | — | 6:26 | — | — | 6:24 | — | — | 6:24 | — | — | 6:24 | — | — |
 | 5:43 | — | — | 5:44 | — | — | 5:44 | — | — | 5:45 | — | — | 5:45 | — | — | 5:45 | — | — | 5:45 | — |
mm | — | — | — | — | — | 3 | 3 | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 25 | 20 | 24 | 24 | 21 | 21 | 21 | 20 | 26 | 24 | 20 | 29 | 28 | 23 | 33 | 32 | 25 | 34 | 33 | 26 |
Feels °C | 28 | 23 | 26 | 26 | 23 | 23 | 23 | 22 | 28 | 26 | 23 | 31 | 31 | 26 | 35 | 34 | 26 | 34 | 34 | 26 |
Swell 1 Height (m) Direction Period (s) | SSE 14 | SSE 14 | SSE 13 | SSE 13 | SSE 14 | SE 13 | SSE 12 | SSE 12 | SSE 11 | SSE 11 | ESE 9 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | S 10 | ESE 7 |
| kJ | 1076 | 961 | 642 | 651 | 933 | 1242 | 482 | 254 | 133 | 93 | 442 | 329 | 228 | 262 | 216 | 185 | 113 | 105 | 2 | 73 |
Swell 2 Height (m) Direction Period (s) | E 5 | E 5 | E 8 | E 8 | E 9 | — | — | — | SE 13 | ESE 13 | SSE 11 | SSE 11 | SSE 10 | SSE 10 | SSE 10 | S 9 | S 9 | S 10 | SE 13 | S 9 |
| kJ | 14 | 5 | 6 | 6 | 2 | — | — | — | 7 | 16 | 69 | 38 | 36 | 20 | 10 | 7 | 7 | 2 | 7 | 2 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | SE 10 | — | S 11 | — | S 8 | SE 13 |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 4 | — | 2 | — | 1 | 7 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | E 9 | ESE 7 | ESE 7 | ESE 8 | ESE 8 | E 8 | — | — | — | E 8 | — | — | — | ESE 8 | E 7 |
| kJ | — | — | — | — | — | 16 | 215 | 252 | 328 | 404 | 877 | — | — | — | 542 | — | — | — | 99 | 183 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 12 | 12 | 12 | 73 | 12 | 32 | 33 | 12 | 20 | 33 | 0 | 0 | 29 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Best forecast wave conditions in São Paulo | ||||||||||||||||||||
Best forecast wave conditions in Brazil | ||||||||||||||||||||
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Information about the Massaguacu Surf forecast
The above surf forecast table for Massaguacu provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Massaguacu can be found by selecting the local surf guide option on the grey menu. Our Massaguacu 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 (Massaguacu) 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 Massaguacu 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.
Massaguacu is 9 km (6 miles) from the city of Caraguatatuba. If you plan a holiday in São Paulo, look for hotels and other accommodation in Caraguatatuba. Caraguatatuba has rooms for a wide range of budgets as well as car hire and transport links.
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