Surf Forecasts:
Balneario Sao Jose surf forecast from 18 Aug 2026:
- Best quality surf: Tuesday 18 Aug, 3AM (local time) - 4ft (1.2m), 8s period, ESE swell with glassy winds.
- Most powerful swell: Monday 24 Aug, 6PM (local time) - 6ft (1.9m), 14s period, SSE swell with 1,470 kJ wave energy.
- Next surfable swell (1★+): Tuesday 18 Aug, 3AM (local time) - 4ft (1.2m), 8s period with ESE swell.
Best Forecast Surf Conditions for Balneario Sao Jose this week:
The surf forecast for Balneario Sao Jose over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Tuesday (Aug 18) at 3AM. The primary swell is predicted to be 1.2m and 8s period with a secondary swell of 0.3m and 10s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Balneario Sao Jose in the next 16 days are 1.9m 14s and forecast to arrive on Monday (Aug 24) at 6PM. Winds are predicted to be cross-onshore at the time the swell arrives.
| Wave Type | Time (-03) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 3AM (Tue 18th Aug) | 4ft (1.2m) 8s |
| Best Surf | 3AM (Tue 18th Aug) | 4ft (1.2m) 8s |
| Most Powerful | 6PM (Mon 24th Aug) | 6ft (1.9m) 14s |
Table - best surf conditions forecast for Balneario Sao Jose over the next 16 days.
The Lowdown
Alright, Rusty here. Let’s have a look at what’s cooking for the next couple of weeks.
The first good surf hits us Tuesday morning, August 18th. We’ve got a clean 4ft ESE swell, glassy winds, and a combined energy of 219 – that’s a solid, moderate push. The water temp is about average for this time of year, so nothing wild there. Balneario Sao Jose is an exposed beach/pier setup, so it’ll be picking up that ESE swell nicely. The wind is light and offshore, making for some clean, ripable lines. Crowds are often a thing here, but for a Tuesday morning with good conditions, it’s worth the company.
That Tuesday morning session is the standout of the first week. The swell drops off fast after that. Wednesday and Thursday mornings are small and weak, with combined energy in the 50s and 60s – not worth paddling out for. Friday morning picks up a little with a 3ft ESE swell and 107 energy, but it’s still ordinary.
The weekend gets a bit more interesting. Saturday morning, August 22nd, sees a 4ft S swell with a 10-second period and 367 energy, but the wind is cross-shore and conditions are marginal. Not the cleanest. Sunday and Monday bring a building S swell, reaching 5ft by Sunday afternoon with 532 energy, but the wind is cross-onshore and messy. This is more of a kite-surf setup than a clean paddle session.
The real standout of the whole forecast arrives on Wednesday, August 26th. The morning is glassy with a 4ft S swell, 12-second period, and 450 energy – that’s a nice, moderate groundswell. The afternoon is even better: dead calm, glassy, 3ft SSE swell with a 12-second period and 526 energy. The wind is zero, the surface is like glass. This is the best on offer. The point break and reef setups will love that longer period, and the beach breaks might be a little too straight, but the quality is there. Crowds are often, but for this kind of glassy perfection, you’ll take it.
After that, we’ve got clean but smaller surf into Friday, August 28th, with offshore winds and 3ft SSE swell, 13-second period, and 223 energy. Nice, but not the standout. The weekend of August 29th and 30th drops off again with weak, messy swells and poor conditions.
The second week (September 1st and 2nd) sees a small bump in swell size, but the wind is onshore and choppy, and the period is short. Not worth getting excited about.
Overall, the best surf is Tuesday morning, August 18th, and Wednesday, August 26th. The 26th is the real gem – glassy, clean, and with proper groundswell energy.
Rusty.
Short Range ForecastMostly dry. Warm (max 29°C on Tue morning, min 18°C on Wed night). Wind will be generally light. | Days 5-7 Weather SummaryLight rain (total 6mm), mostly falling on Sat night. Warm (max 27°C on Fri morning, min 17°C on Fri night). Wind will be generally light. | ||||||||||||||||||
Tuesday 18 | Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | ||||||||||||||
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) | ESE 8 | ESE 8 | ESE 8 | ESE 8 | E 7 | ESE 7 | E 7 | E 7 | E 7 | E 7 | ESE 7 | ESE 8 | S 6 | S 10 | S 9 | S 10 | S 9 | S 11 | S 12 |
Wave Graph  | |||||||||||||||||||
 kJ | 159 | 202 | 140 | 94 | 54 | 57 | 39 | 26 | 36 | 113 | 84 | 107 | 97 | 333 | 276 | 307 | 276 | 524 | 604 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | glassy | cross-on | cross-off | glassy | cross-on | cross | glassy | cross | cross-off | cross-off | cross-on | cross-on | cross | on | on | cross-on | cross-on | cross-on |
High Tide | 5:19AM1.16m | 5:24PM1.03m | 5:59AM1.03m | 5:50PM0.95m | 6:51AM0.89m | 6:25PM0.85m | 8:30AM0.79m | 1:28PM0.82m | 7:40PM0.75m | 1:16PM0.93m | 00:01AM0.78m | 1:25PM1.04m | 00:39AM0.91m | ||||||
Low Tide | 10:29PM0.32m | 10:52AM0.43m | 10:54PM0.35m | 11:03AM0.55m | 11:23PM0.42m | 11:06AM0.67m | 11:57PM0.52m | 10:28AM0.77m | 5:16PM0.72m | 5:01AM0.47m | 6:21PM0.62m | 6:06AM0.35m | 6:57PM0.51m | ||||||
 |  | | | | | | | |  |  | | | | |  |  |  |  | |
 | — | 6:30 | — | — | 6:28 | — | — | 6:28 | — | — | 6:28 | — | — | 6:26 | — | — | 6:26 | — | — |
 | — | — | 5:50 | — | — | 5:50 | — | — | 5:51 | — | — | 5:51 | — | — | 5:51 | — | — | 5:52 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 2 | 2 | 2 | 3 |
Temp °C | 22 | 29 | 28 | 26 | 29 | 26 | 21 | 24 | 25 | 24 | 27 | 22 | 19 | 19 | 20 | 17 | 18 | 18 | 17 |
Feels °C | 25 | 30 | 29 | 27 | 30 | 27 | 22 | 25 | 26 | 25 | 25 | 21 | 19 | 19 | 19 | 17 | 18 | 18 | 16 |
Swell 1 Height (m) Direction Period (s) | ESE 8 | ESE 8 | ESE 8 | ESE 8 | E 7 | ESE 7 | E 7 | E 7 | S 11 | E 7 | ESE 7 | ESE 8 | S 6 | S 10 | S 9 | S 10 | S 9 | S 11 | S 12 |
| kJ | 159 | 202 | 140 | 94 | 54 | 57 | 39 | 26 | 9 | 56 | 84 | 107 | 97 | 333 | 276 | 307 | 276 | 524 | 604 |
Swell 2 Height (m) Direction Period (s) | SSE 10 | SSE 9 | SSE 9 | S 10 | S 10 | S 10 | SE 13 | SW 4 | SSW 4 | S 9 | SSW 7 | S 15 | E 8 | E 8 | E 8 | E 7 | E 8 | E 7 | E 8 |
| kJ | 33 | 17 | 8 | 2 | 2 | 2 | 7 | 2 | 1 | 28 | 9 | 4 | 50 | 34 | 19 | 9 | 5 | 4 | 1 |
Swell 3 Height (m) Direction Period (s) | — | — | S 11 | SE 8 | SE 8 | SE 13 | S 9 | SE 12 | SE 12 | SW 4 | S 9 | — | — | — | — | — | — | E 7 | — |
| kJ | — | — | 2 | 3 | 3 | 7 | 2 | 6 | 6 | 1 | 13 | — | — | — | — | — | — | 4 | — |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | SW 4 | E 7 | E 7 | WSW 2 | S 4 | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | 3 | 36 | 113 | 1 | 30 | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 0 | 0 | 32 | 0 | 0 | 66 | 48 | 108 | 102 | 0 | 0 | 140 | 168 | 35 | 1291 | 32 | 28 | 28 | 28 |
Best forecast wave conditions in São Paulo | |||||||||||||||||||
Best forecast wave conditions in Brazil | |||||||||||||||||||
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Information about the Balneario Sao Jose Surf forecast
The above surf forecast table for Balneario Sao Jose provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Balneario Sao Jose can be found by selecting the local surf guide option on the grey menu. Our Balneario Sao Jose 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 (Balneario Sao Jose) 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 Balneario Sao Jose 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.
Balneario Sao Jose is 3 km (2 miles) from the city of Mongagua. If you plan a holiday in São Paulo, look for hotels and other accommodation in Mongagua. Mongagua has rooms for a wide range of budgets as well as car hire and transport links.
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