Surf Forecasts:
Prainha surf forecast from 18 Jul 2026:
- Best quality surf: Friday 24 Jul, 12AM (local time) - 6ft (1.8m), 8s period, SSE swell with cross-offshore winds.
- Most powerful swell: Friday 24 Jul, 12AM (local time) - 6ft (1.8m), 8s period, SSE swell with 408 kJ wave energy.
- Next surfable swell (1★+): Monday 20 Jul, 3AM (local time) - 3.5ft (1.1m), 8s period with E swell.
Best Forecast Surf Conditions for Prainha this week:
The surf forecast for Prainha over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Monday (Jul 20) at 3AM. The primary swell is predicted to be 1.1m and 8s period. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Prainha in the next 16 days are 1.8m 8s and forecast to arrive on Friday (Jul 24) at 12AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.7m 8s period and expected on Sunday (Jul 19) at 9PM.
| Wave Type | Time (-03) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 3AM (Mon 20th Jul) | 3.5ft (1.1m) 8s |
| Best Surf | 12AM (Fri 24th Jul) | 6ft (1.8m) 8s |
| Most Powerful | 12AM (Fri 24th Jul) | 6ft (1.8m) 8s |
Table - best surf conditions forecast for Prainha over the next 16 days.
The Lowdown
Alright, Rusty here, let’s talk about what’s cookin’ at Prainha.
Honestly, the next week and a half is a bit of a mixed bag. We’ve got some small, clean windows but nothing that’ll have you scrambling for your board. The water’s sitting at about 64°, which is pretty much normal for this time of year, so no surprises there.
The first real glimmer of decent surf shows up on Friday, July 24th, in the morning. We’re looking at chest-high waves around 5 ft, coming from the SSE with a short 8-second period. The energy is moderate (360), and with a light offshore breeze from the south, it’s gonna be clean. This is the standout of the first week – a solid session for advanced surfers, though it’s a bit dumpy for beginners. Expect crowds to be possible.
After that, the surf gets small and inconsistent. We hit a dry spell from Saturday, July 25th, right through to Tuesday, July 28th, with only knee-to-waist high, weak waves and mostly messy winds. Not worth the paddle out.
Then, on Wednesday, July 29th, things get interesting again. The morning brings a 4 ft swell from the east with a longer 11-second period, pushing moderate energy (331). The wind is light and cross-off from the NW, so it’ll be glassy and clean. This is the best of the whole outlook – a proper long-period groundswell that’ll handle the point and reef setups well. The afternoon holds up too, with 4 ft and clean conditions. Keep an eye on this one, but it’s a week and a half out, so don’t lock it in yet.
Beyond that, Thursday the 30th and Friday the 31st drop back to small, ordinary waves. The first few days of August are looking weak and onshore, with nothing to write home about.
So, bottom line: if you’re picking a day, aim for Friday the 24th morning for a clean, head-high session, or Wednesday the 29th morning for the best quality swell of the whole run. The rest is mostly a waiting game.
- Rusty
Short Range ForecastMostly dry. Warm (max 26°C on Sat afternoon, min 18°C on Sat night). Wind will be generally light. | Days 4-6 Weather SummaryHeavy rain (total 31mm), heaviest during Wed afternoon. Warm (max 23°C on Tue morning, min 16°C on Thu morning). Wind will be generally light. | ||||||||||||||||||||
Saturday 18 | Sunday 19 | Monday 20 | Tuesday 21 | Wednesday 22 | Thursday 23 | Friday 24 | |||||||||||||||
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 | SE 10 | SE 10 | E 8 | S 13 | E 8 | E 8 | S 12 | S 11 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 9 | E 8 | SSE 8 | SE 8 | SE 9 | SE 8 |
Wave Graph  | |||||||||||||||||||||
 kJ | 124 | 4 | 4 | 90 | 3 | 169 | 127 | 3 | 2 | 105 | 82 | 86 | 64 | 66 | 92 | 94 | 69 | 408 | 120 | 129 | 86 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-on | cross-on | cross | on | cross | glassy | on | glassy | glassy | cross-on | cross-off | cross-off | glassy | cross | cross | cross | cross-off | cross-off | cross-off | cross-off |
High Tide | 6:03PM1.07m | 5:50AM1.14m | 6:40PM1.00m | 6:40AM1.07m | 7:21PM0.93m | 7:41AM0.99m | 8:11PM0.88m | 8:54AM0.93m | 4:18PM0.68m | 9:14PM0.85m | 10:17AM0.93m | 10:25PM0.85m | 11:34AM0.99m | 11:33PM0.90m | |||||||
Low Tide | 10:28AM0.16m | 10:24PM0.46m | 11:02AM0.25m | 11:02PM0.44m | 11:39AM0.36m | 11:46PM0.44m | 12:20PM0.48m | 00:39AM0.47m | 1:13PM0.60m | 1:52AM0.50m | 6:26PM0.63m | 5:56AM0.45m | 7:10PM0.56m | ||||||||
 | |  | | | | | | |  | |  |  |  |  |  | |  | | |  | |
 | 6:58 | — | — | 6:58 | — | — | 6:58 | — | — | 6:58 | — | — | 6:58 | — | — | 6:58 | — | — | 6:56 | — | — |
 | — | 5:39 | — | — | 5:40 | — | — | 5:40 | — | — | 5:42 | — | — | 5:42 | — | — | 5:43 | — | — | 5:43 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | 16 | 12 | 1 | 1 | 1 | 2 | 3 | 9 |
Temp °C | 22 | 26 | 25 | 20 | 23 | 21 | 22 | 23 | 23 | 23 | 22 | 18 | 20 | 20 | 19 | 16 | 17 | 16 | 16 | 17 | 17 |
Feels °C | 19 | 23 | 23 | 18 | 21 | 19 | 21 | 22 | 23 | 22 | 21 | 18 | 22 | 23 | 20 | 12 | 14 | 14 | 15 | 17 | 17 |
Swell 1 Height (m) Direction Period (s) | E 8 | E 8 | E 8 | E 8 | ENE 7 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 9 | E 8 | SE 8 | E 8 | E 8 | SE 8 |
| kJ | 124 | 147 | 140 | 90 | 91 | 169 | 127 | 134 | 140 | 105 | 82 | 86 | 64 | 66 | 92 | 94 | 69 | 171 | 35 | 35 | 86 |
Swell 2 Height (m) Direction Period (s) | ESE 10 | SE 10 | SE 10 | — | S 13 | S 12 | S 12 | S 12 | S 11 | S 11 | — | S 10 | S 9 | SE 5 | SE 8 | SSE 9 | SE 9 | E 8 | — | S 11 | ENE 8 |
| kJ | 20 | 4 | 4 | — | 3 | 3 | 3 | 3 | 2 | 2 | — | 2 | 2 | 8 | 3 | 8 | 14 | 36 | — | 2 | 22 |
Swell 3 Height (m) Direction Period (s) | S 14 | — | — | SE 14 | — | — | — | — | — | — | — | — | — | S 9 | — | — | — | — | — | — | S 10 |
| kJ | 4 | — | — | 8 | — | — | — | — | — | — | — | — | — | 2 | — | — | — | — | — | — | 7 |
Wind waves Height (m) Direction Period (s) | — | ENE 8 | ENE 8 | — | ENE 8 | ENE 8 | — | — | — | — | — | — | SE 4 | — | — | — | SSE 6 | SSE 8 | SE 8 | SE 9 | — |
| kJ | — | 299 | 343 | — | 176 | 390 | — | — | — | — | — | — | 3 | — | — | — | 39 | 408 | 120 | 129 | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 4 | 40 | 4 | 0 | 77 | 4 | 0 | 61 | 4 | 0 | 59 | 0 | 0 | 4 | 4 | 59 | 33 | 33 | 0 | 4 | 73 |
Best forecast wave conditions in Santa Catarina - Norte | |||||||||||||||||||||
Best forecast wave conditions in Brazil | |||||||||||||||||||||
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Information about the Prainha Surf forecast
The above surf forecast table for Prainha provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Prainha can be found by selecting the local surf guide option on the grey menu. Our Prainha 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 (Prainha) 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 Prainha 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.
Prainha is 14 km (9 miles) from Sao Francisco do Sul. If you plan a holiday in Santa Catarina - Norte, look for hotels and other accommodation in Sao Francisco do Sul. Sao Francisco do Sul has rooms for a wide range of budgets as well as car hire and transport links.
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