Surf Forecasts:
Caioba surf forecast from 20 Aug 2026:
- Best quality surf: Monday 24 Aug, 6PM (local time) - 2.5ft (0.7m), 16s period, SE swell with glassy winds.
- Most powerful swell: Saturday 22 Aug, 9AM (local time) - 5ft (1.6m), 10s period, SSE swell with 461 kJ wave energy.
- Next surfable swell (1★+): Monday 24 Aug, 6PM (local time) - 2.5ft (0.7m), 16s period with SE swell.
Best Forecast Surf Conditions for Caioba this week:
The surf forecast for Caioba over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Monday (Aug 24) at 6PM. The primary swell is predicted to be 0.7m and 16s period with a secondary swell of 0.4m and 4s. Another secondary swell of 0.3m and 4s is also forecast. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Caioba in the next 16 days are 1.6m 10s and forecast to arrive on Saturday (Aug 22) at 9AM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.5m 7s period and expected on Friday (Aug 21) at 12AM.
| Wave Type | Time (-03) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6PM (Mon 24th Aug) | 2.5ft (0.7m) 16s |
| Best Surf | 6PM (Mon 24th Aug) | 2.5ft (0.7m) 16s |
| Most Powerful | 9AM (Sat 22nd Aug) | 5ft (1.6m) 10s |
Table - best surf conditions forecast for Caioba over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s break down what’s on the cards for Caioba over the next couple of weeks.
Right off the bat, I’ve gotta be straight with you – the first week and a half is a real struggle. We’re in a flat spell with tiny, weak waves and a lot of onshore or cross-shore wind messing things up. The water temp is sitting at 71°F which is a good 6°F warmer than usual for this time of year, so it feels like a bathtub out there, but that’s about the only highlight for a while.
From Thursday, August 20th through to the end of August, you’re looking at ankle-to-knee-high slop, mostly from the east with short periods of 7 to 10 seconds. The combined wave energy is very low, often under 100 (33, 24, 18, 17, 42, 85) – that’s barely enough to keep a longboard moving. The wind is a mixed bag, but we get a few glassy mornings on the 25th, 27th, 28th, and 30th, with the 25th showing a bit of shape from the SE swell (14-16 sec period) but still only 2 to 2 ft. It’s surfable, but ordinary.
The real gem in this forecast is way out there – Friday, September 4th. The morning session looks promising with a clean 5 ft swell from the southeast, period of 10 seconds, and a nice cross-off breeze from the WSW. The wave energy jumps to 508 (moderate), and the conditions are rated as “very good.” That’s the standout. The afternoon gets a bit bigger, 7 ft from the SSE, but the wind swings onshore and it’s a touch lumpy, plus at that size it’s getting into expert territory.
So, my call: sit tight, scratch the itch on the glassy mornings if you’re desperate, but circle September 4th on the calendar. That Friday morning is the one to aim for.
Rusty
Short Range ForecastLight rain (total 7mm), mostly falling on Sat morning. Warm (max 22°C on Thu morning, min 14°C on Sat night). Wind will be generally light. | Days 4-6 Weather SummaryLight rain (total 4mm), mostly falling on Sun morning. Very mild (max 16°C on Sun afternoon, min 14°C on Sun morning). Wind will be generally light. | ||||||||||||||||||||
Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | Wednesday 26 | |||||||||||||||
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 7 | E 7 | SE 11 | E 7 | E 7 | SSE 6 | SSE 10 | SE 10 | SE 10 | SE 12 | SE 13 | SE 13 | SE 15 | SE 16 | SE 15 | SE 14 | SE 13 | SE 13 | SE 16 | SE 16 | SE 14 |
Wave Graph  | |||||||||||||||||||||
 kJ | 27 | 17 | 5 | 15 | 15 | 74 | 461 | 100 | 24 | 35 | 84 | 108 | 212 | 306 | 255 | 192 | 109 | 80 | 65 | 88 | 167 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | cross | cross-off | cross-off | on | cross-on | on | cross-on | cross | cross | on | on | cross-on | cross-on | cross-off | glassy | glassy | cross-off | glassy | on | cross-off |
High Tide | 3:29PM0.82m | 8:18PM0.82m | 3:59AM0.62m | 3:07PM0.82m | 9:51PM0.81m | 11:22AM0.98m | 11:14PM0.89m | 12:25PM1.10m | 00:14AM1.02m | 1:07PM1.22m | 00:58AM1.16m | 1:43PM1.32m | 1:35AM1.28m | 2:16PM1.40m | 2:11AM1.39m | ||||||
Low Tide | 12:05PM0.65m | 00:40AM0.49m | 5:17AM0.61m | 1:00PM0.79m | 6:39PM0.67m | 6:11AM0.48m | 7:09PM0.57m | 6:49AM0.35m | 7:34PM0.49m | 7:20AM0.23m | 7:56PM0.43m | 7:47AM0.13m | 8:15PM0.38m | 8:09AM0.06m | 8:27PM0.35m | ||||||
 | |  |  | |  |  | |  | | | |  | |  | | | | | | | |
 | 6:37 | — | — | 6:37 | — | — | 6:35 | — | — | 6:35 | — | — | 6:33 | — | — | 6:33 | — | — | 6:33 | — | — |
 | — | 5:55 | — | — | 5:57 | — | — | 5:57 | — | — | 5:58 | — | — | 5:58 | — | — | 5:59 | — | — | 5:59 | — |
mm | — | — | — | — | — | — | 2 | 1 | 4 | 1 | — | 3 | — | — | — | — | — | — | — | — | — |
Temp °C | 22 | 22 | 22 | 22 | 22 | 17 | 16 | 16 | 16 | 15 | 16 | 16 | 14 | 15 | 15 | 15 | 16 | 16 | 19 | 19 | 17 |
Feels °C | 23 | 22 | 23 | 20 | 19 | 15 | 15 | 15 | 15 | 14 | 15 | 14 | 12 | 14 | 15 | 15 | 16 | 16 | 19 | 19 | 18 |
Swell 1 Height (m) Direction Period (s) | E 7 | E 7 | E 7 | E 7 | E 7 | SE 5 | SE 10 | SE 10 | SE 5 | SE 5 | SE 13 | SE 13 | SE 15 | SE 16 | SE 15 | SE 14 | SE 13 | SE 13 | E 5 | E 6 | SE 14 |
| kJ | 27 | 17 | 26 | 15 | 15 | 19 | 108 | 100 | 10 | 6 | 84 | 108 | 212 | 306 | 255 | 192 | 109 | 80 | 13 | 23 | 167 |
Swell 2 Height (m) Direction Period (s) | SE 4 | SE 5 | SSE 5 | S 3 | S 3 | E 8 | E 8 | E 8 | SE 10 | SE 12 | E 7 | E 7 | SE 4 | SE 4 | E 6 | E 7 | E 4 | E 4 | SE 12 | SE 12 | E 6 |
| kJ | 3 | 5 | 2 | 1 | 1 | 30 | 21 | 12 | 24 | 35 | 1 | 1 | 12 | 9 | 1 | 1 | 1 | 6 | 53 | 53 | 27 |
Swell 3 Height (m) Direction Period (s) | E 12 | S 10 | SE 11 | SSE 5 | S 6 | SE 10 | — | — | E 8 | E 7 | — | — | E 7 | E 7 | E 6 | E 6 | E 6 | ESE 16 | SE 16 | SE 16 | — |
| kJ | 3 | 2 | 5 | 2 | 1 | 26 | — | — | 5 | 1 | — | — | 1 | 1 | 1 | 1 | 1 | 25 | 65 | 88 | — |
Wind waves Height (m) Direction Period (s) | — | — | — | WSW 3 | — | SSE 6 | SSE 10 | — | — | — | — | SE 4 | SSE 5 | — | — | — | — | — | — | — | — |
| kJ | — | — | — | 1 | — | 74 | 461 | — | — | — | — | 7 | 36 | — | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 19 | 257 | 104 | 19 | 117 | 41 | 104 | 226 | 32 | 94 | 172 | 105 | 41 | 6 | 0 | 0 | 0 | 0 | 0 | 94 | 0 |
Best forecast wave conditions in Paraná | |||||||||||||||||||||
Best forecast wave conditions in Brazil | |||||||||||||||||||||
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Information about the Caioba Surf forecast
The above surf forecast table for Caioba provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Caioba can be found by selecting the local surf guide option on the grey menu. Our Caioba 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 (Caioba) 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 Caioba 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.
Caioba is 6 km (4 miles) from the city of Guaratuba. If you plan a holiday in Paraná, look for hotels and other accommodation in Guaratuba. Guaratuba has rooms for a wide range of budgets as well as car hire and transport links.
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