Surf Forecasts:
Segundinha surf forecast from 20 Aug 2026:
- Best quality surf: Monday 24 Aug, 12PM (local time) - 8ft (2.4m), 14s period, S swell with cross-offshore winds.
- Most powerful swell: Tuesday 25 Aug, 3AM (local time) - 10ft (3.0m), 16s period, S swell with 3,741 kJ wave energy.
- Next surfable swell (1★+): Friday 21 Aug, 12AM (local time) - 5ft (1.5m), 7s period with E swell.
Best Forecast Surf Conditions for Segundinha this week:
The surf forecast for Segundinha over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Friday (Aug 21) at 12AM. The primary swell is predicted to be 1.5m and 7s period with a secondary swell of 0.9m and 7s. Another secondary swell of 0.3m and 11s is also forecast. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Segundinha in the next 16 days are 3.0m 16s and forecast to arrive on Tuesday (Aug 25) at 3AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.3m 6s period and expected on Tuesday (Aug 25) at 9PM.
| Wave Type | Time (-03) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 12AM (Fri 21st Aug) | 5ft (1.5m) 7s |
| Best Surf | 12PM (Mon 24th Aug) | 8ft (2.4m) 14s |
| Most Powerful | 3AM (Tue 25th Aug) | 10ft (3.0m) 16s |
Table - best surf conditions forecast for Segundinha over the next 16 days.
The Lowdown
Alright folks, Rusty here.
First up, the water’s currently sitting at about 73°F at Segundinha, which is a touch warmer than what we usually see this time of year. Not a game-changer, but you’ll notice it.
Now, I’ll be straight with you – the next few days are a bit of a write-off. We’ve got a real dry spell through Wednesday, Thursday, and Friday. The swell is tiny, barely pushing 2 feet, period is short, and the energy is weak. Thursday morning goes glassy, but with only 2 feet of weak east swell, there’s just nothing to ride. Friday morning actually looks clean with a light cross-offshore, but the swell is still pitiful. We’re looking at a gap of several days with no real surf on offer.
Things start to stir on Saturday the 22nd. The morning is still poor, but the afternoon sees a jump to about 6 feet of SSW swell with a period of 10 seconds and energy building. It’s rated as marginal, and the wind is onshore, so it’s messy. Sunday the 23rd morning is a bit cleaner with a cross-offshore breeze and 5 feet of SSW swell, but it’s just ordinary.
Now, here’s where it gets interesting. Monday the 24th is the standout. Monday morning we’ve got about 7 feet of south swell, 13-second period, and the energy is building strong. The wind is light easterly, cross-offshore, and it’s clean. By Monday afternoon, that south swell pushes to about 8 feet, period stretches to 14 seconds, and the energy is cranking. The wind stays light and cross-offshore. This is the good stuff. Tuesday the 25th morning is even better – glassy conditions with a light northeasterly, the same 8 feet of south swell, 14-second period, and strong energy. This is big, powerful groundswell. At 8 feet, this is only for the experienced crew. The long period (14 seconds) means it’ll have plenty of punch and shape, but it might wall up a bit at a beach break. Segundinha is a point break, so it should handle it well. Expect crowds to be possible here.
The quality drops off Tuesday afternoon and Wednesday morning the 26th is still good with 6 feet and glassy conditions, but after that, the swell fades fast. The rest of the week and into September is a mix of small, weak, or onshore conditions. The first of September has a bit of size again (6 feet) but short period and poor winds, so not worth getting excited about.
So, the clear winner is Monday the 24th afternoon and Tuesday the 25th morning at Segundinha. Big, clean south groundswell with light winds. It’s the best on offer by a long shot. Keep in mind, long-range forecasts like this can shift, but right now, that’s the window to circle.
Rusty.
Short Range ForecastLight rain (total 2mm), mostly falling on Fri night. Warm (max 29°C on Wed afternoon, min 19°C on Fri night). Winds increasing (calm on Thu morning, fresh winds from the SW by Fri morning). | Days 5-7 Weather SummaryModerate rain (total 10mm), heaviest on Sat night. Warm (max 22°C on Tue morning, min 18°C on Sat night). Wind will be generally light. | |||||||||||||||||||
Wed 19 | Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | ||||||||||||||
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 | E 7 | E 7 | E 7 | E 8 | E 8 | SW 7 | SSW 8 | SSW 10 | SSW 10 | SSW 10 | SSW 9 | S 11 | S 13 | S 14 | S 13 | S 14 | S 14 | S 13 |
Wave Graph | ||||||||||||||||||||
36 | 37 | 36 | 36 | 217 | 74 | 48 | 273 | 238 | 800 | 533 | 378 | 348 | 651 | 1308 | 2886 | 1604 | 2581 | 2095 | 1256 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | glassy | glassy | cross-on | off | cross-off | on | cross-on | on | on | glassy | cross-off | cross | cross | cross-off | cross-off | cross-off | glassy | on | glassy |
High Tide | 8:04PM3.04m | 8:17AM3.16m | 8:12PM3.22m | 8:26AM3.26m | 8:22PM3.34m | 8:38AM3.31m | 8:37PM3.41m | 8:53AM3.30m | 8:56PM3.41m | 9:12AM3.21m | 9:17PM3.33m | 9:33AM3.05m | 9:40PM3.16m | |||||||
Low Tide | 1:56AM-0.13m | 2:10PM-0.04m | 2:24AM-0.33m | 2:37PM-0.14m | 2:52AM-0.38m | 3:03PM-0.12m | 3:18AM-0.31m | 3:28PM0.01m | 3:43AM-0.13m | 3:49PM0.23m | 4:05AM0.15m | 4:03PM0.51m | ||||||||
— | — | 6:13 | — | — | 6:13 | — | — | 6:11 | — | — | 6:11 | — | — | 6:09 | — | — | 6:09 | — | — | |
5:37 | — | — | 5:37 | — | — | 5:37 | — | — | 5:38 | — | — | 5:38 | — | — | 5:38 | — | — | 5:39 | — | |
mm | — | — | — | — | — | — | — | 2 | — | — | 1 | — | — | 4 | 2 | 2 | 1 | — | 2 | 9 |
Temp °C | 29 | 26 | 25 | 26 | 25 | 27 | 23 | 21 | 20 | 20 | 19 | 21 | 20 | 18 | 18 | 18 | 18 | 22 | 21 | 20 |
Feels °C | 27 | 27 | 25 | 26 | 26 | 25 | 21 | 19 | 20 | 19 | 20 | 21 | 20 | 17 | 18 | 18 | 17 | 24 | 21 | 22 |
Swell 1 Height (m) Direction Period (s) | E 7 | E 7 | E 7 | E 7 | E 7 | E 8 | E 8 | SSW 7 | SSW 8 | SSW 10 | SSW 10 | SSW 10 | SSW 9 | S 11 | S 13 | S 14 | S 13 | S 14 | S 14 | S 13 |
36 | 37 | 36 | 36 | 83 | 74 | 48 | 142 | 238 | 800 | 533 | 378 | 348 | 651 | 1308 | 2886 | 1604 | 2581 | 2095 | 1256 | |
Swell 2 Height (m) Direction Period (s) | S 10 | SE 13 | SE 12 | SE 12 | S 11 | SSW 10 | SSW 9 | S 8 | S 11 | E 7 | E 7 | E 8 | E 8 | E 8 | E 7 | — | S 16 | ESE 5 | — | E 5 |
2 | 6 | 6 | 5 | 21 | 32 | 28 | 35 | 94 | 4 | 4 | 5 | 5 | 4 | 1 | — | 1397 | 17 | — | 28 | |
Swell 3 Height (m) Direction Period (s) | SE 13 | SE 8 | S 10 | S 12 | SE 11 | S 16 | S 15 | E 8 | E 8 | — | — | — | — | — | — | — | — | — | — | — |
7 | 3 | 2 | 3 | 5 | 5 | 5 | 12 | 5 | — | — | — | — | — | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | — | — | — | — | E 7 | — | SW 4 | SW 7 | — | — | — | — | — | — | — | — | — | E 5 | ESE 5 | ENE 6 |
— | — | — | — | 217 | — | 29 | 273 | — | — | — | — | — | — | — | — | — | 21 | 18 | 83 | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 54 | 16 | 16 | 45 | 0 | 11 | 710 | 41 | 125 | 165 | 0 | 0 | 30 | 106 | 0 | 0 | 0 | 0 | 65 | 0 |
Best forecast wave conditions in Rio de Janeiro | ||||||||||||||||||||
Best forecast wave conditions in Brazil | ||||||||||||||||||||
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Information about the Segundinha Surf forecast
The above surf forecast table for Segundinha provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Segundinha can be found by selecting the local surf guide option on the grey menu. Our Segundinha 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 (Segundinha) 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 Segundinha 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 de Janeiro? If you are looking for accommodation near Segundinha, camping, hotels and holiday cottages in Rio de Janeiro, consider staying in Niteroi which is 4 km (2 miles) away. Other places in and around Rio de Janeiro where you can find information about places to rent, and car hire include Sao Goncalo which is 13 km (8 miles) away, Rio de Janeiro, Duque de Caxias and Sao Joao de Meriti.











