Surf Forecasts:
Triangulo surf forecast from 17 Aug 2026:
- Best quality surf: Tuesday 18 Aug, 7AM (local time) - 6ft (1.9m), 14s period, SW swell with cross-offshore winds.
- Most powerful swell: Tuesday 18 Aug, 1PM (local time) - 7ft (2.1m), 13s period, SW swell with 1,471 kJ wave energy.
- Next surfable swell (1★+): Monday 17 Aug, 7AM (local time) - 3.5ft (1.1m), 15s period with SW swell.
Best Forecast Surf Conditions for Triangulo this week:
The surf forecast for Triangulo over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Monday (Aug 17) at 7AM. The primary swell is predicted to be 1.1m and 15s period with a secondary swell of 0.8m and 10s. Another secondary swell of 0.5m and 4s is also forecast. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Triangulo in the next 16 days are 2.1m 13s and forecast to arrive on Tuesday (Aug 18) at 1PM. Winds are predicted to be cross-offshore at the time the swell arrives.
| Wave Type | Time (-05) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 7AM (Mon 17th Aug) | 3.5ft (1.1m) 15s |
| Best Surf | 7AM (Tue 18th Aug) | 6ft (1.9m) 14s |
| Most Powerful | 1PM (Tue 18th Aug) | 7ft (2.1m) 13s |
Table - best surf conditions forecast for Triangulo over the next 16 days.
The Lowdown
Alright, Rusty here. Let's chew the fat about the waves coming up.
Right from the jump, the window's open but the goods are scarce until we get deep into the second week. There's a real quiet patch in the middle. Let's break it down.
We start with Triangulo. This is a sheltered reef that doesn't break often, so you've got to be patient. On Sunday the 16th, there's some SW swell at 3ft with a super long period of 16 seconds. The combined energy is a moderate 697, and the water temp is a very unusual 71°F (that's 9°F warmer than average). The wind is a cross-off from the S at 12 mph, so the surface is clean, but the forecast doesn't rate the quality highly.
Things get a bit more interesting on Tuesday the 18th. The swell jumps to 6ft in the morning and 7ft in the afternoon from the SW. This is powerful stuff, with combined energy hitting 1169 and 1469 – that's strong. The period drops to 13 and 12 seconds, still good groundswell. The wind is a solid 12-16 mph cross-off, keeping the surface alright. That 7ft afternoon swell is pushing into expert-only territory, especially on an inconsistent reef.
Then we hit the doldrums. From Wednesday the 19th through Saturday the 22nd, conditions get ugly. The wind turns more cross and cross-on, the period drops short (9-8 seconds), and wave quality tanks. By Friday the 21st, the waves are tiny and weak.
Saturday the 22nd is a cruel tease. The swell is a measly 1ft, but the wind goes glassy in the morning. That long period of 19 seconds is amazing for such a small wave, but there's simply no volume. It's essentially flat.
From Sunday the 23rd all the way to the end of the month, it's a long slog of poor to marginal conditions. The swell is small (1ft to 4ft), the winds are mostly cross or cross-onshore, and the vibe is off. A few clean moments pop up, but the energy is low.
Looking way out to the last few days of the month, we see a pulse of life. On Friday the 28th, a 3ft SW swell with a 16-second period appears, offering moderate energy (540) and clean conditions. Saturday the 29th and Sunday the 30th see the swell build more consistently to 4ft and 4ft from the SW, with periods around 13-12 seconds. The wind is light cross-shore, so it's surfable, but not a game-changer. The energy is building, hitting 624 and 644. By Monday the 31st, the energy climbs to 975 with that 4ft SW swell. This is a trend to watch as we get closer, but for now, it's a promise, not a guarantee.
The best of the bunch? There's no classic session here. Tuesday the 18th afternoon has the most size and punch (7ft, strong energy), but the wind holds it back from perfection. For a true standout, I'd point to Sunday the 16th or Monday the 17th for clean, long-period lines, even if they're small, and the very end of the month for the building, cleaner energy. Otherwise, you might be better off finding a different spot or waiting for a different week.
Rusty.
Short Range ForecastMostly dry. Very mild (max 19°C on Sun afternoon, min 17°C on Mon night). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Warm (max 20°C on Fri morning, min 17°C on Wed night). Wind will be generally light. | |||||||||||||||||||
Sun 16 | Monday 17 | Tuesday 18 | Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | ||||||||||||||
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) | SW 16 | SW 15 | SW 14 | SW 16 | SW 12 | SW 13 | SW 12 | SSW 11 | SSW 10 | SSW 9 | SSW 9 | SSW 9 | SSW 9 | SSW 9 | S 9 | S 8 | S 8 | SW 19 | SW 19 | SW 18 |
Wave Graph | ||||||||||||||||||||
302 | 535 | 658 | 236 | 448 | 1144 | 1439 | 943 | 702 | 572 | 542 | 474 | 474 | 311 | 220 | 173 | 105 | 95 | 91 | 83 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross | cross | cross-off | cross-on | cross | cross | on | cross-on | cross | glassy | cross | cross-off |
High Tide | 8:53PM0.71m | 8:46AM0.78m | 9:50PM0.70m | 9:19AM0.67m | 10:54PM0.69m | 9:53AM0.58m | 00:12AM0.68m | 10:36AM0.50m | 1:39AM0.69m | 11:54AM0.45m | 2:51AM0.72m | 1:38PM0.43m | 3:41AM0.76m | |||||||
Low Tide | 2:36AM0.28m | 3:18PM0.19m | 3:34AM0.37m | 3:56PM0.21m | 4:53AM0.44m | 4:40PM0.24m | 7:03AM0.46m | 5:39PM0.26m | 9:09AM0.43m | 6:54PM0.26m | 10:07AM0.39m | 8:02PM0.23m | ||||||||
— | — | 6:20 | — | — | 6:20 | — | — | 6:18 | — | — | 6:18 | — | — | 6:18 | — | — | 6:18 | — | — | |
6:02 | — | — | 6:02 | — | — | 6:04 | — | — | 6:04 | — | — | 6:04 | — | — | 6:04 | — | — | 6:04 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 19 | 18 | 18 | 19 | 19 | 19 | 19 | 17 | 19 | 19 | 18 | 19 | 19 | 18 | 20 | 20 | 18 | 19 | 20 | 18 |
Feels °C | 18 | 17 | 17 | 18 | 18 | 16 | 16 | 14 | 17 | 17 | 18 | 18 | 19 | 18 | 20 | 21 | 19 | 19 | 20 | 18 |
Swell 1 Height (m) Direction Period (s) | SW 11 | SW 15 | SW 14 | SW 13 | SW 12 | SW 13 | SW 12 | SSW 11 | SSW 10 | SSW 9 | SSW 9 | SSW 9 | SSW 9 | SSW 9 | S 9 | S 8 | S 8 | S 8 | S 8 | S 8 |
205 | 535 | 658 | 235 | 448 | 1144 | 1439 | 943 | 702 | 572 | 542 | 474 | 474 | 311 | 220 | 173 | 105 | 82 | 80 | 80 | |
Swell 2 Height (m) Direction Period (s) | SW 16 | SW 10 | SSW 9 | SW 16 | SW 15 | — | SW 20 | SW 13 | SW 13 | SW 12 | SW 12 | SW 14 | SW 16 | SW 14 | SW 14 | SW 13 | SW 13 | SW 12 | SW 12 | SW 11 |
302 | 100 | 71 | 236 | 301 | — | 15 | 290 | 193 | 120 | 69 | 92 | 89 | 132 | 97 | 109 | 80 | 51 | 49 | 31 | |
Swell 3 Height (m) Direction Period (s) | SW 13 | S 4 | — | SSW 9 | — | — | SW 20 | SSW 18 | SW 16 | SW 16 | SW 15 | SW 13 | SW 13 | SW 22 | SW 21 | SW 21 | SW 20 | SW 19 | SW 19 | SW 18 |
171 | 15 | — | 54 | — | — | 15 | 31 | 42 | 67 | 75 | 28 | 7 | 18 | 18 | 17 | 60 | 95 | 91 | 83 | |
Wind waves Height (m) Direction Period (s) | S 5 | — | S 4 | S 4 | — | SSW 5 | — | S 6 | — | — | — | — | — | — | — | — | — | — | — | — |
19 | — | 9 | 18 | — | 25 | — | 144 | — | — | — | — | — | — | — | — | — | — | — | — | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 2 | 0 | 2 | 29 | 0 | 29 | 2 | 29 | 2 | 2 | 0 | 2 | 2 | 2 | 18 | 2 | 2 | 0 | 2 | 0 |
Best forecast wave conditions in Lima | ||||||||||||||||||||
Best forecast wave conditions in Peru | ||||||||||||||||||||
Header Global | ||||||||||||||||||||
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)
Wind Speed (km/h)
Information about the Triangulo Surf forecast
The above surf forecast table for Triangulo provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Triangulo can be found by selecting the local surf guide option on the grey menu. Our Triangulo 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 (Triangulo) 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 Triangulo 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.
Triangulo is 7 km (4 miles) from the city of Lima. If you plan a holiday in Lima, look for hotels and other accommodation in Lima. Lima has rooms for a wide range of budgets as well as car hire and transport links.











