10-day surf forecast with Strike Scores for Itacoatiara, Niterói, RJ, Brazil
Itacoatiara is the most powerful wave in Rio de Janeiro state, a heavy beach break wedged between dramatic granite boulders on the coast of Niterói. The "Costão" section at the south end produces the hollowest barrels, fast lefts that barrel over shallow sand with impressive force. The spot has hosted international competitions and is known for producing some of Brazil's best tube riders. The setting is stunning, with Sugar Loaf-like rock formations framing the lineup.
Best day in the forecast: 2026-08-05 with a score of 51/100 (Fair)
Poor conditions overall: Average score 34/100. Look for spots with better forecasts.
Poor alignment: Swell from 166° is 31° off optimal 135°, barely within workable range 112°-180°.
Too small: 0.9m is below minimum 1.2m. Waves will be weak/mushy.
Moderate period: 11s meets minimum 10s but below ideal 14s. Some groundswell energy present.
Onshore/cross-shore: 8 km/h from 104° (ESE). Destroying wave quality. Offshore range: 315°-45°.
Groundswell-dominant conditions (clean, long-period waves).
Poor conditions at Itacoatiara. Either swell direction (166°), size (0.9m), or wind (8 km/h from 104°) is unfavorable. Consider other spots or wait for better conditions.
0.9m (3.0ft) swell from 166° (SSE) at 11s period
Poor alignment: Swell from 182° is 47° off optimal 135°, barely within workable range 112°-180°.
Marginal size: 1.2m is 1.2m from ideal 2.4m.
Good period: 13s is 93% of ideal 14s. Clean, powerful groundswell.
Onshore/cross-shore: 8 km/h from 57° (ENE). Destroying wave quality. Offshore range: 315°-45°.
Surfable but not special at Itacoatiara. The 1.2m swell from 182° is workable, but conditions aren't ideal. Fine if you're local, but not worth a dedicated trip.
1.2m (3.9ft) swell from 182° (S) at 13s period
Poor alignment: Swell from 101° is 34° off optimal 135°, barely within workable range 112°-180°.
Too small: 1.0m is below minimum 1.2m. Waves will be weak/mushy.
Short period: 9s is below minimum 10s. Windswell-dominated (choppy, weak waves).
Light offshore: 7 km/h from 16° (NNE). Grooming the wave face beautifully.
Poor conditions at Itacoatiara. Either swell direction (101°), size (1.0m), or wind (7 km/h from 16°) is unfavorable. Consider other spots or wait for better conditions.
1.0m (3.3ft) swell from 101° (E) at 9s period
Poor alignment: Swell from 98° is 37° off optimal 135°, barely within workable range 112°-180°.
Moderate offshore: 10 km/h from 321° (NW). Still grooming but noticeable wind.
Poor conditions at Itacoatiara. Either swell direction (98°), size (0.9m), or wind (10 km/h from 321°) is unfavorable. Consider other spots or wait for better conditions.
0.9m (3.0ft) swell from 98° (E) at 9s period
Poor alignment: Swell from 184° is 49° off optimal 135°, barely within workable range 112°-180°.
Too small: 1.1m is below minimum 1.2m. Waves will be weak/mushy.
Onshore/cross-shore: 10 km/h from 90° (E). Destroying wave quality. Offshore range: 315°-45°.
Poor conditions at Itacoatiara. Either swell direction (184°), size (1.1m), or wind (10 km/h from 90°) is unfavorable. Consider other spots or wait for better conditions.
1.1m (3.6ft) swell from 184° (S) at 11s period
Poor alignment: Swell from 191° is 56° off optimal 135°, barely within workable range 112°-180°.
Marginal size: 1.8m is 0.6m from ideal 2.4m.
Perfect period: 14s is at or above ideal 14s. Long-period groundswell with maximum power.
Onshore/cross-shore: 7 km/h from 181° (S). Destroying wave quality. Offshore range: 315°-45°.
Poor conditions at Itacoatiara. Either swell direction (191°), size (1.8m), or wind (7 km/h from 181°) is unfavorable. Consider other spots or wait for better conditions.
1.8m (5.9ft) swell from 191° (S) at 14s period
Poor alignment: Swell from 185° is 50° off optimal 135°, barely within workable range 112°-180°.
Marginal size: 1.9m is 0.5m from ideal 2.4m.
Onshore/cross-shore: 13 km/h from 192° (SSW). Destroying wave quality. Offshore range: 315°-45°.
Poor conditions at Itacoatiara. Either swell direction (185°), size (1.9m), or wind (13 km/h from 192°) is unfavorable. Consider other spots or wait for better conditions.
1.9m (6.2ft) swell from 185° (S) at 13s period
Local wind-generated waves (choppy, short-period)
Poor alignment: Swell from 192° is 57° off optimal 135°, barely within workable range 112°-180°.
Marginal size: 2.3m is 0.1m from ideal 2.4m.
Onshore/cross-shore: 13 km/h from 113° (ESE). Destroying wave quality. Offshore range: 315°-45°.
Poor conditions at Itacoatiara. Either swell direction (192°), size (2.3m), or wind (13 km/h from 113°) is unfavorable. Consider other spots or wait for better conditions.
2.3m (7.5ft) swell from 192° (SSW) at 13s period
Very low confidence (8-10 day forecast, conditions may change)
Moderate period: 12s meets minimum 10s but below ideal 14s. Some groundswell energy present.
Onshore/cross-shore: 13 km/h from 99° (E). Destroying wave quality. Offshore range: 315°-45°.
Poor conditions at Itacoatiara. Either swell direction (182°), size (1.9m), or wind (13 km/h from 99°) is unfavorable. Consider other spots or wait for better conditions.
1.9m (6.2ft) swell from 182° (S) at 12s period
Poor alignment: Swell from 186° is 51° off optimal 135°, barely within workable range 112°-180°.
Marginal size: 2.5m is 0.1m from ideal 2.4m.
Onshore/cross-shore: 7 km/h from 50° (NE). Destroying wave quality. Offshore range: 315°-45°.
Surfable but not special at Itacoatiara. The 2.5m swell from 186° is workable, but conditions aren't ideal. Fine if you're local, but not worth a dedicated trip.
2.5m (8.2ft) swell from 186° (S) at 12s period
Open-Meteo Weather API (wind/weather data)