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Surf Forecasts:
Itaipu surfForecast / Rio de Janeiro / Brazil
48hr Weather and Surf, issued 2 pm Monday 18 May 2026 -03Forecast update in hr min s Forecast update imminent
Itaipu surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Itaipu sea temperature is
23.4° C
(Which is slightly cooler than normal)How big are the waves at Itaipu today?
The current surf forecast for Itaipu at 6PM is: 0.7m 10s primary swell from a South direction and 0.3m 16s secondary swell from a South direction, 0.4m 3s secondary swell from a Southwest direction (forecast issued at 02:00pm May 18). The wind direction is predicted to be onshore.
| Time (-03) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (18 May) | - | - |
| Afternoon (18 May) | 2.5ft (0.8m) | 10s |
| Evening (18 May) | 2.5ft (0.7m) | 10s |
Table - waves today at Itaipu. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastHeavy rain (total 35mm), heaviest during Wed night. Warm (max 23°C on Mon afternoon, min 19°C on Thu morning). Winds decreasing (fresh winds from the WSW on Tue morning, calm by Thu morning). | ||||||||||||||||||||||||
Mon 18 | Tuesday 19 | Wednesday 20 | Thu 21 | |||||||||||||||||||||
12 PM | 3 PM | 6 PM | 9 PM | 12 AM | 3 AM | 6 AM | 9 AM | 12 PM | 3 PM | 6 PM | 9 PM | 12 AM | 3 AM | 6 AM | 9 AM | 12 PM | 3 PM | 6 PM | 9 PM | 12 AM | 3 AM | 6 AM | 9 AM | |
Swell Height Map |    |    |    |    | ||||||||||||||||||||
S 10 | S 10 | S 10 | S 10 | S 15 | S 14 | S 14 | S 9 | SW 8 | SSW 8 | S 19 | S 18 | S 18 | S 16 | S 16 | S 15 | S 14 | S 14 | S 14 | S 13 | S 13 | S 13 | S 14 | S 15 | |
123 | 121 | 90 | 89 | 68 | 103 | 92 | 79 | 390 | 384 | 362 | 520 | 1537 | 1812 | 2131 | 2906 | 2375 | 1914 | 1553 | 1408 | 976 | 976 | 1303 | 1699 | |
Wind (km/h) | ||||||||||||||||||||||||
on | on | on | on | cross-on | cross-on | on | cross-on | cross-on | cross-on | on | cross-on | cross | cross-on | cross-on | glassy | on | cross-on | cross | cross-off | cross-off | cross | cross | cross | |
High Tide | 4:53PM1.03m | 2:39AM0.91m | 5:45PM0.96m | 3:19AM0.94m | 6:43PM0.90m | 4:06AM0.95m | ||||||||||||||||||
Low Tide | 9:32AM-0.15m | 10:07PM0.27m | 10:19AM-0.15m | 10:52PM0.34m | 11:10AM-0.11m | 11:39PM0.38m | ||||||||||||||||||
 | |  | |  | | | |  | | | | | | | | | | | | | | | | |
 | — | — | — | — | — | — | 6:18 | — | — | — | — | — | — | — | 6:20 | — | — | — | — | — | — | — | 6:20 | — |
 | — | 5:16 | — | — | — | — | — | — | — | 5:16 | — | — | — | — | — | — | — | 5:16 | — | — | — | — | — | 5:15 |
— | — | — | — | 1 | 1 | 1 | — | 1 | 1 | 2 | 3 | 2 | 1 | 1 | 2 | 1 | 1 | 1 | 2 | 3 | 3 | 4 | 3 | |
Temp °C | 24 | 23 | 23 | 22 | 22 | 22 | 22 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 20 | 20 | 20 | 20 | 19 |
24 | 23 | 24 | 22 | 24 | 24 | 23 | 18 | 19 | 19 | 21 | 22 | 23 | 22 | 23 | 24 | 23 | 22 | 22 | 21 | 21 | 20 | 20 | 21 | |
Swell 1 Height (m) Direction Period (s) | S 10 | S 10 | S 10 | S 10 | S 10 | SW 5 | SSW 5 | S 9 | SSW 8 | SSW 8 | SSW 8 | SSW 8 | S 18 | S 16 | S 16 | S 15 | S 14 | S 14 | S 14 | S 13 | S 13 | S 13 | S 14 | S 15 |
 kJ | 123 | 121 | 90 | 89 | 64 | 30 | 26 | 79 | 234 | 284 | 253 | 245 | 1537 | 1812 | 2131 | 2906 | 2375 | 1914 | 1553 | 1408 | 976 | 976 | 1303 | 1699 |
Swell 2 Height (m) Direction Period (s) | E 7 | S 16 | S 16 | S 15 | SSW 5 | S 9 | S 9 | SW 5 | S 13 | S 13 | S 19 | S 18 | S 8 | S 8 | S 8 | — | — | SE 6 | SE 6 | E 8 | E 8 | E 7 | SE 6 | SE 6 |
| kJ | 4 | 21 | 45 | 72 | 15 | 62 | 42 | 14 | 54 | 50 | 362 | 520 | 239 | 270 | 228 | — | — | 46 | 30 | 5 | 1 | 4 | 36 | 30 |
Swell 3 Height (m) Direction Period (s) | S 17 | E 7 | E 7 | E 7 | S 15 | S 14 | S 14 | S 13 | S 16 | S 15 | S 15 | S 15 | SE 12 | SE 12 | — | — | — | E 8 | — | — | — | — | SE 6 | — |
| kJ | 22 | 4 | 4 | 4 | 68 | 103 | 92 | 55 | 45 | 72 | 104 | 267 | 6 | 6 | — | — | — | 5 | — | — | — | — | 36 | — |
Wind waves Height (m) Direction Period (s) | — | SW 2 | SW 3 | SW 4 | SW 5 | SW 5 | W 5 | WSW 5 | SW 8 | SSW 8 | — | — | — | — | — | — | — | — | — | SE 6 | SE 6 | SE 6 | — | — |
| kJ | — | 2 | 3 | 5 | 35 | 47 | 19 | 33 | 390 | 384 | — | — | — | — | — | — | — | — | — | 52 | 36 | 46 | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 48 | 102 | 102 | 48 | 20 | 108 | 108 | 210 | 210 | 133 | 48 | 20 | 5 | 48 | 5 | 0 | 48 | 48 | 121 | 0 | 0 | 19 | 34 | 12 |
Best forecast wave conditions in Rio de Janeiro | ||||||||||||||||||||||||
Best forecast wave conditions in Brazil | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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