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Cassino Surf Forecast
/ Rio Grande Do Sul (19 surf breaks) /
Surf Forecasts:
Cassino surfForecast / Rio Grande Do Sul / Brazil
48hr Weather and Surf, issued 8 pm Sunday 17 May 2026 -03Forecast update in hr min s Forecast update imminent
Cassino surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Cassino sea temperature is
15.7° C
(Which is 2.0°C colder than average for this time of year)How big are the waves at Cassino today?
The current surf forecast for Cassino at 3AM is: 1.4m 6s primary swell from a South direction and 0.2m 13s secondary swell from a South-southeast direction, 0.1m 7s secondary swell from a East direction (forecast issued at 08:00pm May 17). The wind direction is predicted to be cross-offshore.
| Time (-03) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (18 May) | 3.5ft (1.1m) | 6s |
| Afternoon (18 May) | 3.5ft (1.1m) | 10s |
| Evening (18 May) | 3.5ft (1.1m) | 13s |
Table - waves today at Cassino. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastMostly dry. Very mild (max 14°C on Tue afternoon, min 8°C on Tue morning). Wind will be generally light. | ||||||||||||||||||||||||
Sun 17 | Monday 18 | Tuesday 19 | Wednesday 20 | |||||||||||||||||||||
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 | 12 PM | 3 PM | |
Swell Height Map |    |    |    |    | ||||||||||||||||||||
S 5 | S 6 | S 6 | S 6 | S 6 | S 6 | S 9 | S 10 | S 10 | SSE 18 | SSE 17 | SSE 16 | SSE 15 | SSE 14 | SSE 14 | SSE 13 | SSE 13 | SSE 12 | SSE 12 | SSE 12 | SSE 12 | SSE 14 | SSE 14 | S 16 | |
90 | 139 | 159 | 134 | 71 | 89 | 162 | 234 | 452 | 437 | 980 | 978 | 833 | 668 | 497 | 367 | 280 | 252 | 248 | 313 | 373 | 613 | 742 | 3085 | |
Wind (km/h) | ||||||||||||||||||||||||
cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | off | off | off | off | off | off | off | off | off | off | off | off | off | cross-off | cross-off | |
High Tide | 3:03PM0.41m | 8:18PM0.58m | 9:25AM0.29m | 3:40PM0.39m | 9:14PM0.66m | 10:15AM0.28m | 4:19PM0.35m | 10:10PM0.71m | 11:04AM0.26m | |||||||||||||||
Low Tide | 4:50PM0.38m | 5:26AM-0.04m | 12:03PM0.18m | 5:23PM0.36m | 6:15AM-0.10m | 12:51PM0.17m | 6:00PM0.32m | 7:04AM-0.12m | 1:42PM0.15m | |||||||||||||||
 | | | | |  | |  |  | | | | | | | | | | | | | | | | |
 | — | — | — | — | 7:11 | — | — | — | — | — | — | — | 7:13 | — | — | — | — | — | — | — | 7:13 | — | — | — |
 | — | — | — | — | — | — | — | 5:37 | — | — | — | — | — | — | — | 5:37 | — | — | — | — | — | — | — | 5:36 |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Temp °C | 13 | 13 | 11 | 11 | 11 | 11 | 13 | 13 | 13 | 13 | 12 | 10 | 9 | 8 | 12 | 14 | 13 | 12 | 10 | 9 | 8 | 8 | 13 | 14 |
8 | 8 | 5 | 7 | 7 | 7 | 9 | 9 | 10 | 11 | 9 | 7 | 6 | 4 | 7 | 9 | 9 | 8 | 6 | 5 | 3 | 3 | 7 | 8 | |
Swell 1 Height (m) Direction Period (s) | E 12 | E 7 | E 7 | SSE 13 | SSE 8 | SE 16 | SE 15 | S 21 | S 10 | SSE 13 | SSE 17 | SSE 16 | SSE 15 | SSE 14 | SSE 14 | SSE 13 | SSE 13 | SSE 12 | SSE 12 | SSE 12 | SSE 12 | SSE 14 | SSE 14 | SSE 16 |
 kJ | 3 | 1 | 1 | 17 | 35 | 10 | 9 | 9 | 296 | 437 | 980 | 978 | 833 | 668 | 497 | 367 | 280 | 252 | 248 | 313 | 373 | 613 | 742 | 1589 |
Swell 2 Height (m) Direction Period (s) | E 7 | SE 12 | E 7 | E 7 | SE 16 | — | — | — | SSE 20 | SSE 19 | — | — | — | — | — | — | — | — | — | — | SSE 14 | — | — | — |
| kJ | 1 | 6 | 1 | 1 | 10 | — | — | — | 39 | 139 | — | — | — | — | — | — | — | — | — | — | 289 | — | — | — |
Swell 3 Height (m) Direction Period (s) | E 7 | E 7 | — | — | SE 12 | E 7 | — | E 7 | — | SSE 18 | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | 1 | 1 | — | — | 6 | 1 | — | 1 | — | 381 | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | S 5 | S 6 | S 6 | S 6 | S 6 | S 6 | S 9 | S 10 | S 10 | — | — | — | — | WSW 3 | W 3 | WSW 3 | WSW 3 | W 3 | W 3 | W 3 | WSW 4 | WSW 4 | WSW 4 | S 16 |
| kJ | 90 | 139 | 159 | 134 | 71 | 89 | 162 | 234 | 452 | — | — | — | — | 1 | 4 | 3 | 3 | 5 | 6 | 8 | 15 | 17 | 10 | 3085 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 515 | 320 | 224 | 210 | 224 | 210 | 235 | 210 | 9 | 9 | 9 | 210 | 210 | 236 | 236 | 236 | 210 | 9 | 9 | 235 | 235 | 235 | 293 | 293 |
Best forecast wave conditions in Rio Grande Do Sul | ||||||||||||||||||||||||
Best forecast wave conditions in Brazil | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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