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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 2 am Wednesday 20 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
15.3° C
(Which is 2.1°C colder than average for this time of year)How big are the waves at Cassino today?
The current surf forecast for Cassino at 6AM is: 1.1m 13s primary swell from a South-southeast direction and 0.7m 15s secondary swell from a South-southeast direction (forecast issued at 02:00am May 20). An open ocean swell of 0.7m 4s is not directed at the surf break. The wind direction is predicted to be offshore and the swell rating is 3.
| Time (-03) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (20 May) | 4.5ft (1.3m) | 14s |
| Afternoon (20 May) | 5.5ft (1.7m) | 16s |
| Evening (20 May) | 7ft (2.1m) | 15s |
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 16°C on Fri night, min 8°C on Wed morning). Wind will be generally light. | ||||||||||||||||||||||||
Wednesday 20 | Thursday 21 | Friday 22 | ||||||||||||||||||||||
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 | 6 PM | 9 PM | |
Swell Height Map |    |    |    | |||||||||||||||||||||
SSE 12 | SSE 12 | SSE 13 | SSE 14 | SSE 15 | SSE 16 | SSE 16 | SSE 15 | SSE 14 | SSE 14 | SSE 13 | SSE 13 | SSE 13 | SSE 16 | SSE 15 | SSE 14 | SSE 14 | SSE 14 | SSE 13 | SSE 13 | SSE 13 | SSE 13 | SSE 13 | SSE 12 | |
244 | 318 | 411 | 624 | 890 | 1428 | 1591 | 1873 | 2167 | 1803 | 1230 | 1110 | 852 | 1839 | 1557 | 1301 | 1247 | 1008 | 863 | 837 | 1336 | 1175 | 560 | 419 | |
Wind (km/h) | ||||||||||||||||||||||||
off | off | off | off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross | cross | cross | cross | cross | cross | cross | cross | cross-on | cross-on | |
High Tide | 11:04AM0.26m | 4:59PM0.30m | 11:05PM0.72m | 11:52AM0.25m | 5:44PM0.26m | 00:00AM0.69m | 12:41PM0.25m | 6:37PM0.23m | ||||||||||||||||
Low Tide | 7:04AM-0.12m | 1:42PM0.15m | 6:40PM0.27m | 7:54AM-0.10m | 2:37PM0.14m | 7:21PM0.23m | 8:46AM-0.05m | 3:35PM0.14m | 8:04PM0.21m | |||||||||||||||
 | | |  | | |  | | | | |  | | |  | | | | |  | | | | | |
 | — | — | 7:13 | — | — | — | — | — | — | — | 7:13 | — | — | — | — | — | — | — | 7:15 | — | — | — | — | — |
 | — | — | — | — | — | 5:36 | — | — | — | — | — | — | — | 5:36 | — | — | — | — | — | — | — | 5:35 | — | — |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Temp °C | 9 | 8 | 8 | 8 | 12 | 14 | 14 | 13 | 12 | 11 | 12 | 12 | 13 | 14 | 13 | 13 | 13 | 13 | 13 | 13 | 14 | 14 | 14 | 15 |
5 | 3 | 3 | 3 | 7 | 9 | 9 | 9 | 7 | 6 | 8 | 8 | 9 | 10 | 9 | 10 | 10 | 11 | 11 | 10 | 11 | 11 | 12 | 14 | |
Swell 1 Height (m) Direction Period (s) | SSE 12 | SSE 12 | SSE 13 | SSE 14 | SSE 15 | SSE 16 | SSE 16 | — | — | — | SSE 13 | SSE 13 | SSE 13 | SSE 16 | SSE 15 | SSE 14 | SSE 14 | SSE 14 | SSE 13 | SSE 13 | SSE 13 | SSE 13 | SSE 13 | SSE 12 |
 kJ | 244 | 318 | 411 | 624 | 890 | 1428 | 1591 | — | — | — | 1230 | 1110 | 852 | 1839 | 1557 | 1301 | 1247 | 1008 | 863 | 837 | 1336 | 1175 | 560 | 419 |
Swell 2 Height (m) Direction Period (s) | — | — | SSE 15 | — | — | — | — | — | — | — | — | SE 18 | SSE 17 | SSE 16 | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | 196 | — | — | — | — | — | — | — | — | 83 | 504 | 717 | — | — | — | — | — | — | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | W 3 | W 4 | W 4 | WSW 4 | WSW 4 | WSW 4 | — | SSE 15 | SSE 14 | SSE 14 | — | — | — | — | — | — | — | — | — | — | SSE 13 | SSE 13 | — | — |
| kJ | 8 | 9 | 13 | 15 | 11 | 13 | — | 1873 | 2167 | 1803 | — | — | — | — | — | — | — | — | — | — | 690 | 669 | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 9 | 9 | 210 | 224 | 515 | 293 | 293 | 336 | 293 | 336 | 336 | 235 | 9 | 235 | 235 | 235 | 235 | 235 | 235 | 235 | 420 | 515 | 385 | 286 |
Best forecast wave conditions in Rio Grande Do Sul | ||||||||||||||||||||||||
Best forecast wave conditions in Brazil | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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