Surf Forecasts:
Grumari surf forecast from 2 Aug 2026:
- Best quality surf: Wednesday 5 Aug, 12AM (local time) - 2.5ft (0.8m), 12s period, S swell with offshore winds.
- Most powerful swell: Wednesday 5 Aug, 9AM (local time) - 3.5ft (1.0m), 12s period, S swell with 266 kJ wave energy.
- Next surfable swell (1★+): Sunday 2 Aug, 3AM (local time) - 2.5ft (0.7m), 11s period with S swell.
Best Forecast Surf Conditions for Grumari this week:
The surf forecast for Grumari over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Sunday (Aug 02) at 3AM. The primary swell is predicted to be 0.7m and 11s period. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Grumari in the next 16 days are 1.0m 12s and forecast to arrive on Wednesday (Aug 05) at 9AM. Winds are predicted to be offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.6m 7s period and expected on Sunday (Aug 02) at 3AM.
| Wave Type | Time (-03) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 3AM (Sun 2nd Aug) | 2.5ft (0.7m) 11s |
| Best Surf | 12AM (Wed 5th Aug) | 2.5ft (0.8m) 12s |
| Most Powerful | 9AM (Wed 5th Aug) | 3.5ft (1.0m) 12s |
Table - best surf conditions forecast for Grumari over the next 16 days.
Short Range ForecastMostly dry. Warm (max 29°C on Tue afternoon, min 18°C on Sat night). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Warm (max 34°C on Fri afternoon, min 21°C on Wed night). Wind will be generally light. | ||||||||||||||||||
Sunday 2 | Monday 3 | Tuesday 4 | Wednesday 5 | Thursday 6 | Friday 7 | ||||||||||||||
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) | S 11 | S 10 | SSW 10 | S 10 | SE 13 | ESE 6 | SE 11 | S 13 | S 13 | S 12 | S 12 | S 11 | S 11 | S 10 | SSE 10 | SW 5 | SSE 12 | ESE 8 | S 10 |
Wave Graph  | |||||||||||||||||||
 kJ | 146 | 75 | 32 | 16 | 26 | 55 | 61 | 55 | 87 | 187 | 266 | 233 | 144 | 96 | 33 | 59 | 49 | 66 | 53 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | cross-on | off | off | cross-on | off | cross-off | cross-on | off | off | cross-on | glassy | cross-off | cross-on | off | off | cross-on | cross-off |
High Tide | 4:29AM1.17m | 5:10PM1.06m | 5:07AM1.13m | 5:42PM1.00m | 5:49AM1.06m | 6:19PM0.92m | 6:41AM0.96m | 7:03PM0.82m | 7:57AM0.86m | 8:05PM0.73m | 12:00PM0.87m | 10:17PM0.69m | |||||||
Low Tide | 11:12PM0.31m | 11:35AM0.09m | 11:50PM0.33m | 12:18PM0.18m | 00:33AM0.36m | 1:09PM0.30m | 1:27AM0.39m | 2:18PM0.41m | 2:39AM0.41m | 3:51PM0.50m | 4:09AM0.38m | 5:34PM0.50m | |||||||
 |  | | | | | | | |  |  | | | | | | | | | |
 | — | 6:28 | — | — | 6:26 | — | — | 6:26 | — | — | 6:26 | — | — | 6:24 | — | — | 6:24 | — | — |
 | — | — | 5:31 | — | — | 5:32 | — | — | 5:32 | — | — | 5:34 | — | — | 5:34 | — | — | 5:34 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 22 | 26 | 26 | 23 | 25 | 24 | 21 | 27 | 29 | 25 | 28 | 24 | 22 | 29 | 28 | 24 | 32 | 34 | 29 |
Feels °C | 21 | 26 | 24 | 24 | 25 | 23 | 23 | 26 | 27 | 24 | 27 | 24 | 23 | 29 | 27 | 26 | 31 | 34 | 29 |
Swell 1 Height (m) Direction Period (s) | E 6 | E 7 | SSW 10 | E 7 | E 7 | ESE 6 | ESE 7 | E 7 | S 13 | E 7 | E 8 | S 11 | E 8 | E 8 | E 7 | E 7 | E 8 | SSE 11 | E 4 |
| kJ | 182 | 86 | 32 | 89 | 72 | 55 | 82 | 106 | 87 | 131 | 138 | 233 | 117 | 90 | 69 | 53 | 55 | 42 | 13 |
Swell 2 Height (m) Direction Period (s) | S 11 | S 10 | SE 8 | S 10 | SE 13 | SE 12 | SE 11 | SE 10 | SE 10 | S 12 | S 12 | E 8 | S 11 | S 10 | SSW 9 | SSW 9 | S 5 | SSW 10 | S 10 |
| kJ | 146 | 75 | 2 | 16 | 26 | 52 | 61 | 52 | 35 | 187 | 266 | 95 | 144 | 96 | 29 | 28 | 22 | 19 | 53 |
Swell 3 Height (m) Direction Period (s) | E 10 | SSE 9 | — | S 8 | S 9 | S 10 | S 15 | S 13 | SW 6 | SE 9 | — | — | — | S 16 | SSE 10 | SSE 13 | SSE 12 | SSW 10 | E 7 |
| kJ | 2 | 8 | — | 1 | 7 | 2 | 17 | 55 | 1 | 29 | — | — | — | 5 | 33 | 59 | 49 | 19 | 9 |
Wind waves Height (m) Direction Period (s) | — | — | E 7 | E 7 | — | — | E 7 | — | E 7 | — | — | — | — | N 3 | — | SW 5 | — | ESE 8 | — |
| kJ | — | — | 70 | 173 | — | — | 127 | — | 83 | — | — | — | — | 1 | — | 59 | — | 66 | — |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 0 | 0 | 85 | 2 | 2 | 85 | 0 | 0 | 5 | 0 | 0 | 82 | 0 | 0 | 45 | 0 | 0 | 2 | 0 |
Best forecast wave conditions in Rio de Janeiro | |||||||||||||||||||
Best forecast wave conditions in Brazil | |||||||||||||||||||
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The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Grumari surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.
Information about the Grumari Surf forecast
The above surf forecast table for Grumari provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Grumari can be found by selecting the local surf guide option on the grey menu. Our Grumari 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 (Grumari) 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 Grumari 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.
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