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Grumari Surf Forecast
/ Rio de Janeiro (47 surf breaks) /
Grumari surfForecast / Rio de Janeiro / Brazil
12 Day Weather and Surf, issued 2 pm Friday 01 Aug 2025 -03
Best Forecast Surf Conditions for Grumari this week:
The surf forecast for Grumari over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Saturday (Aug 02) at 12AM. The primary swell is predicted to be 1.5m and 11s period with a secondary swell of 1.3m and 5s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Grumari in the next 12 days are 2.0m 15s and forecast to arrive on Thursday (Aug 07) at 12AM. Winds are predicted to be glassy at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.8m 7s period and expected on Monday (Aug 04) at 12AM.
| Wave Type | Time (-03) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 12AM (Sat 2nd Aug) | 5ft (1.5m) 11s |
| Best Surf | 9PM (Wed 6th Aug) | 5ft (1.5m) 12s |
| Most Powerful | 12AM (Thu 7th Aug) | 6.5ft (2.0m) 15s |
Table - best surf conditions forecast for Grumari over the next 12 days.
Short Range Forecast Mostly dry. Warm (max 28°C on Sun afternoon, min 17°C on Fri night). Wind will be generally light. | Days 3-6 Weather Summary Light rain (total 3mm), mostly falling on Tue night. Warm (max 25°C on Mon afternoon, min 18°C on Mon night). Wind will be generally light. | ||||||||||||||||||||||
Fri 01 | Saturday 02 | Sunday 03 | Monday 04 | Tuesday 05 | Wednesday 06 | Thursday 07 | |||||||||||||||||
| PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | |||
Rating (10 max) | |||||||||||||||||||||||
Swell Height Map |  |  |  |  |  |  |  |  | |||||||||||||||
| Wave Height (m) & direction (?) | |||||||||||||||||||||||
| Period(s) (?) | 11 | 11 | 11 | 10 | 10 | 10 | 9 | 9 | 9 | 9 | 4 | 13 | 14 | 12 | 11 | 9 | 15 | 14 | 13 | 13 | 12 | ||
Wave (?)Graph  | |||||||||||||||||||||||
| Energy (?) | 910 | 605 | 469 | 285 | 151 | 86 | 63 | 49 | 34 | 22 | 19 | 45 | 180 | 301 | 322 | 613 | 1892 | 1184 | 1040 | 1069 | 778 | ||
Wind (km/h) | |||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- on | cross- off | cross- off | cross- on | cross- off | cross- off | cross | cross- off | off | on | cross | cross- off | cross | cross | cross | cross- on | glass | glass | cross- on | cross- off | cross- off | ||
High Tide / height (m) | 7:10PM 0.79 | 8:27AM 0.78 | 8:15PM 0.73 | 11:44AM 0.80 | 10:50PM 0.71 | 12:51PM 0.89 | 12:16AM 0.78 | 1:32PM 0.98 | 1:01AM 0.86 | 2:07PM 1.07 | 1:36AM 0.95 | 2:37PM 1.13 | 2:06AM 1.04 | ||||||||||
Low Tide / height (m) | 2:33AM 0.43 | 3:35PM 0.56 | 4:04AM 0.42 | 5:25PM 0.56 | 5:32AM 0.36 | 6:42PM 0.50 | 6:36AM 0.26 | 7:30PM 0.43 | 7:26AM 0.16 | 8:08PM 0.36 | 8:08AM 0.06 | 8:43PM 0.32 | 8:48AM -0.02 | ||||||||||
Fri 01 | Saturday 02 | Sunday 03 | Monday 04 | Tuesday 05 | Wednesday 06 | Thursday 07 | |||||||||||||||||
| Sunrise | - | - | 6:28 | - | - | 6:26 | - | - | 6:26 | - | - | 6:26 | - | - | 6:24 | - | - | 6:24 | - | - | 6:24 | ||
| Sunset | 5:31 | - | - | 5:31 | - | - | 5:32 | - | - | 5:32 | - | - | 5:34 | - | - | 5:34 | - | - | 5:34 | - | - | ||
 |  | | | | | | | |  |  | |  |  |  | | | | | | | |||
Rain (mm) | - | - | - | - | - | - | - | - | - | - | - | - | - | 1 | 2 | - | - | - | - | - | - | ||
| Temp. °C | 21 | 19 | 23 | 25 | 21 | 26 | 28 | 25 | 26 | 25 | 19 | 20 | 20 | 21 | 20 | 20 | 19 | 22 | 23 | 20 | 20 | ||
| Feels °C (?) | 19 | 18 | 22 | 22 | 20 | 25 | 26 | 24 | 25 | 24 | 20 | 19 | 20 | 22 | 21 | 20 | 21 | 22 | 23 | 22 | 19 | ||
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Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
Recent Eyeball Surf Reports for Rio de Janeiro
The wind is still cross-on at Grumari (light winds from the ESE at Jacarepagua Airport 19 km from Grumari). A 1.7m groundswell from the SSE
19 km away, 1 h 36 min ago
FREE! Surf-Forecast.com widget for your website
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 12 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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