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Grumari Surf Forecast
/ Rio de Janeiro (47 surf breaks) /
Surf Forecasts:
Grumari surfForecast / Rio de Janeiro / Brazil
12 Day Weather and Surf, issued 2 pm Saturday 01 Nov 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 Sunday (Nov 02) at 12AM. The primary swell is predicted to be 0.8m and 9s period with a secondary swell of 0.6m and 11s. Another secondary swell of 1.0m and 6s is also forecast. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Grumari in the next 12 days are 3.5m 10s and forecast to arrive on Saturday (Nov 08) at 9PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.8m 6s period and expected on Friday (Nov 07) at 6PM.
| Wave Type | Time (-03) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 12AM (Sun 2nd Nov) | 2.5ft (0.8m) 9s |
| Best Surf | 6PM (Sat 8th Nov) | 11ft (3.5m) 9s |
| Most Powerful | 9PM (Sat 8th Nov) | 11ft (3.5m) 10s |
Table - best surf conditions forecast for Grumari over the next 12 days.
Short Range Forecast Moderate rain (total 19mm), heaviest on Sun afternoon. Warm (max 26°C on Sun morning, min 21°C on Sat night). Wind will be generally light. | Days 3-6 Weather Summary Moderate rain (total 13mm), heaviest on Tue afternoon. Warm (max 30°C on Wed morning, min 20°C on Thu night). Wind will be generally light. | ||||||||||||||||||||||
Sat 01 | Sunday 02 | Monday 03 | Tuesday 04 | Wednesday 05 | Thursday 06 | Friday 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) (?) | 8 | 9 | 10 | 9 | 7 | 10 | 9 | 9 | 10 | 9 | 20 | 14 | 12 | 15 | 13 | 13 | 14 | 12 | 12 | 14 | 13 | ||
Wave (?)Graph  | |||||||||||||||||||||||
 kJ (?) | 111 | 118 | 74 | 227 | 225 | 31 | 29 | 29 | 18 | 17 | 30 | 94 | 199 | 743 | 824 | 775 | 733 | 1354 | 734 | 880 | 643 | ||
Wind (km/h) | |||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- on | glass | glass | cross- on | glass | glass | cross | cross- off | glass | on | glass | off | on | cross | cross | cross- on | cross | cross | cross | cross- off | off | ||
High Tide / height (m) | 12:20AM 1.04 | 1:12PM 1.12 | 12:58AM 1.14 | 1:36PM 1.11 | 1:36AM 1.22 | 1:59PM 1.08 | 2:15AM 1.25 | 2:22PM 1.05 | 2:54AM 1.25 | 2:46PM 1.01 | 3:34AM 1.19 | 3:13PM 0.98 | 4:16AM 1.10 | ||||||||||
Low Tide / height (m) | 6:34PM 0.33 | 6:49AM 0.05 | 7:14PM 0.24 | 7:36AM 0.03 | 7:52PM 0.17 | 8:21AM 0.05 | 8:29PM 0.11 | 9:05AM 0.12 | 9:05PM 0.06 | 9:49AM 0.23 | 9:43PM 0.05 | 10:34AM 0.37 | 10:24PM 0.07 | 11:20AM 0.50 | |||||||||
Sat 01 | Sunday 02 | Monday 03 | Tuesday 04 | Wednesday 05 | Thursday 06 | Friday 07 | |||||||||||||||||
| Sunrise | - | - | 5:07 | - | - | 5:07 | - | - | 5:07 | - | - | 5:05 | - | - | 5:05 | - | - | 5:05 | - | - | 5:05 | ||
| Sunset | 6:06 | - | - | 6:07 | - | - | 6:07 | - | - | 6:07 | - | - | 6:07 | - | - | 6:08 | - | - | 6:09 | - | - | ||
 |  |  |  | |  |  |  | | |  | |  | |  | |  | | | | | |||
Rain (mm) | - | 1 | 1 | 11 | 5 | - | 1 | - | - | 9 | 2 | - | - | 1 | 1 | - | - | - | - | - | - | ||
| Temp. °C | 23 | 21 | 26 | 22 | 22 | 25 | 23 | 22 | 26 | 24 | 22 | 30 | 27 | 23 | 22 | 22 | 21 | 28 | 26 | 28 | 31 | ||
| Feels °C (?) | 23 | 22 | 28 | 24 | 26 | 28 | 25 | 25 | 28 | 26 | 25 | 33 | 29 | 26 | 23 | 23 | 22 | 29 | 26 | 27 | 29 | ||
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Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
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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