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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 Monday 31 Mar 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 Tuesday (Apr 01) at 12AM. The primary swell is predicted to be 0.8m and 9s period with a secondary swell of 0.6m and 10s. Another secondary swell of 0.6m and 4s 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 2.2m 14s and forecast to arrive on Sunday (Apr 06) at 9AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.5m 6s period and expected on Wednesday (Apr 02) at 9PM.
| Wave Type | Time (-03) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 12AM (Tue 1st Apr) | 2.5ft (0.8m) 9s |
| Best Surf | 9AM (Fri 4th Apr) | 2.5ft (0.7m) 14s |
| Most Powerful | 9AM (Sun 6th Apr) | 7ft (2.2m) 14s |
Table - best surf conditions forecast for Grumari over the next 12 days.
Mon 31 | Tuesday 01 | Wednesday 02 | Thursday 03 | Friday 04 | Saturday 05 | Sunday 06 | Monday 07 | Tuesday 08 | Wednesday 09 | Thursday 10 | Friday 11 | Sat 12 | ||||||||||||||||||||||||
| PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | 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 | 8 | 8 | 6 | 6 | 6 | 10 | 9 | 8 | 16 | 14 | 13 | 8 | 9 | 9 | 9 | 14 | 13 | 12 | 12 | 11 | 10 | 10 | 10 | 11 | 10 | 9 | 10 | 9 | 9 | 10 | 9 | 11 | 11 | 11 |
Wave (?)Graph  | ||||||||||||||||||||||||||||||||||||
| Energy (?) | 108 | 101 | 113 | 128 | 74 | 95 | 66 | 16 | 15 | 23 | 125 | 200 | 350 | 742 | 792 | 1157 | 1041 | 1867 | 1538 | 988 | 773 | 599 | 477 | 327 | 370 | 337 | 267 | 287 | 154 | 256 | 184 | 622 | 147 | 229 | 916 | 764 |
Wind (km/h) | ||||||||||||||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- on | glass | glass | cross- on | cross | cross- off | cross- on | cross- off | off | cross- on | cross | cross- off | cross- on | on | on | on | on | cross- on | cross- on | cross- on | cross | cross- on | glass | glass | cross- on | cross- off | cross- off | cross | off | cross- off | cross- on | off | cross- off | glass | glass | cross- off |
High Tide / height (m) | 4:00PM 1.23 | 4:02AM 1.01 | 4:38PM 1.14 | 4:25AM 0.95 | 5:20PM 1.00 | 4:51AM 0.90 | 6:11PM 11:05PM 0.86 0.74 | 5:19AM 0.83 | 7:42PM 12:21AM 0.73 0.83 | 5:57AM 0.76 | 12:55AM 0.89 | 8:00AM 0.68 | 1:15AM 0.94 | 11:57AM 0.79 | 1:26AM 0.98 | 12:30PM 0.92 | 1:34AM 1.02 | 1:00PM 1.02 | 1:46AM 1.06 | 1:30PM 1.11 | 2:03AM 1.09 | 1:59PM 1.17 | 2:23AM 1.10 | |||||||||||||
Low Tide / height (m) | 11:05PM 0.25 | 10:56AM 0.16 | 11:46PM 0.42 | 11:32AM 0.20 | 12:34AM 0.58 | 12:20PM 0.27 | 9:47PM 1:50AM 0.73 0.70 | 1:52PM 0.34 | 8:36PM 0.73 | 3:51AM 0.73 | 3:46PM 0.36 | 5:41AM 0.66 | 5:18PM 0.30 | 6:25AM 0.56 | 6:19PM 0.22 | 6:57AM 0.46 | 7:02PM 0.15 | 7:27AM 0.37 | 7:38PM 0.11 | 7:55AM 0.29 | 8:10PM 0.09 | 8:21AM 0.23 | 8:39PM 0.10 | 8:46AM 0.18 | ||||||||||||
Mon 31 | Tuesday 01 | Wednesday 02 | Thursday 03 | Friday 04 | Saturday 05 | Sunday 06 | Monday 07 | Tuesday 08 | Wednesday 09 | Thursday 10 | Friday 11 | Sat 12 | ||||||||||||||||||||||||
| Sunrise | - | - | 6:01 | - | - | 6:01 | - | - | 6:01 | - | - | 6:03 | - | - | 6:03 | - | - | 6:03 | - | - | 6:03 | - | - | 6:03 | - | - | 6:03 | - | - | 6:05 | - | - | 6:05 | - | - | 6:05 |
| Sunset | 5:53 | - | - | 5:52 | - | - | 5:52 | - | - | 5:51 | - | - | 5:50 | - | - | 5:50 | - | - | 5:49 | - | - | 5:47 | - | - | 5:46 | - | - | 5:45 | - | - | 5:45 | - | - | 5:44 | - | - |
 |  | |  |  | | |  | |  |  | | | |  |  |  |  | |  |  | | | | | | | | | | | | | | | | |
Rain (mm) | - | - | - | - | 1 | - | - | - | - | 1 | 7 | 4 | 5 | 15 | 16 | 9 | 4 | 2 | 1 | 4 | 1 | - | - | - | - | - | - | - | 3 | - | 2 | 2 | - | 2 | 1 | - |
| Temp. °C | 27 | 25 | 30 | 27 | 26 | 30 | 29 | 27 | 31 | 28 | 26 | 26 | 26 | 25 | 23 | 23 | 23 | 23 | 23 | 23 | 24 | 24 | 22 | 24 | 24 | 23 | 26 | 28 | 24 | 28 | 28 | 23 | 28 | 27 | 24 | 28 |
| Feels °C (?) | 28 | 28 | 32 | 29 | 30 | 32 | 30 | 30 | 32 | 30 | 29 | 28 | 28 | 28 | 24 | 21 | 23 | 22 | 22 | 23 | 23 | 23 | 23 | 25 | 23 | 23 | 26 | 27 | 26 | 31 | 29 | 26 | 31 | 30 | 27 | 31 |
Short Range Forecast: Some drizzle, heaviest during Tue night. Warm (max 31°C on Thu morning, min 24°C on Tue night). Wind will be generally light. | Days 3-6 Weather Summary Heavy rain (total 63mm), heaviest during Sat morning. Warm (max 28°C on Thu afternoon, min 22°C on Sat morning). Wind will be generally light. | Days 6-9 Weather Summary Light rain (total 6mm), mostly falling on Sun afternoon. Warm (max 26°C on Wed morning, min 19°C on Mon night). Wind will be generally light. | Long Range Forecast: Moderate rain (total 10mm), heaviest on Wed night. Warm (max 28°C on Wed afternoon, min 21°C on Wed night). Wind will be generally light. | |||||||||||||||||||||||||||||||||
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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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