Surf Forecasts:
Grumari surf forecast from 31 Oct 2026:
- Best quality surf: Monday 2 Nov, 12AM (local time) - 5ft (1.6m), 6s period, ESE swell with cross-offshore winds.
- Most powerful swell: Monday 2 Nov, 12AM (local time) - 5ft (1.6m), 6s period, ESE swell with 194 kJ wave energy.
- Next surfable swell (1★+): Saturday 31 Oct, 6PM (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 Saturday (Oct 31) at 6PM. The primary swell is predicted to be 0.7m and 11s period with a secondary swell of 0.8m and 7s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Grumari in the next 16 days are 1.6m 6s and forecast to arrive on Monday (Nov 02) at 12AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.6m 7s period and expected on Monday (Nov 02) at 6AM.
| Wave Type | Time (-03) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6PM (Sat 31st Oct) | 2.5ft (0.7m) 11s |
| Best Surf | 12AM (Mon 2nd Nov) | 5ft (1.6m) 6s |
| Most Powerful | 12AM (Mon 2nd Nov) | 5ft (1.6m) 6s |
Table - best surf conditions forecast for Grumari over the next 16 days.
Short Range ForecastLight rain (total 9mm), mostly falling on Sun afternoon. Warm (max 28°C on Mon morning, min 21°C on Sat night). Wind will be generally light. | Days 4-6 Weather SummaryModerate rain (total 16mm), heaviest on Thu afternoon. Warm (max 32°C on Wed morning, min 22°C on Thu night). Wind will be generally light. | ||||||||||||||||||||
Saturday 31 | Sunday 1 | Monday 2 | Tuesday 3 | Wednesday 4 | Thursday 5 | Friday 6 | |||||||||||||||
AM | PM | 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 11 | S 10 | S 10 | S 10 | ESE 6 | ESE 7 | ESE 7 | ESE 7 | ESE 7 | ESE 8 | ESE 8 | ESE 8 | SE 8 | ESE 7 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | S 6 | ESE 5 |
Wave Graph  | |||||||||||||||||||||
 kJ | 237 | 146 | 96 | 92 | 66 | 194 | 178 | 163 | 132 | 108 | 128 | 127 | 81 | 77 | 62 | 64 | 58 | 63 | 47 | 38 | 25 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-on | cross | cross | cross-on | cross-off | cross-off | cross | cross-off | cross-off | cross-on | cross-off | cross-off | on | glassy | glassy | cross-on | cross-off | glassy | cross | cross |
High Tide | 5:20PM0.84m | 11:17AM0.87m | 6:22PM0.78m | 12:01PM0.91m | 8:27PM0.76m | 12:29PM0.94m | 11:10PM0.85m | 12:44PM0.96m | 11:57PM0.95m | 12:52PM0.98m | 00:35AM1.04m | 1:04PM1.01m | 1:10AM1.10m | ||||||||
Low Tide | 1:51PM0.66m | 1:58AM0.28m | 3:15PM0.67m | 3:24AM0.28m | 4:31PM0.62m | 4:40AM0.25m | 5:28PM0.53m | 5:41AM0.21m | 6:12PM0.43m | 6:30AM0.18m | 6:50PM0.33m | 7:12AM0.17m | 7:25PM0.23m | ||||||||
 | |  | |  |  |  | | | | |  | | | |  |  | | | | | |
 | 5:09 | — | — | 5:09 | — | — | 5:07 | — | — | 5:07 | — | — | 5:07 | — | — | 5:05 | — | — | 5:05 | — | — |
 | — | 6:06 | — | — | 6:06 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | 6:08 | — |
mm | — | — | — | — | 2 | 2 | 1 | 3 | 1 | — | — | — | — | 2 | 2 | — | 7 | 5 | 6 | 1 | 5 |
Temp °C | 23 | 23 | 22 | 26 | 25 | 22 | 28 | 23 | 23 | 28 | 25 | 23 | 32 | 29 | 25 | 29 | 24 | 23 | 23 | 23 | 23 |
Feels °C | 24 | 24 | 24 | 26 | 25 | 23 | 31 | 25 | 26 | 29 | 26 | 26 | 36 | 32 | 29 | 32 | 26 | 27 | 28 | 27 | 26 |
Swell 1 Height (m) Direction Period (s) | S 11 | SSE 7 | SE 7 | ESE 6 | S 10 | S 9 | ESE 7 | ESE 7 | ESE 7 | ESE 7 | ESE 8 | ESE 8 | ESE 8 | SE 8 | ESE 7 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | S 6 | SSW 6 |
| kJ | 237 | 79 | 65 | 51 | 66 | 58 | 178 | 163 | 132 | 108 | 128 | 127 | 81 | 77 | 62 | 64 | 58 | 63 | 47 | 38 | 15 |
Swell 2 Height (m) Direction Period (s) | SE 7 | S 11 | S 10 | S 10 | S 15 | S 14 | S 9 | S 8 | S 8 | S 8 | S 8 | S 8 | SE 9 | E 7 | W 4 | WSW 4 | WSW 3 | WSW 5 | SW 5 | E 8 | ESE 7 |
| kJ | 12 | 146 | 96 | 92 | 4 | 4 | 37 | 35 | 22 | 22 | 12 | 11 | 22 | 52 | 7 | 1 | 2 | 10 | 5 | 29 | 18 |
Swell 3 Height (m) Direction Period (s) | E 7 | E 7 | E 7 | E 9 | — | — | S 13 | S 13 | — | — | — | — | S 8 | S 7 | SE 9 | SE 7 | SE 7 | SE 7 | SSW 7 | SE 13 | SE 12 |
| kJ | 8 | 8 | 8 | 2 | — | — | 3 | 3 | — | — | — | — | 5 | 1 | 13 | 2 | 2 | 2 | 5 | 6 | 5 |
Wind waves Height (m) Direction Period (s) | SW 5 | — | — | — | ESE 4 | ESE 6 | E 7 | E 7 | — | — | — | — | NE 3 | — | W 4 | — | — | — | — | SE 4 | ESE 5 |
| kJ | 23 | — | — | — | 52 | 194 | 243 | 269 | — | — | — | — | 2 | — | 4 | — | — | — | — | 5 | 25 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 2 | 82 | 5 | 5 | 140 | 0 | 0 | 2 | 0 | 0 | 140 | 0 | 0 | 49 | 0 | 0 | 171 | 6 | 0 | 8 | 8 |
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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