Surf Forecasts:
Grumari surf forecast from 17 Jun 2026:
- Best quality surf: Thursday 18 Jun, 6PM (local time) - 7ft (2.1m), 13s period, S swell with glassy winds.
- Most powerful swell: Friday 19 Jun, 3AM (local time) - 7ft (2.2m), 13s period, S swell with 1,736 kJ wave energy.
- Next surfable swell (1★+): Thursday 18 Jun, 6PM (local time) - 7ft (2.1m), 13s 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 Thursday (Jun 18) at 6PM. The primary swell is predicted to be 2.1m and 13s period with a secondary swell of 0.4m and 8s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Grumari in the next 16 days are 2.2m 13s and forecast to arrive on Friday (Jun 19) at 3AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.5m 7s period and expected on Saturday (Jun 20) at 12AM.
| Wave Type | Time (-03) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6PM (Thu 18th Jun) | 7ft (2.1m) 13s |
| Best Surf | 6PM (Thu 18th Jun) | 7ft (2.1m) 13s |
| Most Powerful | 3AM (Fri 19th Jun) | 7ft (2.2m) 13s |
Table - best surf conditions forecast for Grumari over the next 16 days.
Updates in hr min s Forecast update imminent
Short Range ForecastMostly dry. Warm (max 24°C on Sat morning, min 16°C on Thu night). Wind will be generally light. | Days 5-7 Weather SummarySome drizzle, heaviest during Sun morning. Warm (max 24°C on Mon afternoon, min 19°C on Sat night). Wind will be generally light. | ||||||||||||||||||||
Wed 17 | Thursday 18 | Friday 19 | Saturday 20 | Sunday 21 | Monday 22 | Tuesday 23 | |||||||||||||||
PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | |
Swell Height Map |  |  |  |  |  |  |  |  | |||||||||||||
Wave Height (m) Direction Period (s) | S 11 | SSW 11 | S 15 | S 14 | S 13 | S 13 | S 13 | S 13 | S 12 | S 12 | S 11 | S 11 | SW 6 | SSW 9 | SSW 9 | SSW 9 | SSW 8 | S 12 | SSE 16 | SSE 15 | SSE 13 |
Wave Graph  | |||||||||||||||||||||
 kJ | 576 | 495 | 422 | 1422 | 1584 | 1632 | 1704 | 986 | 423 | 339 | 155 | 112 | 114 | 333 | 248 | 211 | 72 | 228 | 302 | 263 | 222 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross | cross-on | cross-off | cross-off | cross | cross-off | cross-off | cross | cross-off | cross-off | cross-on | glassy | glassy | cross-on | cross-off | cross-off | cross-on | cross | cross-on |
High Tide | 4:58PM1.03m | 4:07AM1.03m | 5:38PM0.96m | 4:50AM1.02m | 6:18PM0.89m | 5:37AM0.99m | 7:02PM0.83m | 6:32AM0.94m | 7:54PM0.80m | 7:42AM0.88m | 8:58PM0.79m | 9:20AM0.84m | 10:09PM0.79m | 11:07AM0.85m | |||||||
Low Tide | 11:39PM0.51m | 11:49AM0.05m | 00:20AM0.55m | 12:38PM0.13m | 1:03AM0.56m | 1:30PM0.22m | 1:51AM0.55m | 2:25PM0.31m | 2:48AM0.53m | 3:25PM0.39m | 3:52AM0.48m | 4:31PM0.44m | 4:57AM0.41m | ||||||||
 |  |  | | | | | | | |  |  | | | | | | |  |  |  | |
 | — | — | 6:33 | — | — | 6:33 | — | — | 6:33 | — | — | 6:33 | — | — | 6:33 | — | — | 6:33 | — | — | 6:33 |
 | 5:15 | — | — | 5:15 | — | — | 5:15 | — | — | 5:16 | — | — | 5:16 | — | — | 5:16 | — | — | 5:16 | — | 5:17 |
mm | — | — | — | — | — | — | — | — | — | — | — | 1 | — | — | — | — | — | — | 2 | 23 | 2 |
Temp °C | 20 | 20 | 21 | 20 | 19 | 21 | 23 | 21 | 24 | 22 | 20 | 21 | 21 | 20 | 23 | 24 | 22 | 22 | 22 | 20 | 19 |
Feels °C | 19 | 19 | 20 | 19 | 19 | 20 | 21 | 20 | 24 | 21 | 22 | 21 | 21 | 22 | 25 | 24 | 24 | 23 | 23 | 20 | 18 |
Swell 1 Height (m) Direction Period (s) | S 11 | SSW 11 | SSW 11 | S 14 | S 13 | S 13 | S 13 | S 13 | S 12 | S 12 | S 11 | E 7 | E 9 | SSW 9 | SSW 9 | SSW 9 | SSW 8 | S 12 | SSW 12 | S 11 | S 8 |
| kJ | 576 | 495 | 392 | 1422 | 1584 | 1632 | 1704 | 986 | 423 | 339 | 155 | 66 | 87 | 333 | 248 | 211 | 72 | 228 | 224 | 143 | 212 |
Swell 2 Height (m) Direction Period (s) | ESE 8 | E 9 | S 15 | ESE 8 | ESE 8 | E 9 | E 10 | ESE 7 | ESE 7 | ESE 7 | E 7 | S 11 | S 10 | E 10 | E 10 | E 9 | E 4 | E 9 | E 9 | SSE 15 | SSE 13 |
| kJ | 55 | 42 | 422 | 24 | 24 | 24 | 31 | 121 | 82 | 67 | 51 | 112 | 74 | 68 | 45 | 43 | 13 | 79 | 73 | 263 | 222 |
Swell 3 Height (m) Direction Period (s) | S 19 | S 17 | ESE 9 | — | — | E 10 | — | E 9 | E 9 | E 10 | E 10 | E 7 | SE 9 | S 8 | SE 8 | SE 7 | E 9 | SSW 5 | SSE 16 | E 9 | SSE 15 |
| kJ | 29 | 140 | 26 | — | — | 19 | — | 28 | 27 | 32 | 50 | 32 | 20 | 28 | 3 | 14 | 41 | 15 | 302 | 55 | 172 |
Wind waves Height (m) Direction Period (s) | — | SSW 5 | — | — | — | — | ESE 6 | E 7 | — | — | WSW 4 | WSW 4 | SW 6 | — | — | — | — | — | — | — | — |
| kJ | — | 27 | — | — | — | — | 66 | 192 | — | — | 35 | 13 | 114 | — | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 153 | 82 | 2 | 122 | 0 | 0 | 6 | 0 | 0 | 141 | 0 | 0 | 159 | 0 | 0 | 5 | 0 | 0 | 153 | 2 | 157 |
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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