Grumari Surf Forecast

/ Rio de Janeiro (47 surf breaks) /

Brazil (447 surf breaks) / Lat Long: (23.05° S 43.53° W)

Surf Forecasts:

Grumari surfForecast / Rio de Janeiro / Brazil

12 Day Weather and Surf, issued 8 am Tuesday 16 Sep 2025 -03

Forecast update in hr min s Forecast update imminent

Grumari surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.

Today's Grumari sea temperature is 22.2° C
(Which is slightly warmer than usual)

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 (Sep 16) at 6PM. The primary swell is predicted to be 2.0m and 13s period. 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 13s and forecast to arrive on Tuesday (Sep 16) at 6PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 3.0m 8s period and expected on Friday (Sep 19) at 9PM.

Wave Type	Time (-03) & Date	Wave Height & Period
Next good surf (1 star+)	6PM (Tue 16th Sep)	6.5ft (2.0m) 13s
Best Surf	6PM (Tue 16th Sep)	6.5ft (2.0m) 13s
Most Powerful	6PM (Tue 16th Sep)	6.5ft (2.0m) 13s

Table - best surf conditions forecast for Grumari over the next 12 days.

Updates in hr min s Forecast update imminent

12 Days Hourly

Print Table

	Short Range Forecast Light rain (total 2mm), mostly falling on Tue afternoon. Warm (max 27°C on Tue morning, min 19°C on Wed night). Wind will be generally light.									Days 3-6 Weather Summary Mostly dry. Warm (max 36°C on Sun morning, min 23°C on Fri night). Wind will be generally light.
	Tuesday 16			Wednesday 17			Thursday 18			Friday 19			Saturday 20			Sunday 21			Monday 22
	AM	PM	Night	AM	PM	Night	AM	PM	Night	AM	PM	Night	AM	PM	Night	AM	PM	Night	AM	PM	Night
Rating (10 max)	3	2	3	2	1	2	2	0	1	1	0	0	0	0	0	0	0	1	1	1	2
Swell Height Map See all maps
Wave Height (m) & direction (?)	SE	SE	SE	SE	SE	SE	SE	SE	SE	SE	SE	E	S	SE	S	S	S	S	S	S	WSW
Period(s) (?)	13	13	13	13	12	12	11	12	11	11	11	8	16	9	14	14	13	12	11	11	5
Wave Graph (?)
kJ (?)	996	1339	905	535	502	367	375	343	166	94	72	0	5	14	15	35	119	98	65	66	118
Wind (km/h)	NNE	SE	NW	WSW	SW	W	ESE	SE	WNW	NNE	E	ENE	W	ESE	NNE	NNE	ENE	NNE	WNW	SSE	WSW
Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy	cross- off	on	cross- off	cross	cross	glass	glass	cross- on	cross- off	cross- off	cross	cross	cross- off	cross- on	cross- off	cross- off	cross	cross- off	cross- off	glass	glass
High Tide / height (m)		1:22PM 0.98	12:12AM 0.74		1:44PM 1.02	12:36AM 0.87		1:57PM 1.06	1:03AM 1.00		2:07PM 1.09	1:31AM 1.11		2:20PM 1.11	2:01AM 1.18		2:38PM 1.12	2:31AM 1.22		2:58PM 1.12
Low Tide / height (m)			6:35PM 0.56	6:18AM 0.19		7:09PM 0.48	7:06AM 0.10		7:39PM 0.39	7:45AM 0.03		8:07PM 0.32	8:20AM 0.00		8:34PM 0.26	8:51AM 0.01		9:00PM 0.22	9:19AM 0.05		9:23PM 0.19

	Tuesday 16			Wednesday 17			Thursday 18			Friday 19			Saturday 20			Sunday 21			Monday 22
Sunrise	5:50	-	-	5:48	-	-	5:48	-	-	5:47	-	-	5:46	-	-	5:45	-	-	5:43	-	-
Sunset	-	5:47	-	-	5:47	-	-	5:47	-	-	5:49	-	-	5:49	-	-	5:49	-	-	5:50	-

Rain (mm)	-	1	1	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	4
Temp. °C	27	24	21	22	22	21	23	22	21	30	30	24	26	25	26	36	35	29	36	34	22
Feels °C (?)	27	24	22	22	22	23	23	22	24	30	28	26	26	25	26	34	33	29	37	35	25

Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)
Wind Speed (km/h)

Recent Eyeball Surf Reports for Rio de Janeiro

Wind Update light winds from the SSE at Jacarepagua Airport imply that is on-shore at Praia da Macumba. No surfable waves
1 hour 58 minutes ago Praia da Macumba

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19 km away, 1 h 58 min ago

17 km/h

SSE

0.0

22.2

Air / Water (°C)

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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 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.