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Surf Forecasts:

Grumari surf break

Grumari surfForecast / Rio de Janeiro / Brazil

information circle16 Day Weather and Surf, issued 8 pm Wednesday 18 Mar 2026 -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
26.5° C
 (Which is normal for this time of year)

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 (Mar 19) at 6AM. The primary swell is predicted to be 1.1m and 9s period with a secondary swell of 0.4m and 9s. The wind is predicted to be cross-offshore as the swell arrives.

The most powerful waves expected at Grumari in the next 16 days are 1.1m 9s and forecast to arrive on Thursday (Mar 19) at 6AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.8m 7s period and expected on Thursday (Mar 26) at 3AM.

Wave TypeTime (-03) & Date Wave Height & Period
Next good surf (1 star+) 6AM (Thu 19th Mar)3.5ft (1.1m) 9s
Best Surf 6AM (Thu 19th Mar)3.5ft (1.1m) 9s
Most Powerful 6AM (Thu 19th Mar)3.5ft (1.1m) 9s

Table - best surf conditions forecast for Grumari over the next 16 days.

Updates in  hr  min  s Forecast update imminent 
16 DaysHourly
Print Table

Short Range Forecast Some drizzle, heaviest during Fri morning. Warm (max 26°C on Thu morning, min 21°C on Wed night). Wind will be generally light.

Days 3-6 Weather Summary Mostly dry. Warm (max 28°C on Tue morning, min 22°C on Sat night). Wind will be generally light.

Thursday
19
Friday
20
Saturday
21
Sunday
22
Monday
23
Tuesday
24
Wed
25
NightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPM
Rating
(10 max)
2
2
0
1
1
0
1
1
0
1
1
0
0
1
0
1
1
0
1
1
0
Swell
Height Map
See all maps
Wave Height (m) & direction (?)
1.1
SSE
1
SSE
1
SSE
1.1
SE
1
SE
0.9
SSE
0.9
SE
0.9
SE
0.8
SE
0.8
SE
0.8
SE
0.8
SE
0.7
SE
0.7
SE
1
ESE
0.6
ESE
0.6
ESE
0.7
ESE
0.5
ESE
0.5
ESE
0.6
ESE
Period(s) (?)99999999981010999899999
Wave
Graph
(?)Metric surfscale
Energy kJ (?)2171761581861551381321321071021131158883144475370434554
Wind
(km/h)
5
NE
5
E
10
SE
5
E
5
SE
15
SSE
5
ENE
0
NE
15
SE
5
NE
5
N
15
SE
10
ENE
5
ENE
15
SE
5
NE
5
N
15
ESE
5
N
10
N
10
SSE
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
cross-
off		glasscross-
on		cross-
on		glassonglassglassoncross-
off		glasscross-
on		crossglasscross-
on		cross-
off		cross-
off		cross-
on		cross-
off		offon
High Tide
/ height (m)
3:11AM
1.19
3:04PM
1.28
3:33AM
1.15
3:37PM
1.28
3:56AM
1.09
4:13PM
1.23
4:21AM
1.02
4:52PM
1.13
4:47AM
0.95
5:36PM
1.01
5:15AM
0.87
6:33PM 11:03PM
0.86 0.75
5:48AM
0.78
Low Tide
/ height (m)
9:21PM
-0.08
9:34AM
0.16
9:58PM
-0.02
10:06AM
0.15
10:36PM
0.08
10:39AM
0.16
11:16PM
0.23
11:12AM
0.19
12:01AM
0.39
11:52AM
0.24
1:01AM
0.55
12:52PM
0.31
10:02PM 2:34AM
0.75 0.66
2:36PM
0.36
Thursday
19
Friday
20
Saturday
21
Sunday
22
Monday
23
Tuesday
24
Wed
25
Sunrise-5:56--5:56--5:56--5:58--5:58--5:58--5:58-
Sunset--6:06--6:05--6:04--6:02--6:01--6:00--6:00
part cloud
cloud
cloud
part cloud
thunderstorm
part cloud
clear
part cloud
part cloud
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
thunderstorm
Rain (mm)
----1---------------1
Temp. °C232625242525242625242626242625242827253028
Feels °C (?)252827272726262826262827262826263028283329
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
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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.

View detailed surf forecast for Grumari at:
surf-forecast.com

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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