Surf Forecast Surf Report
Grumari surf break

Grumari surfForecast / Rio de Janeiro / Brazil

information circle12 Day Weather and Surf, issued 8 am Wednesday 30 Apr 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
25.2° 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 Wednesday (Apr 30) at 12PM. The primary swell is predicted to be 2.3m and 12s period with a secondary swell of 0.3m and 8s. The wind is predicted to be cross-onshore as the swell arrives.

The most powerful waves expected at Grumari in the next 12 days are 2.3m 12s and forecast to arrive on Wednesday (Apr 30) at 12PM. 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 7s period and expected on Wednesday (May 07) at 12AM.

Wave TypeTime (-03) & Date Wave Height & Period
Next good surf (1 star+)12PM (Wed 30th Apr)7.5ft (2.3m) 12s
Best Surf 9PM (Wed 30th Apr)6.5ft (2.0m) 11s
Most Powerful12PM (Wed 30th Apr)7.5ft (2.3m) 12s

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

Updates in  hr  min  s Forecast update imminent
Wednesday
30
Thursday
01
Friday
02
Saturday
03
Sunday
04
Monday
05
Tuesday
06
Wednesday
07
Thursday
08
Friday
09
Saturday
10
Sunday
11
AMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNight
Rating
(10 max)
0
0
0
0
0
0
0
0
Swell
Height Map
Wave Height (m) & direction (?)
2.4
SSW
2.2
SSW
2
S
1.6
S
2
S
1.9
S
1.9
S
1.9
S
1.8
S
1.6
S
1.5
S
1.3
S
1.3
S
1.3
S
1.2
SSE
1.1
SSE
1.2
SSE
0.9
SSE
0.9
SSE
0.9
SSE
0.9
SSE
0.9
SSE
0.9
SSE
0.9
SSW
1
SSW
1
SSW
0.9
SSW
0.8
SSW
0.8
SSW
0.7
SSW
0.6
SSW
0.6
S
0.6
S
0.5
S
0.4
S
0.4
S
Period(s) (?)1212111112121313131212111211111111111111121211141312121111101010991111
Wave
Graph
(?)Metric surfscale
Energy (?)151312089875951132936123712281037734625441449433376314337214202173199189198341361313237161153108756760383840
Wind
(km/h)
10
SSW
15
SSW
0
S
5
NNW
10
SSE
5
NE
10
NE
15
ESE
10
NE
5
NNE
15
ESE
5
NNE
5
N
10
SE
5
NE
5
NNE
15
ESE
10
NE
10
NNE
15
E
10
N
10
N
10
ESE
5
WNW
5
WNW
10
S
5
WNW
5
NNE
10
SE
10
NNE
10
N
10
S
5
NW
5
NNW
10
SSE
5
ENE
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
cross-
on
cross-
on
glassglassoncross-
off
cross-
off
cross-
on
cross-
off
cross-
off
cross-
on
cross-
off
glassoncross-
off
cross-
off
cross-
on
cross-
off
cross-
off
crosscross-
off
cross-
off
cross-
on
cross-
off
cross-
off
cross-
on
glassglasscross-
on
cross-
off
offonglassglassonglass
High Tide
/ height (m)
4:34PM
1.07
4:00AM
0.95
5:19PM
0.95
4:34AM
0.91
6:14PM 10:01PM
0.84 0.77
5:14AM
0.86
11:26PM
0.81
6:13AM
0.80
12:00AM
0.84
8:06AM
0.76
12:17AM
0.88
10:48AM
0.82
12:27AM
0.92
11:46AM
0.91
12:41AM
0.96
12:27PM
0.99
1:01AM
1.00
1:04PM
1.06
1:23AM
1.02
1:38PM
1.10
1:46AM
1.03
2:11PM
1.13
2:10AM
1.03
Low Tide
/ height (m)
10:44AM
0.09
11:39PM
0.52
11:30AM
0.15
12:30AM
0.63
12:29PM
0.22
9:31PM 1:36AM
0.77 0.69
1:46PM
0.29
2:59AM
0.70
3:12PM
0.32
4:20AM
0.65
4:31PM
0.31
5:21AM
0.56
5:32PM
0.28
6:06AM
0.47
6:20PM
0.24
6:43AM
0.37
7:00PM
0.22
7:16AM
0.29
7:36PM
0.21
7:46AM
0.22
8:09PM
0.22
8:15AM
0.16
8:42PM
0.25
Wednesday
30
Thursday
01
Friday
02
Saturday
03
Sunday
04
Monday
05
Tuesday
06
Wednesday
07
Thursday
08
Friday
09
Saturday
10
Sunday
11
Sunrise6:13--6:13--6:13--6:13--6:13--6:15--6:15--6:16--6:16--6:16--6:16--6:18--
Sunset-5:29--5:28--5:27--5:27--5:25--5:25--5:24--5:23--5:23--5:22--5:22--5:22-
part cloudpart cloudpart cloudclearclearclearclearclearclearpart cloudclearpart cloudclearclearclearclearclearclearclearclearclearclearclearclearclearclearclearclearclearclearclearclearclearclearclearclear
Rain (mm)
------------------------------------
Temp. °C232323232322242321242422242322252422262724282924272624272624322825282624
Feels °C (?)232224232223242220242323252322262323262625303027282727282726353028292827

Short Range Forecast: Mostly dry. Warm (max 24°C on Fri morning, min 19°C on Thu night). Wind will be generally light.

Days 3-6 Weather Summary Mostly dry. Warm (max 25°C on Mon morning, min 20°C on Sat night). Wind will be generally light.

Days 6-9 Weather Summary Mostly dry. Warm (max 29°C on Wed afternoon, min 21°C on Tue night). Wind will be generally light.

Long Range Forecast: Mostly dry. Warm (max 32°C on Sat morning, min 22°C on Sun night). Wind will be generally light.

  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
<span class="translation_missing" title="translation missing: en.leaflet.map_placeholder_alt">Map Placeholder Alt</span>
submit an eyeball surf report

Quick surf report for Grumari:

join our community of surf reporters

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.

Nearest
Nearest