Grumari surf break

Grumari surfForecast / Rio de Janeiro / Brazil

information circle12 Day Weather and Surf, issued 2 am Sunday 01 Feb 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
28.2° C
(Which is 2.4°C warmer than normal for this time of year)


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 Sunday (Feb 01) at 12PM. The primary swell is predicted to be 0.8m and 14s period with a secondary swell of 0.5m and 9s. The wind is predicted to be offshore as the swell arrives.

The most powerful waves expected at Grumari in the next 12 days are 1.0m 14s and forecast to arrive on Sunday (Feb 01) at 9PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.5m 3s period and expected on Wednesday (Feb 04) at 12AM.

Wave TypeTime (-03) & Date Wave Height & Period
Next good surf (1 star+)12PM (Sun 1st Feb)2.5ft (0.8m) 14s
Best Surf12PM (Sun 1st Feb)2.5ft (0.8m) 14s
Most Powerful 9PM (Sun 1st Feb)3.5ft (1.0m) 14s

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

Updates in  hr  min  s Forecast update imminent

Short Range Forecast Heavy rain (total 34mm), heaviest during Tue night. Warm (max 33°C on Sun morning, min 23°C on Tue night). Wind will be generally light.

Days 3-6 Weather Summary Heavy rain (total 69mm), heaviest during Fri night. Warm (max 27°C on Wed morning, min 22°C on Fri night). Wind will be generally light.

Sunday
01
Monday
02
Tuesday
03
Wednesday
04
Thursday
05
Friday
06
Saturday
07
AMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNight
Rating
(10 max)
2
0
2
2
0
2
1
0
1
1
0
0
0
0
1
1
0
0
1
1
1
Swell
Height Map
Wave Height (m) & direction (?)
0.8
SSE
0.9
SSE
1
S
1
S
1
S
0.8
SSE
0.7
SSE
0.5
SSE
0.4
SSE
0.4
SE
0.3
SSE
0.4
SSW
0.3
S
0.3
S
1
S
0.9
S
0.9
S
1
SSE
0.9
SSE
0.8
SSE
0.7
SE
Period(s) (?)14141313121212111111116776666766
Wave
Graph
(?)Metric surfscale
Energy kJ (?)22028535535031419212374473023138869565682644839
Wind
(km/h)
15
N
15
SSE
10
N
10
WNW
15
SW
5
NE
5
NE
15
SSE
5
N
5
NW
10
SSE
5
NNE
0
W
10
SW
10
W
10
W
20
SSW
5
SW
10
NNW
0
WSW
5
NNE
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
offoncross-
off
cross-
off
cross-
on
cross-
off
glassonoffglassoncross-
off
glasscross-
on
cross-
off
cross-
off
cross-
on
cross-
on
offglasscross-
off
High Tide
/ height (m)
2:20PM
1.07
3:35AM
1.14
2:53PM
1.15
3:56AM
1.11
3:26PM
1.20
4:18AM
1.08
4:00PM
1.21
4:42AM
1.05
4:34PM
1.17
5:06AM
1.01
5:09PM
1.10
5:32AM
0.96
5:47PM
1.00
Low Tide
/ height (m)
9:21AM
0.35
9:26PM
-0.09
9:51AM
0.35
10:03PM
-0.08
10:19AM
0.34
10:37PM
-0.03
10:45AM
0.34
11:08PM
0.06
11:10AM
0.33
11:37PM
0.17
11:35AM
0.34
12:04AM
0.28
12:02PM
0.35
12:33AM
0.40
Sunday
01
Monday
02
Tuesday
03
Wednesday
04
Thursday
05
Friday
06
Saturday
07
Sunrise5:33--5:33--5:33--5:35--5:35--5:35--5:37--
Sunset-6:40--6:40--6:39--6:39--6:38--6:38--6:37-
clear
part cloud
part cloud
part cloud
part cloud
thunderstorm
part cloud
thunderstorm
rain showers
rain showers
thunderstorm
light rain
thunderstorm
thunderstorm
mod rain
part cloud
thunderstorm
heavy rain
mod rain
rain showers
cloud
Rain (mm)
-----1-1419224358-14471-
Temp. °C333327292826302924272726252523272623252624
Feels °C (?)353531313031333228313030302826302827283027
  • 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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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.

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