Praia do Calhau Surf Break

Lat Long: 2.49° S 44.28° W

Praia do Calhau Surf Forecast and Surf Report

Issued: 2 am 18 Aug 2026 (local time)

Forecast update in  hr  min

Today's Praia do Calhau sea temperature is
28.6° C
1.7° 

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


Praia do Calhau surf forecast from 18 Aug 2026:

  • Best quality surf: Wednesday 19 Aug, 9AM (local time) - 4.5ft (1.3m), 5s period, ENE swell with cross-offshore winds.
  • Most powerful swell: Monday 24 Aug, 3AM (local time) - 5ft (1.5m), 6s period, ENE swell with 139 kJ wave energy.
  • Next surfable swell (1★+): Wednesday 19 Aug, 9AM (local time) - 4.5ft (1.3m), 5s period with ENE swell.

Best Forecast Surf Conditions for Praia do Calhau this week:

The surf forecast for Praia do Calhau over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Wednesday (Aug 19) at 9AM. The primary swell is predicted to be 1.3m and 5s period with a secondary swell of 0.1m and 10s. The wind is predicted to be cross-offshore as the swell arrives.

The most powerful waves expected at Praia do Calhau in the next 16 days are 1.5m 6s and forecast to arrive on Monday (Aug 24) at 3AM. Winds are predicted to be cross-onshore at the time the swell arrives.

Wave TypeTime (-03) & Date Wave Height & Period
Next good surf (1 star+) 9AM (Wed 19th Aug)4.5ft (1.3m) 5s
Best Surf 9AM (Wed 19th Aug)4.5ft (1.3m) 5s
Most Powerful 3AM (Mon 24th Aug)5ft (1.5m) 6s

Table - best surf conditions forecast for Praia do Calhau over the next 16 days.


Short Range Forecast

Light rain (total 3mm), mostly falling on Wed night. Warm (max 31°C on Tue morning, min 25°C on Wed night). Mainly fresh winds.

Days 4-6 Weather Summary

Mostly dry. Warm (max 28°C on Fri morning, min 26°C on Fri afternoon). Mainly fresh winds.

Tuesday
18
Wednesday
19
Thursday
20
Friday
21
Saturday
22
Sunday
23
Monday
24
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
0
0
0
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.3
ENE
5
0.9
ENE
8
1.1
NE
4
1.3
ENE
5
0.8
ENE
7
1
NE
4
1.2
ENE
5
1
ENE
8
1.1
NE
5
1.1
ENE
5
1.1
NE
5
1
NE
4
1.2
ENE
5
1
ENE
5
1
NE
4
1.2
ENE
5
1.2
ENE
5
1.3
ENE
5
1.3
ENE
5
1
ENE
7
1
NE
5
Wave Graph
Metric surfscale
Energy kJ
85
98
46
85
70
40
62
117
56
56
57
39
67
52
40
69
69
90
90
93
45
Wind (km/h)
20
ESE
30
NNE
20
ENE
15
ESE
25
NNE
25
ENE
25
ENE
30
NNE
25
NE
30
ENE
30
NNE
25
NE
25
ENE
25
NNE
25
NE
30
ENE
35
NE
30
ENE
30
E
30
NE
30
ENE
Wind State
cross-off
on
cross-on
cross-off
on
cross-on
cross
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
on
cross-on
cross
cross-on
cross-on
cross
cross-on
cross-on
High Tide
10:56AM4.94m
11:09PM4.92m
11:36AM4.59m
11:51PM4.61m
12:24PM4.24m
00:42AM4.30m
1:25PM3.93m
1:48AM4.06m
2:45PM3.78m
3:12AM3.98m
4:10PM3.86m
4:30AM4.14m
5:15PM4.12m
Low Tide
4:58PM0.89m
5:22AM0.83m
5:37PM1.22m
6:08AM1.16m
6:25PM1.55m
7:04AM1.47m
7:27PM1.84m
8:19AM1.67m
8:49PM1.97m
9:44AM1.65m
10:12PM1.86m
10:54AM1.43m
11:16PM1.57m
clear
clear
part cloud
clear
clear
rain showers
thunderstorm
clear
rain showers
clear
clear
part cloud
cloud
clear
part cloud
part cloud
clear
part cloud
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:00
5:58
5:58
5:58
5:58
5:58
5:58
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:01
6:00
6:00
6:00
6:00
6:00
6:00
 mm
1
1
1
Temp °C
31
27
26
31
28
26
29
27
26
28
27
26
27
27
27
28
27
26
29
27
26
Feels °C
31
26
26
32
28
26
29
27
26
27
26
26
28
26
28
27
26
25
27
26
25
  • 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 Praia do Calhau Surf forecast

The above surf forecast table for Praia do Calhau provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Praia do Calhau can be found by selecting the local surf guide option on the grey menu. Our Praia do Calhau 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 (Praia do Calhau) 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 Praia do Calhau 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.

Praia do Calhau is 14 km (9 miles) from the city of Itaqui. If you plan a holiday in Maranhão, look for hotels and other accommodation in Itaqui. Itaqui has rooms for a wide range of budgets as well as car hire and transport links.

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