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Praia de Sao Marcos surfForecast / Maranhao / Brazil
12 Day Weather and Surf, issued 8 am Sunday 13 Jul 2025 -03
Best Forecast Surf Conditions for Praia de Sao Marcos this week:
The surf forecast for Praia de Sao Marcos over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Thursday (Jul 17) at 12PM. The primary swell is predicted to be 1.2m and 6s period with a secondary swell of 0.1m and 6s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Praia de Sao Marcos in the next 12 days are 1.0m 7s and forecast to arrive on Sunday (Jul 20) at 3PM. Winds are predicted to be cross-onshore at the time the swell arrives.
| Wave Type | Time (-03) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 12PM (Thu 17th Jul) | 4ft (1.2m) 6s |
| Best Surf | 12PM (Thu 17th Jul) | 4ft (1.2m) 6s |
| Most Powerful | 3PM (Sun 20th Jul) | 3.5ft (1.0m) 7s |
Table - best surf conditions forecast for Praia de Sao Marcos over the next 12 days.
Sunday 13 | Monday 14 | Tuesday 15 | Wednesday 16 | Thursday 17 | Friday 18 | Saturday 19 | Sunday 20 | Monday 21 | Tuesday 22 | Wednesday 23 | Thursday 24 | |||||||||||||||||||||||||
| AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Rating (10 max) | ||||||||||||||||||||||||||||||||||||
Swell Height Map |  |  |  |  |  |  |  |  |  |  |  |  | ||||||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||||||||||||||
| Period(s) (?) | 5 | 8 | 8 | 5 | 6 | 4 | 5 | 6 | 5 | 5 | 7 | 5 | 5 | 7 | 8 | 5 | 5 | 5 | 5 | 6 | 5 | 5 | 7 | 5 | 5 | 5 | 5 | 5 | 7 | 5 | 5 | 7 | 5 | 6 | 7 | 5 |
Wave (?)Graph  | ||||||||||||||||||||||||||||||||||||
| Energy (?) | 26 | 41 | 77 | 27 | 35 | 21 | 55 | 60 | 37 | 52 | 83 | 28 | 86 | 84 | 84 | 44 | 66 | 41 | 69 | 64 | 37 | 79 | 95 | 42 | 76 | 77 | 45 | 94 | 117 | 69 | 121 | 136 | 99 | 142 | 93 | 50 |
Wind (km/h) | ||||||||||||||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- off | cross- on | cross- on | cross | on | cross- on | cross | cross- on | cross- on | cross- on | cross- on | cross- on | cross | on | cross- on | cross | cross- on | cross- on | cross | cross- on | cross- on | cross | cross- on | cross- on | cross | cross- on | cross- on | cross | cross- on | cross- on | cross | cross- on | cross- on | cross | cross- on | cross- on |
High Tide / height (m) | 9:16PM 5.98 | 9:30AM 6.04 | 9:58PM 5.97 | 10:16AM 5.97 | 10:42PM 5.89 | 11:06AM 5.81 | 11:31PM 5.75 | 12:01PM 5.60 | 12:25AM 5.58 | 1:03PM 5.39 | 1:27AM 5.43 | 2:13PM 5.24 | 2:35AM 5.35 | 3:25PM 5.21 | 3:45AM 5.39 | 4:34PM 5.30 | 4:51AM 5.52 | 5:35PM 5.47 | 5:49AM 5.71 | 6:28PM 5.66 | 6:41AM 5.88 | 7:14PM 5.82 | ||||||||||||||
Low Tide / height (m) | 3:00PM 0.49 | 3:21AM 0.75 | 3:44PM 0.52 | 4:06AM 0.73 | 4:30PM 0.66 | 4:54AM 0.79 | 5:19PM 0.88 | 5:47AM 0.92 | 6:12PM 1.15 | 6:44AM 1.07 | 7:12PM 1.41 | 7:48AM 1.20 | 8:18PM 1.60 | 8:57AM 1.24 | 9:28PM 1.64 | 10:06AM 1.17 | 10:34PM 1.53 | 11:09AM 1.01 | 11:35PM 1.33 | 12:05PM 0.82 | 12:28AM 1.12 | 12:55PM 0.67 | 1:15AM 0.93 | |||||||||||||
Sunday 13 | Monday 14 | Tuesday 15 | Wednesday 16 | Thursday 17 | Friday 18 | Saturday 19 | Sunday 20 | Monday 21 | Tuesday 22 | Wednesday 23 | Thursday 24 | |||||||||||||||||||||||||
| Sunrise | 6:03 | - | - | 6:03 | - | - | 6:03 | - | - | 6:03 | - | - | 6:03 | - | - | 6:03 | - | - | 6:03 | - | - | 6:03 | - | - | 6:03 | - | - | 6:03 | - | - | 6:03 | - | - | 6:03 | - | - |
| Sunset | - | 6:01 | - | - | 6:01 | - | - | 6:01 | - | - | 6:02 | - | - | 6:02 | - | - | 6:02 | - | - | 6:02 | - | - | 6:02 | - | - | 6:02 | - | - | 6:02 | - | - | 6:02 | - | - | 6:02 | - |
 | |  | | |  |  | | | | | | | | | | |  | | | | | | | | | | | | | | | | | |  | |
Rain (mm) | - | - | - | - | - | 2 | 6 | 1 | 4 | 3 | 1 | 4 | 4 | - | 1 | 4 | - | 1 | 2 | - | 2 | 1 | - | - | 2 | - | 1 | 4 | - | 1 | - | - | - | 2 | 1 | - |
| Temp. °C | 29 | 30 | 27 | 29 | 28 | 27 | 28 | 29 | 26 | 29 | 28 | 26 | 28 | 29 | 26 | 29 | 29 | 26 | 28 | 28 | 27 | 29 | 29 | 26 | 29 | 29 | 26 | 29 | 29 | 26 | 29 | 29 | 26 | 29 | 27 | 26 |
| Feels °C (?) | 28 | 30 | 28 | 31 | 29 | 29 | 29 | 31 | 28 | 30 | 28 | 28 | 30 | 30 | 27 | 29 | 29 | 27 | 29 | 28 | 28 | 31 | 30 | 28 | 30 | 29 | 28 | 30 | 30 | 28 | 30 | 30 | 27 | 30 | 27 | 28 |
Short Range Forecast: Moderate rain (total 13mm), heaviest on Tue morning. Warm (max 30°C on Sun afternoon, min 26°C on Sun morning). Wind will be generally light. | Days 3-6 Weather Summary Moderate rain (total 18mm), heaviest on Wed night. Warm (max 29°C on Wed morning, min 26°C on Wed night). Wind will be generally light. | Days 6-9 Weather Summary Light rain (total 8mm), mostly falling on Sat night. Warm (max 29°C on Sun morning, min 26°C on Sat morning). Wind will be generally light. | Long Range Forecast: Light rain (total 8mm), mostly falling on Tue morning. Warm (max 29°C on Tue morning, min 26°C on Tue morning). Wind will be generally light. | |||||||||||||||||||||||||||||||||
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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 Praia de Sao Marcos 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 Praia de Sao Marcos Surf forecast
The above surf forecast table for Praia de Sao Marcos provides essential information for determining whether the surfing conditions will be good over the next 12 days. A general guide to surfing at Praia de Sao Marcos can be found by selecting the local surf guide option on the grey menu. Our Praia de Sao Marcos 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 de Sao Marcos) 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 de Sao Marcos 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 de Sao Marcos is 8 km (5 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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