Surf Forecasts:
Praia de Sao Marcos surf forecast from 11 Jun 2026:
- Most powerful swell: Sunday 14 Jun, 12PM (local time) - 4.5ft (1.3m), 5s period, ENE swell with 93 kJ wave energy.
Best Forecast Surf Conditions for Praia de Sao Marcos this week:
The most powerful waves expected at Praia de Sao Marcos in the next 16 days are 1.3m 5s and forecast to arrive on Sunday (Jun 14) at 12PM. Winds are predicted to be cross-shore at the time the swell arrives.
| Wave Type | Time (-03) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 12PM (Sun 14th Jun) | 4.5ft (1.3m) 5s |
Table - best surf conditions forecast for Praia de Sao Marcos over the next 16 days.
Updates in hr min s Forecast update imminent
Short Range ForecastHeavy rain (total 40mm), heaviest during Wed night. Warm (max 29°C on Fri morning, min 26°C on Wed night). Wind will be generally light. | Days 5-7 Weather SummaryHeavy rain (total 23mm), heaviest during Sun night. Warm (max 28°C on Sun morning, min 26°C on Sun night). Wind will be generally light. | ||||||||||||||||||||
Thursday 11 | Friday 12 | Saturday 13 | Sunday 14 | Monday 15 | Tuesday 16 | Wed 17 | |||||||||||||||
Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | |
Swell Height Map |  |  |  |  |  |  |  |  | |||||||||||||
Wave Height (m) Direction Period (s) | NE 5 | NE 4 | ENE 5 | NE 5 | ENE 4 | ENE 5 | NE 5 | ENE 5 | ENE 5 | ENE 5 | ENE 5 | ENE 5 | NE 5 | NE 5 | NE 5 | NE 6 | NNE 7 | NE 7 | NE 4 | NE 4 | NE 4 |
Wave Graph  | |||||||||||||||||||||
 kJ | 43 | 28 | 46 | 31 | 34 | 50 | 41 | 64 | 50 | 39 | 74 | 83 | 51 | 45 | 35 | 31 | 20 | 35 | 15 | 16 | 27 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross | cross | cross-on | cross | cross-on | cross-on | cross-on | cross-on | cross-on | cross | cross-on | cross-on | cross | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on |
High Tide | 3:25AM5.52m | 4:04PM5.60m | 4:23AM5.76m | 5:02PM5.83m | 5:18AM6.01m | 5:57PM6.04m | 6:12AM6.21m | 6:49PM6.18m | 7:03AM6.35m | 7:41PM6.24m | 7:55AM6.38m | 8:31PM6.21m | 8:46AM6.29m | ||||||||
Low Tide | 9:07PM1.39m | 9:40AM1.02m | 10:08PM1.21m | 10:39AM0.71m | 11:06PM1.00m | 11:36AM0.42m | 00:01AM0.79m | 12:29PM0.20m | 00:53AM0.64m | 1:21PM0.09m | 1:45AM0.56m | 2:12PM0.11m | 2:35AM0.58m | 3:02PM0.25m | |||||||
 |  | |  |  | |  | | | | | | | | | | | | | | | |
 | — | 5:56 | — | — | 5:56 | — | — | 5:58 | — | — | 5:58 | — | — | 5:58 | — | — | 5:58 | — | — | 5:58 | — |
 | — | — | 5:55 | — | — | 5:55 | — | — | 5:55 | — | — | 5:55 | — | — | 5:57 | — | — | 5:57 | — | — | 5:57 |
mm | 23 | 5 | 3 | — | — | 1 | 3 | 1 | 4 | 3 | 4 | 2 | 7 | 3 | 2 | 2 | — | — | — | 1 | 2 |
Temp °C | 27 | 27 | 28 | 27 | 29 | 28 | 27 | 28 | 28 | 27 | 28 | 28 | 27 | 28 | 28 | 27 | 28 | 28 | 27 | 28 | 28 |
Feels °C | 29 | 28 | 30 | 29 | 31 | 29 | 28 | 29 | 29 | 29 | 30 | 29 | 29 | 30 | 30 | 30 | 30 | 29 | 29 | 30 | 29 |
Swell 1 Height (m) Direction Period (s) | — | NNE 8 | — | — | NNE 8 | — | — | — | — | — | — | — | — | N 7 | NNE 8 | — | NNE 7 | — | — | — | N 11 |
| kJ | — | 28 | — | — | 27 | — | — | — | — | — | — | — | — | 1 | 7 | — | 20 | — | — | — | 2 |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | N 11 | N 11 |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 2 | 2 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | NE 5 | NE 4 | ENE 5 | NE 5 | ENE 4 | ENE 5 | NE 5 | ENE 5 | ENE 5 | ENE 5 | ENE 5 | ENE 5 | NE 5 | NE 5 | NE 5 | NE 6 | ENE 4 | NE 7 | NE 4 | NE 4 | NE 4 |
| kJ | 43 | 26 | 46 | 31 | 34 | 50 | 41 | 64 | 50 | 39 | 74 | 83 | 51 | 45 | 35 | 31 | 7 | 35 | 15 | 16 | 27 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 1881 | 1119 | 1963 | 1464 | 1963 | 1974 | 1030 | 1320 | 1963 | 1030 | 1320 | 1963 | 1030 | 1107 | 1881 | 663 | 1329 | 2269 | 1096 | 1162 | 2027 |
Best forecast wave conditions in Maranhão | |||||||||||||||||||||
Best forecast wave conditions in Brazil | |||||||||||||||||||||
Header Global | |||||||||||||||||||||
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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 16 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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