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Back Door Surf Forecast
/ Bahia – Sul (17 surf breaks) /
Surf Forecasts:
Back Door surfForecast / Bahia – Sul / Brazil
12 Day Weather and Surf, issued 2 pm Monday 15 Sep 2025 -03
Best Forecast Surf Conditions for Back Door this week:
The surf forecast for Back Door over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Saturday (Sep 20) at 6AM. The primary swell is predicted to be 1.4m and 9s period with a secondary swell of 0.8m and 7s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Back Door in the next 12 days are 1.1m 14s and forecast to arrive on Tuesday (Sep 16) at 6AM. Winds are predicted to be onshore at the time the swell arrives.
| Wave Type | Time (-03) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6AM (Sat 20th Sep) | 4.5ft (1.4m) 9s |
| Best Surf | 6AM (Sat 20th Sep) | 4.5ft (1.4m) 9s |
| Most Powerful | 6AM (Tue 16th Sep) | 3.5ft (1.1m) 14s |
Table - best surf conditions forecast for Back Door over the next 12 days.
Short Range Forecast Light rain (total 6mm), mostly falling on Wed morning. Warm (max 25°C on Mon afternoon, min 23°C on Mon night). Wind will be generally light. | Days 3-6 Weather Summary Heavy rain (total 45mm), heaviest during Sat morning. Warm (max 25°C on Thu afternoon, min 21°C on Sat night). Wind will be generally light. | ||||||||||||||||||||||
Mon 15 | Tuesday 16 | Wednesday 17 | Thursday 18 | Friday 19 | Saturday 20 | Sunday 21 | |||||||||||||||||
| PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | |||
Rating (10 max) | |||||||||||||||||||||||
Swell Height Map |  |  |  |  |  |  |  |  | |||||||||||||||
| Wave Height (m) & direction (?) | |||||||||||||||||||||||
| Period(s) (?) | 14 | 14 | 14 | 13 | 13 | 13 | 13 | 13 | 12 | 12 | 7 | 7 | 11 | 9 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | ||
Wave (?)Graph  | |||||||||||||||||||||||
| Energy (?) | 450 | 436 | 473 | 465 | 480 | 528 | 474 | 413 | 410 | 354 | 424 | 246 | 339 | 297 | 341 | 309 | 328 | 354 | 291 | 316 | 287 | ||
Wind (km/h) | |||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | on | on | on | on | on | cross- on | cross- on | on | on | on | cross- on | cross- on | on | on | on | on | cross | cross- on | cross- on | cross- on | cross | ||
High Tide / height (m) | 10:42PM 1.44 | 12:04PM 1.49 | 12:07AM 1.57 | 1:02PM 1.63 | 1:02AM 1.74 | 1:43PM 1.76 | 1:44AM 1.89 | 2:16PM 1.86 | 2:20AM 2.00 | 2:47PM 1.93 | 2:52AM 2.06 | 3:16PM 1.97 | 3:24AM 2.08 | ||||||||||
Low Tide / height (m) | 4:55PM 0.79 | 5:38AM 0.50 | 6:13PM 0.68 | 6:42AM 0.37 | 7:05PM 0.54 | 7:29AM 0.24 | 7:44PM 0.42 | 8:07AM 0.15 | 8:18PM 0.32 | 8:39AM 0.10 | 8:48PM 0.24 | 9:09AM 0.08 | 9:17PM 0.20 | 9:37AM 0.10 | |||||||||
Mon 15 | Tuesday 16 | Wednesday 17 | Thursday 18 | Friday 19 | Saturday 20 | Sunday 21 | |||||||||||||||||
| Sunrise | - | - | 5:30 | - | - | 5:28 | - | - | 5:28 | - | - | 5:28 | - | - | 5:26 | - | - | 5:26 | - | - | 5:26 | ||
| Sunset | 5:30 | - | - | 5:30 | - | - | 5:30 | - | - | 5:30 | - | - | 5:30 | - | - | 5:30 | - | - | 5:30 | - | - | ||
 |  | | |  |  | | | | | | | | | | | | | | | | |||
Rain (mm) | - | - | - | - | 1 | 3 | - | 1 | 1 | - | 1 | 5 | 6 | 15 | 8 | 5 | 4 | 1 | - | - | 1 | ||
| Temp. °C | 25 | 24 | 25 | 25 | 24 | 25 | 25 | 24 | 25 | 25 | 24 | 24 | 24 | 23 | 24 | 24 | 23 | 25 | 25 | 24 | 25 | ||
| Feels °C (?) | 25 | 25 | 25 | 25 | 25 | 26 | 25 | 25 | 25 | 25 | 26 | 25 | 25 | 24 | 25 | 25 | 25 | 25 | 25 | 25 | 26 | ||
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Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
Recent Eyeball Surf Reports for Bahia - Sul
The wind is still cross-on at Back Door (light winds from the SE at Ilheus Airport 15 km from Back Door). 1.2m 14s groundswell from the SSE with a 0.8m 6s windswell from the ESE. 2 swells combining to make bigger set waves.
2 h 20 min ago
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 Back Door 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 Back Door Surf forecast
The above surf forecast table for Back Door provides essential information for determining whether the surfing conditions will be good over the next 12 days. A general guide to surfing at Back Door can be found by selecting the local surf guide option on the grey menu. Our Back Door 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 (Back Door) 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 Back Door 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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