Backdoor Surf Break

Backdoor Surf Forecast and Surf Report

Lat Long: 38.92° N 9.43° W

Issued: 6 pm 09 Jun 2026 (local time)

Forecast update in  hr  min

Today's Backdoor sea temperature is
17.5° C

Slightly cooler than normal

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


Backdoor surf forecast from 9 Jun 2026:

  • Best quality surf: Saturday 13 Jun, 10AM (local time) - 4.5ft (1.3m), 12s period, NW swell with cross-offshore winds.
  • Most powerful swell: Wednesday 17 Jun, 1AM (local time) - 6.5ft (2.0m), 12s period, WNW swell with 1,256 kJ wave energy.
  • Next surfable swell (1★+): Friday 12 Jun, 4AM (local time) - 5ft (1.5m), 8s period with NNW swell.

Best Forecast Surf Conditions for Backdoor this week:

The surf forecast for Backdoor over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Friday (Jun 12) at 4AM. The primary swell is predicted to be 1.5m and 8s period. The wind is predicted to be glassy as the swell arrives.

The most powerful waves expected at Backdoor in the next 16 days are 2.0m 12s and forecast to arrive on Wednesday (Jun 17) at 1AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 6s period and expected on Sunday (Jun 14) at 1AM.

Wave TypeTime (WEST) & Date Wave Height & Period
Next good surf (1 star+) 4AM (Fri 12th Jun)5ft (1.5m) 8s
Best Surf10AM (Sat 13th Jun)4.5ft (1.3m) 12s
Most Powerful 1AM (Wed 17th Jun)6.5ft (2.0m) 12s

Table - best surf conditions forecast for Backdoor over the next 16 days.


Updates in  hr  min  s Forecast update imminent

Short Range Forecast

Mostly dry. Warm (max 25°C on Thu morning, min 14°C on Tue night). Winds decreasing (strong winds from the N on Tue afternoon, calm by Thu night).

Days 5-7 Weather Summary

Mostly dry. Warm (max 27°C on Sat morning, min 18°C on Sun night). Wind will be generally light.

Tue
9
Wednesday
10
Thursday
11
Friday
12
Saturday
13
Sunday
14
Monday
15
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
Rating
(10 max)
0
0
0
0
0
2
0
1
2
0
1
3
1
2
1
0
1
0
0
0
0
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
3
NNW
8
3
NNW
8
2.5
NNW
8
2.5
NNW
8
2.2
NNW
8
1.9
NNW
8
1.7
NNW
8
1.5
NNW
8
1.5
NNW
8
1.2
NNW
8
0.6
NW
14
1.3
NW
12
1.4
NW
12
1.4
NW
11
1.2
WNW
10
1
WNW
10
0.9
NW
10
0.6
WNW
9
0.9
NW
6
0.6
WNW
9
0.6
WNW
13
Wave Graph
Metric surfscale
Energy kJ
1055
1148
1057
891
589
512
388
322
287
181
128
528
551
439
294
208
137
68
52
62
106
Wind (km/h)
45
N
40
N
35
N
40
N
25
N
15
N
20
NNW
10
N
15
SSE
15
W
10
NW
10
SE
15
WNW
10
NE
5
SW
10
W
5
W
10
NNW
25
NNW
20
NNW
20
NNW
Wind State
cross
cross
cross
cross
cross
cross
cross
cross
cross-off
on
cross-on
cross-off
cross-on
cross-off
cross-on
on
glassy
cross-on
cross-on
cross
cross
High Tide
10:25PM2.39m
11:09AM2.31m
11:28PM2.47m
12:08PM2.47m
00:29AM2.59m
1:03PM2.65m
1:27AM2.71m
1:56PM2.83m
2:23AM2.82m
2:47PM2.98m
3:16AM2.89m
3:37PM3.09m
4:08AM2.89m
Low Tide
4:06PM0.85m
4:49AM0.63m
5:12PM0.75m
5:49AM0.52m
6:15PM0.60m
6:45AM0.40m
7:14PM0.41m
7:39AM0.29m
8:09PM0.23m
8:31AM0.20m
9:02PM0.08m
9:21AM0.15m
9:54PM-0.00m
10:10AM0.15m
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
clear
part cloud
clear
clear
clear
clear
clear
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:11
6:11
6:11
6:11
6:11
6:11
6:11
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
9:00
9:01
9:01
9:02
9:02
9:04
9:04
9:04
 mm
Temp °C
16
15
18
18
17
25
24
22
25
25
22
27
24
21
22
21
19
20
19
17
19
Feels °C
8
8
11
11
13
21
20
21
22
23
21
26
22
20
22
20
19
20
16
15
16
Swell 1
Height (m)
Direction
Period (s)
0.1
S
12
0.4
WNW
9
1.9
NNW
8
0.4
WNW
9
1.5
NNW
8
1.5
NNW
8
1.2
NNW
8
0.7
NW
8
1.3
NW
12
1.4
NW
12
1.4
NW
11
1.2
WNW
10
1
WNW
10
0.9
NW
10
0.6
WNW
9
0.5
W
9
0.6
WNW
9
0.5
W
8
Energy kJ
3
25
512
25
322
287
181
69
528
551
439
294
208
137
68
45
62
36
Swell 2
Height (m)
Direction
Period (s)
0.1
S
17
0.1
S
17
0.1
S
15
0.5
WNW
8
0.6
NW
14
0.4
WNW
8
0.2
S
11
0.4
S
6
0.1
SW
13
0.3
SSW
4
0.4
WNW
10
0.4
NW
9
0.4
NW
9
0.3
NNW
10
0.6
WNW
13
Energy kJ
6
6
4
40
128
21
9
10
7
3
33
30
27
20
106
Swell 3
Height (m)
Direction
Period (s)
0.1
S
10
0.1
S
11
0.5
N
7
0.2
S
5
0.1
SW
13
0.1
SW
13
0.1
SW
13
0.1
SW
12
0.1
SW
12
0.2
NNW
11
0.1
SW
12
0.4
NW
10
Energy kJ
2
2
28
2
7
7
7
6
6
12
6
24
Wind waves
Height (m)
Direction
Period (s)
3
NNW
8
3
NNW
8
2.5
NNW
8
2.5
NNW
8
2.2
NNW
8
1.7
NNW
8
0.3
SSE
2
0.3
SSW
3
0.4
S
4
0.8
NW
5
0.9
NW
6
0.9
NW
5
0.7
NW
5
Energy kJ
1055
1148
1057
891
589
388
1
2
6
32
52
43
23
Nearest Offshore or Glassy
Rating
(10 max)
1
1
3
1
2
3
2
1
2
1
1
3
2
2
2
1
1
1
1
1
1
Distance (km)
410
400
28
407
37
25
206
28
0
182
25
0
137
0
1
29
0
25
214
25
25
Best forecast wave conditions in Ericeira
Rating
(10 max)
2
3
2
2
1
Best forecast wave conditions in Portugal
Rating
(10 max)
2
1
3
1
3
3
2
2
2
1
2
3
2
2
2
2
1
4
4
4
3
Header Global
Rating
(10 max)
5
5
7
8
6
6
5
5
7
6
5
4
5
5
5
4
5
5
4
5
5
  • 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 Backdoor Surf forecast

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

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

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