Sao Joao surfForecast / Lisboa / Portugal

information circle16 Day Weather and Surf, issued 6 pm Tuesday 05 May 2026 WEST
Forecast update in hr  min  s Forecast update imminent
Sao Joao surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Sao Joao sea temperature is
17.9° C
(Which is 1.6°C warmer than normal for this time of year)

Best Forecast Surf Conditions for Sao Joao this week:

The surf forecast for Sao Joao over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Friday (May 08) at 4AM. The primary swell is predicted to be 0.9m and 8s period with a secondary swell of 0.2m and 16s. The wind is predicted to be glassy as the swell arrives.

The most powerful waves expected at Sao Joao in the next 16 days are 2.1m 12s and forecast to arrive on Tuesday (May 12) at 1AM. Winds are predicted to be cross-onshore at the time the swell arrives.

Wave TypeTime (WEST) & Date Wave Height & Period
Next good surf (1 star+) 4AM (Fri 8th May)3ft (0.9m) 8s
Best Surf 4AM (Fri 8th May)3ft (0.9m) 8s
Most Powerful 1AM (Tue 12th May)7ft (2.1m) 12s

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


Updates in  hr  min  s Forecast update imminent

Short Range Forecast

Mostly dry. Very mild (max 18°C on Wed morning, min 13°C on Tue night). Winds decreasing (fresh winds from the NW on Wed afternoon, calm by Thu night).

Days 5-7 Weather Summary

Heavy rain (total 26mm), heaviest during Fri night. Very mild (max 18°C on Fri afternoon, min 14°C on Fri night). Mainly fresh winds.

Tue
5
Wednesday
6
Thursday
7
Friday
8
Saturday
9
Sunday
10
Monday
11
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
1
0
0
0
0
0
0
0
0
1
0
0
1
1
0
0
0
0
2
0
Swell
Height Map
<span class="translation_missing" title="translation missing: en.components.forecast-table.maps.snow_map">Snow Map</span>
<span class="translation_missing" title="translation missing: en.components.forecast-table.maps.snow_map">Snow Map</span>
<span class="translation_missing" title="translation missing: en.components.forecast-table.maps.snow_map">Snow Map</span>
<span class="translation_missing" title="translation missing: en.components.forecast-table.maps.snow_map">Snow Map</span>
<span class="translation_missing" title="translation missing: en.components.forecast-table.maps.snow_map">Snow Map</span>
<span class="translation_missing" title="translation missing: en.components.forecast-table.maps.snow_map">Snow Map</span>
<span class="translation_missing" title="translation missing: en.components.forecast-table.maps.snow_map">Snow Map</span>
<span class="translation_missing" title="translation missing: en.components.forecast-table.maps.snow_map">Snow Map</span>
Wave
Height (m)
Direction
Period (s)
1.4
NW
9
1.7
NNW
8
1.7
NNW
8
1.7
NNW
8
1.4
NNW
8
1.3
NNW
7
1.1
NNW
7
0.9
NNW
9
0.8
NNW
8
0.7
NNW
7
1.6
SSW
6
1.9
SW
8
2.2
SW
8
2.3
SW
9
2.2
SW
9
1.8
SW
8
1.3
NNW
12
1.5
NNW
11
1.6
NNW
11
2.1
NNW
12
1.8
NNW
11
Wave Graph
Metric surfscale
Energy kJ
309
409
370
361
238
167
108
119
71
48
154
416
619
745
753
403
441
543
628
1138
742
Wind (km/h)
25
NW
15
N
20
N
30
NW
20
NNW
15
NW
20
WNW
5
NW
15
SSE
20
SSW
25
SSE
25
SSW
30
SSW
20
SW
25
SSW
35
SSW
25
SW
20
WSW
20
W
15
NNW
15
NNW
cross-on
cross
cross
cross-on
cross
cross-on
on
cross-on
cross-off
cross
cross-off
cross
cross
cross-on
cross
cross
cross-on
on
on
cross-on
cross-on
High Tide
5:29PM2.48m
5:52AM2.22m
6:08PM2.35m
6:33AM2.07m
6:54PM2.23m
7:25AM1.95m
7:51PM2.14m
8:32AM1.89m
8:59PM2.10m
9:48AM1.91m
10:09PM2.16m
10:56AM2.03m
11:12PM2.28m
11:53AM2.21m
Low Tide
11:41PM0.58m
11:47AM0.70m
00:23AM0.72m
12:28PM0.83m
1:13AM0.85m
1:19PM0.93m
2:17AM0.92m
2:26PM1.00m
3:30AM0.91m
3:42PM0.99m
4:40AM0.80m
4:53PM0.89m
5:37AM0.63m
clear
clear
clear
clear
clear
part cloud
part cloud
part cloud
part cloud
part cloud
rain showers
rain showers
rain showers
rain showers
rain showers
thunderstorm
thunderstorm
clear
clear
clear
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:33
6:33
6:31
6:31
6:30
6:28
6:28
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
8:31
8:32
8:34
8:35
8:36
8:37
8:37
8:37
8
2
4
4
1
3
4
Temp °C
16
14
18
18
14
17
17
15
18
18
16
17
16
15
17
17
15
17
17
15
16
11
11
13
12
10
13
13
12
14
14
11
11
11
11
11
11
11
13
13
13
11
Swell 1
Height (m)
Direction
Period (s)
0.3
WSW
8
0.3
WSW
8
0.3
WSW
8
0.2
WSW
8
0.2
NNW
11
0.4
NW
10
1.1
NNW
7
0.9
NNW
9
0.8
NNW
8
0.7
NNW
7
0.5
W
13
0.6
W
12
0.7
NW
12
1.1
W
11
0.9
WNW
10
1
W
10
1.3
NNW
12
1.5
NNW
11
1.6
NNW
11
2.1
NNW
12
1.8
NNW
11
Energy kJ
13
12
11
6
12
26
108
119
71
48
89
106
157
284
135
202
441
543
628
1138
742
Swell 2
Height (m)
Direction
Period (s)
0.1
S
18
0.1
W
9
0.2
W
8
0.2
W
8
0.4
NW
10
0.1
W
16
0.3
WNW
15
0.3
WNW
14
0.4
NNW
7
0.5
NW
13
0.6
W
12
0.9
NNW
12
0.8
NNW
11
0.8
NNW
11
0.4
WNW
10
1.5
SW
8
1.2
SW
7
0.8
SW
7
0.5
SW
6
Energy kJ
6
2
6
5
23
5
42
41
19
87
103
218
157
128
38
244
147
54
18
Swell 3
Height (m)
Direction
Period (s)
0.1
SW
16
0.1
S
15
0.1
SW
15
0.1
W
8
0.1
W
8
0.1
SW
13
0.1
SW
13
0.2
NNW
15
0.3
NNW
7
0.2
NNW
7
0.1
S
16
0.1
S
16
0.3
NNW
13
0.1
SW
19
0.3
WNW
9
0.3
WNW
9
0.2
SSW
16
0.2
SSW
16
Energy kJ
10
4
8
1
1
7
7
21
10
5
5
5
31
15
17
15
27
25
Wind waves
Height (m)
Direction
Period (s)
1.4
NW
9
1.7
NNW
8
1.7
NNW
8
1.7
NNW
8
1.4
NNW
8
1.3
NNW
7
0.4
SW
3
0.4
SSW
3
1.6
SSW
6
1.9
SW
8
2.2
SW
8
2.3
SW
9
2.2
SW
9
1.8
SW
8
1.8
SW
8
Energy kJ
309
409
370
361
238
167
2
5
154
416
619
745
753
403
435
Nearest Offshore or Glassy
Rating
(10 max)
1
2
1
1
1
1
1
1
1
1
1
1
2
4
4
2
3
3
1
3
1
Distance (km)
373
4
298
484
198
156
442
99
51
435
80
451
442
104
104
451
440
348
234
4
92
Best forecast wave conditions in Lisboa
Rating
(10 max)
2
3
Best forecast wave conditions in Portugal
Rating
(10 max)
1
2
2
1
2
1
1
1
1
1
4
2
4
4
4
3
2
4
4
Header Global
Rating
(10 max)
4
5
6
5
5
7
6
5
6
6
5
5
5
4
5
5
5
6
8
9
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 Sao Joao Surf forecast

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

Sao Joao is 4 km (2 miles) from Paco de Arcos. If you plan a holiday in Lisboa, look for hotels and other accommodation in Paco de Arcos. Paco de Arcos has rooms for a wide range of budgets as well as car hire and transport links.

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