Praia Grande Surf Break

Lat Long: 38.81° N 9.48° W

Praia Grande Surf Forecast and Surf Report

Issued: 12 pm 05 Aug 2026 (local time)

Forecast update in  hr  min

Today's Praia Grande sea temperature is
19.6° C
0.7° 

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


Praia Grande surf forecast from 5 Aug 2026:

  • Most powerful swell: Thursday 6 Aug, 4PM (local time) - 4.5ft (1.4m), 8s period, NNW swell with 268 kJ wave energy.

Best Forecast Surf Conditions for Praia Grande this week:

The most powerful waves expected at Praia Grande in the next 16 days are 1.4m 8s and forecast to arrive on Thursday (Aug 06) at 4PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.1m 12s period and expected on Thursday (Aug 06) at 4AM.

Wave TypeTime (WEST) & Date Wave Height & Period
Next good surf (1 star+)--
Best Surf--
Most Powerful 4PM (Thu 6th Aug)4.5ft (1.4m) 8s

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


The Lowdown

Alright, grab your board and let’s talk waves. To be straight with you, the next couple of weeks are looking pretty frustrating around Praia Grande. The ocean’s gonna be doing a whole lot of nothing for a while, and when it does wake up, the wind’s gonna be all over it. There are no good options in the first week, so if you’re keen, you might be better off doing some maintenance on your sticks or finding a job that pays for that new wetsuit.

The water’s sitting at 67°, which is about average for this time of year, so nothing weird there. The first few days are just junk. Wednesday the 5th and Thursday the 6th have some knee-to-waist high scraps, but the northerly cross-breeze is going to have it all chopped up and messy. Not worth the paddle out. The energy is weak, around 170 to 317, and the swell is just not organized. Friday the 7th is more of the same, and the weekend drops off even more. By Saturday the 8th, we’re looking at tiny 2ft leftovers with the wind going cross-onshore. It’s flat, it’s bumpy, and it’s about as inviting as a cold shower.

The start of next week, the 11th and 12th, still isn't doing us any favors. Sure, there’s a tiny pulse of longer-period swell (12 seconds) on Tuesday morning, but it’s only 2ft and the cross-shore wind is still messing with the surface. The energy is moderate at 155, but it’s not enough to make it fun. We’re looking at a solid 8-day gap with no decent surf. If you're a patient surfer, this is the test.

Now, here’s where things get interesting but also a little wild. Around the 14th and 15th, the swell really kicks in. We’re talking 7ft to 8ft faces from the NNW. The combined energy jumps to 545 and then up to 916, which is strong-very strong. This is proper swell, but here’s the catch: the wind is howling out of the north at 25 to 28 mph, and it’s all cross-shore. It’s going to be a mess. This is big, stormy, and lumpy. For a beach break like Praia Grande, this is going to be a washing machine. Honestly, the setup looks way more interesting for kite surfing than paddle surfing. If you’re an expert looking for a battle, Saturday the 15th could have some size, but it won’t be clean. The period is 9 seconds, which for that size means it’s going to be a bit walled and chaotic.

After that, the swell backs down a bit through the 17th and 18th, but the wind stays strong. We’re still looking at messy, cross-shore conditions. The waves are 5ft, but it’s not going to be good. From the 19th onward, the swell fades out, and we’re back to small, wind-blown scraps.

So, the long and short of it is: there’s no true standout in this whole 16-day window. The only time there’s real size is also the time the wind is blowing hard. The most promising window, if you’re desperate, is around the 15th of August, but only for experts who don’t mind a total free-for-all. For everyone else, it’s a blank run. But hey, that’s the ocean for you. It doesn’t stay poor for long, and forecasts can change. Keep an eye on the wind, and maybe we’ll get lucky.

Rusty.

Short Range Forecast

Mostly dry. Warm (max 21°C on Wed morning, min 19°C on Wed night). Mainly fresh winds.

Days 4-6 Weather Summary

Mostly dry. Warm (max 22°C on Sat morning, min 19°C on Sat night). Wind will be generally light.

Wednesday
5
Thursday
6
Friday
7
Saturday
8
Sunday
9
Monday
10
Tuesday
11
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.7
NW
9
0.7
NW
9
0.8
NNW
9
1.3
NNW
8
1.4
NNW
8
1.4
NNW
8
1.3
NNW
8
1.3
NNW
8
0.9
NNW
8
0.6
NNW
8
0.7
WNW
8
0.6
WNW
7
0.4
NW
11
0.9
NW
7
0.7
WNW
7
0.6
NW
8
1
NW
7
0.9
NW
7
0.5
NW
12
0.9
NW
8
0.7
WNW
10
Wave Graph
Metric surfscale
Energy kJ
88
84
101
239
268
256
211
216
118
51
56
38
35
67
49
48
102
69
69
95
100
Wind (km/h)
20
N
25
NNW
25
N
30
NNW
30
NNW
30
N
25
N
25
NNW
20
N
15
N
20
NW
20
NNW
15
NNW
25
NNW
20
NNW
20
NNW
25
NNW
20
N
20
N
25
NNW
25
N
Wind State
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross-on
cross
cross
cross-on
cross
cross
cross-on
cross
cross
cross-on
cross
High Tide
7:54PM2.40m
8:30AM2.28m
9:01PM2.26m
9:44AM2.23m
10:26PM2.18m
11:09AM2.28m
11:54PM2.25m
12:27PM2.45m
1:06AM2.41m
1:29PM2.69m
2:04AM2.59m
2:22PM2.93m
2:53AM2.75m
Low Tide
1:35PM0.63m
2:09AM0.63m
2:39PM0.75m
3:17AM0.76m
4:02PM0.80m
4:41AM0.80m
5:34PM0.73m
6:05AM0.72m
6:51PM0.53m
7:12AM0.54m
7:52PM0.30m
8:07AM0.35m
8:43PM0.09m
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:41
6:41
6:43
6:43
6:45
6:46
6:47
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
8:45
8:44
8:43
8:40
8:39
8:38
8:37
 mm
Temp °C
21
21
19
20
20
19
21
21
20
22
22
21
21
21
20
20
20
20
20
21
20
Feels °C
20
19
16
16
16
15
19
19
18
21
21
21
20
20
19
20
18
19
18
19
18
  • Map Icons:
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  • 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 Praia Grande Surf forecast

The above surf forecast table for Praia Grande provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Praia Grande can be found by selecting the local surf guide option on the grey menu. Our Praia Grande 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 Grande) 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 Grande 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 Grande is 9 km (6 miles) from Sintra. If you plan a holiday in Lisboa, 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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