Costa Nova Surf Break

Lat Long: 40.63° N 8.75° W

Costa Nova Surf Forecast and Surf Report

Issued: 12 am 12 Aug 2026 (local time)

Forecast update in  hr  min

Today's Costa Nova sea temperature is
21.6° C
2.2° 

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


Costa Nova surf forecast from 12 Aug 2026:

  • Best quality surf: Sunday 16 Aug, 1AM (local time) - 10ft (3.0m), 8s period, NNW swell with cross-shore winds.
  • Most powerful swell: Saturday 15 Aug, 10PM (local time) - 11ft (3.5m), 8s period, NNW swell with 1,687 kJ wave energy.
  • Next surfable swell (1★+): Wednesday 12 Aug, 7AM (local time) - 2.5ft (0.8m), 9s period with WNW swell.

Best Forecast Surf Conditions for Costa Nova this week:

The surf forecast for Costa Nova over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Wednesday (Aug 12) at 7AM. The primary swell is predicted to be 0.8m and 9s period with a secondary swell of 0.7m and 5s. The wind is predicted to be glassy as the swell arrives.

The most powerful waves expected at Costa Nova in the next 16 days are 3.5m 8s and forecast to arrive on Saturday (Aug 15) at 10PM. Winds are predicted to be cross-shore at the time the swell arrives.

Wave TypeTime (WEST) & Date Wave Height & Period
Next good surf (1 star+) 7AM (Wed 12th Aug)2.5ft (0.8m) 9s
Best Surf 1AM (Sun 16th Aug)10ft (3.0m) 8s
Most Powerful10PM (Sat 15th Aug)11ft (3.5m) 8s

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


The Lowdown

Hey folks, Rusty here. Let's talk about what's on offer at Costa Nova for the next couple of weeks. The start is looking pretty good, with some clean, glassy mornings to get you out there, but the pattern gets a bit messy after the first few days, and then we hit a real rough patch that stretches for a long time.

Alright, here's how it shakes out:

Wednesday the 12th kicks things off sweetly. There's a glassy calm early with a clean 3ft swell from the WNW, with a period of 10 seconds and moderate energy (213). That's a solid morning for a paddle. By the afternoon though, the wind swings to a cross-onshore breeze at 12 mph and it gets choppy, so aim for the early session. Thursday the 13th is a very similar story: another glassy start, same kind of waist-high swell around 3ft from the WNW (264 combined energy), so nice and clean. The better option is for sure the morning. Friday the 14th again offers a glassy morning with a 3ft swell from the WNW and building energy (337). The wind stays light from the NNW, making for clean, fun waves. Saturday the 15th sees a jump in size, with an 8ft swell from the NNW, but it's short-period (8 seconds) and the wind is a strong cross-shore at 12-25 mph, creating a messy cross-chop. The morning has high energy (819), but the conditions are marginal at best. By the afternoon, the wind really kicks up and the energy hits 1161, but it's poor surf. Sunday the 16th drops a little to a 7ft NNW swell (613 energy) with a light cross-shore wind in the morning, but it's still not clean. This stretch from Saturday the 15th onward gets pretty rough.

Monday the 17th is the next standout. The morning brings a clean 6ft swell from the NNW with a light 3 mph cross-offshore wind from the north (413 energy). That's a big improvement and the surf will be clean and rideable. After that, it's mostly downhill. From Tuesday the 18th well into the following week, the winds are too strong, mostly cross or cross-onshore, and the swell mixes up with short periods. The afternoon of Thursday the 20th, for example, has an 8ft swell but with a strong 28 mph cross-shore wind and energy at 869 – that's going to be a washing machine. For a beach/jetty break like Costa Nova, that kind of power and wind makes it more interesting for kite surfing than a paddle session.

Overall, the first three mornings offer the cleanest, most user-friendly surf. The week after that, from around the 18th, there's a long stretch of poor conditions and strong, messy wind. The forecast into the second week, like the morning of Monday the 24th with a 6ft swell and fresh cross-shore wind, remains poor. Don't bank on anything good out there for a while.

Rusty.

Short Range Forecast

Mostly dry. Warm (max 21°C on Wed morning, min 18°C on Tue night). Wind will be generally light.

Days 4-6 Weather Summary

Mostly dry. Warm (max 25°C on Mon morning, min 19°C on Fri night). Winds decreasing (strong winds from the NNW on Sat afternoon, calm by Sun night).

Wednesday
12
Thursday
13
Friday
14
Saturday
15
Sunday
16
Monday
17
Tuesday
18
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
2
0
1
2
0
2
2
0
0
1
0
!
2
0
!
2
0
1
1
0
1
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.9
WNW
10
1
W
10
1
W
10
0.9
WNW
10
1
WNW
10
0.9
WNW
9
0.9
WNW
9
0.9
WNW
9
2.5
NNW
8
2.5
NNW
8
3
NNW
8
3
NNW
8
2.1
NNW
8
2.5
NNW
8
3
NNW
8
1.8
NNW
8
1.7
NNW
8
1.8
NNW
8
1.3
NNW
8
1.1
NNW
8
1.3
NNW
8
Wave Graph
Metric surfscale
Energy kJ
154
183
183
157
218
156
127
136
844
819
1161
1287
608
756
1103
402
364
392
217
153
220
Wind (km/h)
0
W
20
NW
10
N
5
WSW
20
NW
5
NW
5
NNW
25
NNW
30
NNW
20
NNW
40
NNW
15
N
10
NNW
30
NNW
5
ENE
5
N
25
NNW
5
N
5
NNW
25
NNW
5
N
Wind State
glassy
cross-on
cross
glassy
cross-on
glassy
glassy
cross-on
cross-on
cross
cross
cross
cross
cross-on
glassy
cross-off
cross-on
cross
cross
cross
cross
High Tide
3:58PM3.33m
4:25AM3.14m
4:40PM3.40m
5:05AM3.17m
5:20PM3.40m
5:42AM3.13m
5:58PM3.33m
6:19AM3.05m
6:35PM3.19m
6:55AM2.93m
7:13PM3.00m
7:32AM2.79m
7:52PM2.79m
Low Tide
9:27AM0.89m
10:00PM0.72m
10:10AM0.79m
10:41PM0.67m
10:50AM0.74m
11:20PM0.68m
11:28AM0.76m
11:57PM0.76m
12:06PM0.83m
00:33AM0.89m
12:44PM0.96m
1:10AM1.05m
1:24PM1.12m
1:49AM1.22m
part cloud
part cloud
clear
part cloud
part cloud
clear
part cloud
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
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>
8:37
8:36
8:35
8:32
8:31
8:30
8:29
 mm
Temp °C
21
20
19
20
20
19
19
20
20
20
21
21
23
23
22
25
23
22
24
23
22
Feels °C
21
20
19
20
20
20
18
19
19
19
16
16
23
20
23
22
21
22
24
20
21
  • 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 Costa Nova Surf forecast

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

Costa Nova is 8 km (5 miles) from the city of Ilhavo. If you plan a holiday in Beira, look for hotels and other accommodation in Ilhavo. Ilhavo has rooms for a wide range of budgets as well as car hire and transport links.

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