Costa Nova Surf Break

Lat Long: 40.63° N 8.75° W

Costa Nova Surf Forecast and Surf Report

Issued: 12 am 02 Sep 2026 (local time)

Forecast update in  hr  min

Today's Costa Nova sea temperature is
20.4°C
1.1° 

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 2 Sep 2026:

  • Best quality surf: Saturday 5 Sep, 10PM (local time) - 4ft (1.2m), 13s period, NW swell with cross-offshore winds.
  • Most powerful swell: Monday 7 Sep, 10AM (local time) - 5ft (1.5m), 13s period, WNW swell with 703 kJ wave energy.
  • Next surfable swell (1★+): Wednesday 2 Sep, 4AM (local time) - 4.5ft (1.4m), 7s period with NW 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 (Sep 02) at 4AM. The primary swell is predicted to be 1.4m and 7s period with a secondary swell of 0.4m and 8s. Another secondary swell of 0.1m and 14s is also forecast. 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 1.5m 13s and forecast to arrive on Monday (Sep 07) at 10AM. 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+) 4AM (Wed 2nd Sep)4.5ft (1.4m) 7s
Best Surf10PM (Sat 5th Sep)4ft (1.2m) 13s
Most Powerful10AM (Mon 7th Sep)5ft (1.5m) 13s

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


The Lowdown

Right then, let’s talk about Costa Nova. The first week is pretty average, but there’s a real stand-out session way out in the second week that makes this worth paying attention to.

Right now, the surf is small and messy. The water is 69°, which is a touch warmer than normal for the time of year, but that’s not going to make the choppy cross-onshore wind feel any better. It’s not until the 6th that we get a proper window of clean conditions. That Sunday morning, the wind goes glassy and the swell is 4ft from the northwest with a 12-second period. The combined energy is moderate (495), and the conditions are actually good. That’s the one to aim for if you want a smooth session, but the swell isn’t huge.

Then we go through a messy patch. A bit of swell on the 7th and 8th but the wind is all wrong. A 5ft west-northwest swell on the Monday morning gets messed up by a cross-shore breeze. It’s just frustrating.

Now, the real standout is Wednesday the 16th of September. That morning, you’ve got a clean, glassy surface with a 6ft northwest swell and a 12-second period. The combined energy is strong (1025), so there’s some proper power in the water. The wind is calm, so it’ll be clean. That’s expert territory at 6ft, but if you’ve got the skills, this is the best session in the whole 16-day run. It’s a long way off though, so don’t book the day off work just yet.

In between, there are a few mornings where the wind is light or clean, like the 11th with a 3ft glassy swell, and the 13th with a 3ft clean cross-off wind. But they’re ordinary at best. The rest is mostly choppy cross-onshore junk.

Bottom line: There’s a good run of nothing much, then a golden window on Sunday the 6th for some clean but modest waves, and the real score is that Wednesday the 16th morning. Keep an eye on that one.

Rusty

Short Range Forecast

Mostly dry. Warm (max 29°C on Thu afternoon, min 17°C on Tue night). Wind will be generally light.

Days 4-6 Weather Summary

Some drizzle, heaviest during Sat afternoon. Warm (max 36°C on Sat morning, min 16°C on Sun night). Wind will be generally light.

Wednesday
2
Thursday
3
Friday
4
Saturday
5
Sunday
6
Monday
7
Tuesday
8
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
1
1
0
0
0
0
1
2
0
2
1
0
1
2
0
2
3
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)
0.9
NNW
6
1
NNW
6
1.2
NNW
7
0.9
NNW
7
0.7
WNW
9
0.7
WNW
8
0.7
WNW
8
0.8
WNW
9
0.8
WNW
9
0.8
WNW
9
0.6
NW
14
1.3
NW
12
1.3
NW
11
1.1
NW
11
0.9
WNW
15
1.5
WNW
13
1.4
WNW
12
1.3
WNW
11
1.8
NW
10
1.7
NW
9
1.9
NNW
7
Wave Graph
Metric surfscale
Energy kJ
61
68
116
76
68
61
59
113
99
101
158
494
418
268
376
703
505
387
636
461
323
Wind (km/h)
5
NNW
20
NNW
5
N
5
ENE
15
NNW
15
N
10
NW
20
NNW
5
SSE
15
ESE
15
W
15
SSW
10
SSW
10
W
15
NNW
15
NNW
30
NNW
10
NNW
5
NNW
25
NNW
25
NNW
Wind State
cross
cross-on
glassy
glassy
cross
cross
cross-on
cross-on
cross-off
off
on
cross
cross
on
cross
cross
cross-on
cross-on
glassy
cross-on
cross
High Tide
6:55AM2.91m
7:16PM2.91m
7:39AM2.77m
8:09PM2.71m
8:42AM2.62m
9:33PM2.52m
10:22AM2.53m
11:29PM2.47m
12:06PM2.61m
00:56AM2.59m
1:19PM2.80m
1:57AM2.77m
2:14PM3.02m
2:45AM2.95m
Low Tide
1:04PM0.99m
1:31AM1.08m
1:55PM1.15m
2:24AM1.27m
2:59PM1.32m
3:34AM1.43m
4:24PM1.41m
5:02AM1.49m
6:01PM1.36m
6:31AM1.41m
7:20PM1.19m
7:38AM1.23m
8:17PM0.99m
clear
clear
clear
clear
clear
clear
clear
part cloud
part cloud
clear
rain showers
clear
part cloud
clear
part cloud
part cloud
clear
clear
part cloud
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
7:01
7:03
7:03
7:05
7:05
7:07
7:07
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
8:06
8:04
8:02
8:00
8:00
7:58
7:55
 mm
1
Temp °C
20
20
22
28
29
26
27
27
30
36
31
26
23
21
20
18
18
18
18
18
17
Feels °C
19
18
23
26
26
23
24
23
26
34
29
26
23
22
21
16
15
18
17
16
14
  • 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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