Surf Forecasts:
Costa Nova surf forecast from 11 Sep 2026:
- Best quality surf: Wednesday 16 Sep, 1AM (local time) - 10ft (3.0m), 8s period, NNW swell with cross-shore winds.
- Most powerful swell: Wednesday 16 Sep, 10PM (local time) - 10ft (3.0m), 9s period, NNW swell with 1,482 kJ wave energy.
- Next surfable swell (1★+): Saturday 12 Sep, 1AM (local time) - 5ft (1.5m), 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 Saturday (Sep 12) at 1AM. The primary swell is predicted to be 1.5m and 7s period. 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 3.0m 9s and forecast to arrive on Wednesday (Sep 16) at 10PM. Winds are predicted to be cross-shore at the time the swell arrives.
| Wave Type | Time (WEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 1AM (Sat 12th Sep) | 5ft (1.5m) 7s |
| Best Surf | 1AM (Wed 16th Sep) | 10ft (3.0m) 8s |
| Most Powerful | 10PM (Wed 16th Sep) | 10ft (3.0m) 9s |
Table - best surf conditions forecast for Costa Nova over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let's get into it for the Costa Nova stretch. We've got a bit of a slow start, but there are some proper windows opening up if you're patient.
Right now, the water temp is sitting around 66°, which is pretty much where you'd expect it for this time of year – no surprises there. The pattern over the next couple of weeks starts off quiet, with the first proper surf window not really showing up until Sunday the 13th. Friday and Saturday are a write-off for anything worthwhile, so save your energy.
The standout of the whole run is hands down Sunday morning, the 13th. We're looking at a clean 4ft NW groundswell with a long 12-second period, pushing through a solid 538 units of energy. The wind is light easterly and offshore, so expect some clean, lined-up waves. This is a classic groundswell pulse and a point break like this is where it'll shine.
Next up, Thursday the 17th looks promising. Another clean morning with offshore ENE breeze, picking up a solid 7ft of NW swell (865 units of energy). That's getting into proper size, so you'll want your wits about you, but the quality should be there. Monday the 14th and Friday the 18th also offer clean, surfable options if you get up early.
There are a few other pulses of swell in the second week, like on the 19th and 23rd, but the winds get a bit more dicey. That big pulse on the 25th of September is huge – over 8ft – but it's crossed up by strong winds, making it a real handful and more of a looker than a paddler.
Overall, keep your eyes on the 13th and the 17th for the best windows. The rest of the time, you'll be chasing the smaller, wind-clean slots.
Rusty
Short Range ForecastMostly dry. Warm (max 32°C on Sun morning, min 19°C on Fri morning). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 29°C on Mon morning, min 17°C on Tue night). Winds increasing (calm on Mon morning, strong winds from the NNW by Wed afternoon). | ||||||||||||||||||||
Friday 11 | Saturday 12 | Sunday 13 | Monday 14 | Tuesday 15 | Wednesday 16 | Thursday 17 | |||||||||||||||
AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Swell Height Map |  |  |  |  |  |  |  | ||||||||||||||
Wave Height (m) Direction Period (s) | NNW 9 | NNW 5 | NW 7 | NNW 7 | NNW 7 | NW 14 | NW 12 | NW 12 | NW 12 | NW 11 | NW 11 | NW 10 | NW 12 | NW 5 | NNW 8 | NNW 8 | NNW 8 | NNW 9 | NW 10 | NW 10 | NNW 10 |
Wave Graph  | |||||||||||||||||||||
 kJ | 45 | 64 | 216 | 102 | 84 | 130 | 494 | 494 | 427 | 202 | 137 | 79 | 42 | 70 | 975 | 890 | 887 | 873 | 865 | 625 | 630 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-on | glassy | glassy | cross-on | glassy | off | cross-on | cross-off | glassy | cross-on | cross | cross | cross | cross | cross | cross | cross-off | cross-off | cross-on | cross-off |
High Tide | 4:18PM3.40m | 4:38AM3.21m | 4:53PM3.38m | 5:12AM3.18m | 5:27PM3.28m | 5:43AM3.11m | 6:00PM3.13m | 6:15AM3.00m | 6:32PM2.94m | 6:46AM2.85m | 7:05PM2.73m | 7:21AM2.69m | 7:43PM2.52m | ||||||||
Low Tide | 10:16PM0.68m | 10:25AM0.71m | 10:50PM0.70m | 11:00AM0.73m | 11:23PM0.77m | 11:35AM0.80m | 11:55PM0.89m | 12:10PM0.93m | 00:28AM1.04m | 12:47PM1.10m | 1:04AM1.22m | 1:29PM1.29m | 1:46AM1.40m | ||||||||
 | |  | | | | | | | | | | | | | |  | | | | | |
 | 7:11 | — | — | 7:11 | — | — | 7:13 | — | — | 7:13 | — | — | 7:15 | — | — | 7:15 | — | — | 7:16 | — | — |
 | — | 7:51 | — | — | 7:50 | — | — | 7:47 | — | — | 7:45 | — | — | 7:45 | — | — | 7:43 | — | — | 7:40 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 21 | 20 | 22 | 28 | 28 | 28 | 32 | 31 | 30 | 29 | 27 | 25 | 20 | 19 | 18 | 20 | 21 | 22 | 22 | 23 | 25 |
Feels °C | 18 | 17 | 22 | 25 | 24 | 26 | 29 | 27 | 27 | 25 | 24 | 23 | 19 | 16 | 13 | 15 | 15 | 17 | 18 | 18 | 21 |
Swell 1 Height (m) Direction Period (s) | NNW 9 | NW 8 | NW 7 | NNW 7 | NNW 7 | NNW 7 | NW 12 | NW 12 | NW 12 | NW 11 | NW 11 | NW 10 | NW 9 | WNW 11 | WNW 10 | NW 9 | NW 13 | NNW 9 | NW 10 | SW 12 | NNW 10 |
| kJ | 45 | 25 | 216 | 102 | 84 | 86 | 494 | 494 | 427 | 202 | 137 | 79 | 42 | 70 | 97 | 454 | 63 | 873 | 865 | 6 | 630 |
Swell 2 Height (m) Direction Period (s) | W 7 | W 7 | — | WNW 10 | WNW 9 | NW 14 | W 9 | W 9 | — | WNW 9 | WNW 9 | WNW 9 | W 8 | WNW 8 | — | — | — | NW 11 | — | — | S 12 |
| kJ | 8 | 4 | — | 75 | 68 | 130 | 41 | 6 | — | 73 | 71 | 42 | 34 | 22 | — | — | — | 445 | — | — | 3 |
Swell 3 Height (m) Direction Period (s) | NW 10 | W 8 | — | SW 13 | NW 16 | W 9 | NW 9 | SW 12 | — | — | S 11 | W 13 | NW 12 | — | — | — | — | SW 12 | — | — | W 16 |
| kJ | 15 | 1 | — | 7 | 10 | 59 | 3 | 6 | — | — | 2 | 4 | 37 | — | — | — | — | 6 | — | — | 5 |
Wind waves Height (m) Direction Period (s) | NNW 5 | NNW 5 | — | — | NW 7 | — | — | — | — | — | — | NNW 3 | NNW 4 | NW 5 | NNW 8 | NNW 8 | NNW 8 | — | — | NW 10 | — |
| kJ | 26 | 64 | — | — | 42 | — | — | — | — | — | — | 4 | 13 | 53 | 975 | 890 | 887 | — | — | 625 | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 52 | 361 | 0 | 0 | 221 | 0 | 0 | 132 | 0 | 0 | 147 | 52 | 52 | 1153 | 396 | 398 | 398 | 0 | 0 | 219 | 0 |
Best forecast wave conditions in Beira | |||||||||||||||||||||
Best forecast wave conditions in Portugal | |||||||||||||||||||||
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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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