Surf Forecasts:
Costa Nova surf forecast from 24 Aug 2026:
- Best quality surf: Friday 28 Aug, 4AM (local time) - 10ft (3.0m), 11s period, W swell with cross-offshore winds.
- Most powerful swell: Friday 28 Aug, 7AM (local time) - 10ft (3.0m), 11s period, WNW swell with 2,108 kJ wave energy.
- Next surfable swell (1★+): Tuesday 25 Aug, 10PM (local time) - 3.5ft (1.0m), 6s period with W 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 Tuesday (Aug 25) at 10PM. The primary swell is predicted to be 1.0m and 6s period with a secondary swell of 0.1m and 10s. 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 11s and forecast to arrive on Friday (Aug 28) at 7AM. Winds are predicted to be cross-offshore at the time the swell arrives.
| Wave Type | Time (WEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 10PM (Tue 25th Aug) | 3.5ft (1.0m) 6s |
| Best Surf | 4AM (Fri 28th Aug) | 10ft (3.0m) 11s |
| Most Powerful | 7AM (Fri 28th Aug) | 10ft (3.0m) 11s |
Table - best surf conditions forecast for Costa Nova over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s look at what’s on the cards for Costa Nova over the next couple of weeks. It’s a bit of a mixed bag with a lot of waiting around, but there are a couple of moments that will have you sitting up straight.
The outlook starts slow. The first week is poor. You’ve got Monday the 24th through to Saturday morning the 29th with mostly messy, onshore, or lumpy conditions. The swell is there, but the wind and quality just aren’t playing ball. It’s not until Saturday morning the 29th that we get a tiny glimmer – a 4ft NW swell, cross-shore wind, and a gentle breeze. The combined swell energy is moderate at best (256), and it’s marginal. The real standout is a long way off. We’ve got a solid gap of poor days before things get interesting.
The real moment that catches the eye is the morning of Sunday the 7th of September. Now, that’s a big one. The swell is going to be huge – an 12ft WNW groundswell with a very long 17-second period. The combined energy is massive at 7662. The wind is light cross-offshore (S at 10 km/h), which will make it glassy and clean. But mate, listen up: at 12ft, this is strictly for experts only. This kind of long-period groundswell at a beach/jetty setup like Costa Nova can break straight, so it’s going to be powerful and tricky. This is the one you want to be watching if you’ve got the skills. Crowds are a possibility here as it’s sometimes busy.
Another solid option before that falls on Saturday the 5th of September morning. A 6ft WNW groundswell with a 12-second period and moderate cross-shore wind. The combined energy is 1379, which is moderate to strong. It’s only a 2 out of 10 in guidance, so it’s marginal, but it’s the best of the earlier week. The afternoon is too onshore.
The week after the 7th drops off quickly. The swell settles and the wind turns fresh and cross-onshore again. Not much to write home about.
Water temperature is sitting at 66°F, which is pretty average for the time of year and not unusual.
So, to sum it up: if you’re an expert, mark your calendar for Sunday the 7th of September morning. For the rest, Saturday the 5th of September morning might offer a window. The rest is a lot of waiting.
- Rusty
Short Range ForecastHeavy rain (total 31mm), heaviest during Wed morning. Warm (max 21°C on Mon afternoon, min 16°C on Wed night). Winds decreasing (strong winds from the S on Mon morning, calm by Tue night). | Days 4-6 Weather SummaryModerate rain (total 18mm), heaviest on Thu morning. Very mild (max 19°C on Thu afternoon, min 15°C on Thu morning). Wind will be generally light. | ||||||||||||||||||||
Monday 24 | Tuesday 25 | Wednesday 26 | Thursday 27 | Friday 28 | Saturday 29 | Sunday 30 | |||||||||||||||
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) | SW 8 | SW 8 | W 7 | W 7 | W 6 | WNW 6 | SSW 5 | WSW 7 | W 8 | WSW 8 | W 7 | W 9 | WNW 11 | WNW 10 | NW 9 | NW 8 | NW 8 | NW 8 | NW 8 | NW 8 | NW 8 |
Wave Graph  | |||||||||||||||||||||
 kJ | 1060 | 824 | 200 | 111 | 95 | 68 | 52 | 255 | 422 | 264 | 358 | 979 | 1808 | 940 | 424 | 256 | 187 | 145 | 111 | 145 | 142 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-on | cross-on | cross | on | cross-off | cross-off | cross-on | cross-off | cross-on | cross-on | cross-off | cross-off | cross-on | cross | cross | cross-on | cross | cross | cross-on | cross |
High Tide | 2:09PM2.71m | 2:34AM2.67m | 2:49PM2.87m | 3:11AM2.82m | 3:24PM3.01m | 3:44AM2.94m | 3:56PM3.13m | 4:14AM3.04m | 4:27PM3.22m | 4:45AM3.10m | 4:57PM3.26m | 5:14AM3.11m | 5:28PM3.26m | ||||||||
Low Tide | 8:01PM1.34m | 8:11AM1.31m | 8:41PM1.17m | 8:50AM1.14m | 9:16PM1.01m | 9:25AM0.98m | 9:50PM0.88m | 9:59AM0.86m | 10:23PM0.78m | 10:33AM0.78m | 10:57PM0.73m | 11:07AM0.75m | 11:31PM0.73m | ||||||||
 | |  |  | |  | | |  | | | |  | |  | | | | | | | |
 | 6:52 | — | — | 6:54 | — | — | 6:54 | — | — | 6:56 | — | — | 6:56 | — | — | 6:58 | — | — | 6:58 | — | — |
 | — | 8:20 | — | — | 8:19 | — | — | 8:16 | — | — | 8:15 | — | — | 8:14 | — | — | 8:12 | — | — | 8:10 | — |
mm | 4 | 3 | 3 | — | — | — | 10 | 4 | 7 | 14 | — | 4 | — | — | — | — | — | — | — | — | — |
Temp °C | 20 | 21 | 20 | 21 | 20 | 19 | 20 | 19 | 18 | 17 | 19 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 20 | 20 | 19 |
Feels °C | 15 | 18 | 20 | 21 | 19 | 20 | 16 | 18 | 17 | 15 | 15 | 15 | 18 | 15 | 16 | 15 | 15 | 17 | 19 | 18 | 18 |
Swell 1 Height (m) Direction Period (s) | NNW 8 | N 7 | W 7 | W 7 | W 6 | WNW 6 | NW 6 | WSW 7 | W 8 | NW 8 | NW 8 | W 9 | WNW 11 | WNW 10 | NW 9 | NW 8 | — | NW 8 | NW 8 | W 12 | NW 8 |
| kJ | 6 | 4 | 200 | 111 | 95 | 68 | 9 | 255 | 422 | 161 | 160 | 979 | 1808 | 940 | 424 | 256 | — | 145 | 111 | 11 | 142 |
Swell 2 Height (m) Direction Period (s) | NW 8 | — | SSW 7 | SW 6 | W 10 | NW 10 | NW 9 | SW 12 | — | SW 11 | S 11 | W 11 | — | — | — | — | — | NNW 8 | NNW 8 | — | — |
| kJ | 2 | — | 40 | 18 | 2 | 4 | 13 | 5 | — | 5 | 2 | 160 | — | — | — | — | — | 33 | 6 | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | SW 13 | N 4 | NW 12 | W 9 | SW 12 | SW 12 | — | — | — | — | — | — | — | — | — | — | W 13 | — | — |
| kJ | — | — | 6 | 2 | 5 | 2 | 6 | 5 | — | — | — | — | — | — | — | — | — | — | 3 | — | — |
Wind waves Height (m) Direction Period (s) | SW 8 | SW 8 | — | — | — | — | SSW 5 | NNW 6 | — | WSW 8 | W 7 | — | — | — | — | — | NW 8 | — | — | NW 8 | NNW 4 |
| kJ | 1060 | 824 | — | — | — | — | 52 | 3 | — | 264 | 358 | — | — | — | — | — | 187 | — | — | 145 | 37 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 218 | 218 | 114 | 34 | 147 | 0 | 298 | 566 | 5 | 233 | 222 | 224 | 63 | 222 | 76 | 76 | 222 | 52 | 76 | 590 | 76 |
Best forecast wave conditions in Beira | |||||||||||||||||||||
Best forecast wave conditions in Portugal | |||||||||||||||||||||
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The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Costa Nova surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.
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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