Surf Forecasts:
Costa Nova surf forecast from 27 Aug 2026:
- Best quality surf: Friday 28 Aug, 1AM (local time) - 6ft (1.8m), 10s period, W swell with cross-offshore winds.
- Most powerful swell: Friday 28 Aug, 7AM (local time) - 7ft (2.2m), 11s period, WNW swell with 1,132 kJ wave energy.
- Next surfable swell (1★+): Friday 28 Aug, 1AM (local time) - 6ft (1.8m), 10s 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 Friday (Aug 28) at 1AM. The primary swell is predicted to be 1.8m and 10s period with a secondary swell of 0.6m and 10s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Costa Nova in the next 16 days are 2.2m 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+) | 1AM (Fri 28th Aug) | 6ft (1.8m) 10s |
| Best Surf | 1AM (Fri 28th Aug) | 6ft (1.8m) 10s |
| Most Powerful | 7AM (Fri 28th Aug) | 7ft (2.2m) 11s |
Table - best surf conditions forecast for Costa Nova over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let's have a look at what's on the cards for our stretch of coast over the next couple of weeks.
Right off the bat, we've got a rough patch. Thursday and Friday are a write-off, with messy, onshore wind and junky surf. Honestly, it's going to be a bit of a slog to start. We're looking at a few days of waiting through choppy, poor conditions until we get a little window of hope.
The real standout in this forecast is Friday the 28th of August. It's not going to be perfect, but it's the best we've got. Friday morning at Costa Nova we're looking at a clean 7 ft swell rolling in from the WNW, with a nice long 11-second period giving it some punch. The wind is light and variable, just a light cross-shore (6 mph), which will keep the surface tidy. The combined swell energy is a solid moderate 1027. It's a decent sized wave, so it'll be a bit much for total beginners, but for anyone with a bit of experience, that morning session will be worth getting out of bed for. The afternoon cleans up even more with a light offshore breeze from the WNW, keeping the faces nice and smooth.
After that, the swell drops off and the wind turns ugly again for the weekend. Saturday the 29th and Sunday the 30th are looking pretty average, with cross-onshore winds and weaker, shorter-period swell. You could find a lumpy one if you're desperate, but you won't be missing much.
Now, if you've got patience, there are two interesting, quieter windows further out. The first is on Monday the 7th of September. Monday morning we get a glassy, dead-calm start. The swell is a modest 3 ft from the NW with a solid 11-second period, pushing a combined energy of 291. It's clean and rideable, but not massive. Then, the real long-range promise lands on Wednesday the 9th of September. Wednesday morning we’ve got flat calm, glassy conditions with a 3 ft swell from the WNW, but the period stretches out to a very long 12 seconds. That groundswell will have some proper shape and power to it (combined energy 352), making it a great option for a point break or a more defined bank if you can find one. This one is still a week and a half away, so keep an eye on it, but it has the makings of a special, clean session.
So, the call: Friday the 28th of August morning is your best bet for a proper surf. After that, hold out for the glassy mornings on Monday the 7th and especially Wednesday the 9th of September. Stay patient.
- Rusty
Short Range ForecastLight rain (total 9mm), mostly falling on Thu morning. Warm (max 20°C on Fri afternoon, min 16°C on Thu night). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 20°C on Sun morning, min 16°C on Mon night). Wind will be generally light. | ||||||||||||||||||||
Thursday 27 | Friday 28 | Saturday 29 | Sunday 30 | Monday 31 | Tuesday 1 | Wednesday 2 | |||||||||||||||
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) | WSW 7 | WNW 7 | W 10 | WNW 11 | WNW 10 | NW 9 | NW 8 | NW 8 | NW 8 | NW 9 | NW 9 | NW 9 | NW 9 | NW 11 | NW 10 | NW 9 | NW 9 | NW 8 | NW 8 | NNW 7 | NNW 7 |
Wave Graph  | |||||||||||||||||||||
 kJ | 262 | 143 | 612 | 1027 | 1040 | 626 | 306 | 203 | 187 | 339 | 375 | 231 | 241 | 813 | 687 | 241 | 471 | 517 | 283 | 243 | 282 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross-off | cross | on | cross | cross | cross-on | cross | cross | cross-on | cross | cross | cross-on | cross | cross | cross | cross | cross-on | cross-on | cross |
High Tide | 3:56PM3.13m | 4:14AM3.04m | 4:27PM3.22m | 4:45AM3.10m | 4:57PM3.26m | 5:14AM3.11m | 5:28PM3.26m | 5:45AM3.09m | 6:00PM3.20m | 6:18AM3.02m | 6:35PM3.08m | 6:55AM2.91m | 7:16PM2.91m | ||||||||
Low Tide | 9:50PM0.88m | 9:59AM0.86m | 10:23PM0.78m | 10:33AM0.78m | 10:57PM0.73m | 11:07AM0.75m | 11:31PM0.73m | 11:43AM0.78m | 00:08AM0.79m | 12:21PM0.86m | 00:47AM0.91m | 1:04PM0.99m | 1:31AM1.08m | ||||||||
 | |  |  | |  | | | | | | | | | | | | | | | | |
 | 6:56 | — | — | 6:56 | — | — | 6:58 | — | — | 6:58 | — | — | 7:00 | — | — | 7:01 | — | — | 7:01 | — | — |
 | — | 8:15 | — | — | 8:14 | — | — | 8:12 | — | — | 8:10 | — | — | 8:08 | — | — | 8:07 | — | — | 8:06 | — |
mm | 7 | 2 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 18 | 19 | 19 | 19 | 20 | 19 | 19 | 19 | 20 | 20 | 20 | 18 | 18 | 18 | 17 | 17 | 18 | 18 | 18 | 19 | 19 |
Feels °C | 13 | 17 | 18 | 18 | 20 | 19 | 17 | 17 | 21 | 21 | 17 | 15 | 16 | 15 | 14 | 15 | 14 | 15 | 18 | 17 | 17 |
Swell 1 Height (m) Direction Period (s) | NW 8 | WNW 7 | W 10 | WNW 11 | WNW 10 | NW 9 | NW 8 | NW 8 | NW 8 | NW 9 | NW 9 | NW 9 | NW 9 | WNW 10 | SW 16 | NW 9 | SW 15 | SW 15 | NW 8 | SW 16 | SW 16 |
| kJ | 29 | 143 | 612 | 1027 | 1040 | 626 | 306 | 203 | 187 | 339 | 375 | 231 | 241 | 20 | 10 | 241 | 9 | 8 | 283 | 9 | 10 |
Swell 2 Height (m) Direction Period (s) | SW 11 | NW 8 | NW 10 | — | — | — | — | — | — | W 13 | — | W 12 | W 11 | SW 18 | W 16 | SW 16 | — | — | SW 15 | — | W 16 |
| kJ | 5 | 20 | 61 | — | — | — | — | — | — | 3 | — | 3 | 9 | 12 | 5 | 10 | — | — | 8 | — | 5 |
Swell 3 Height (m) Direction Period (s) | W 12 | SW 9 | NW 8 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | 3 | 21 | 32 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | WSW 7 | SW 6 | — | — | — | — | — | — | — | — | NW 3 | NNW 4 | NNW 5 | NW 11 | NW 10 | NNW 6 | NW 9 | NW 8 | — | NNW 7 | NNW 7 |
| kJ | 262 | 124 | — | — | — | — | — | — | — | — | 2 | 26 | 66 | 813 | 687 | 123 | 471 | 517 | — | 243 | 282 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 222 | 222 | 0 | 5 | 222 | 32 | 20 | 222 | 32 | 42 | 218 | 76 | 76 | 218 | 81 | 76 | 238 | 32 | 52 | 300 | 42 |
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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