Surf Forecasts:
Costa Nova surf forecast from 21 Aug 2026:
- Best quality surf: Saturday 22 Aug, 1AM (local time) - 5.5ft (1.7m), 10s period, NNW swell with glassy winds.
- Most powerful swell: Friday 28 Aug, 10AM (local time) - 7ft (2.1m), 10s period, NW swell with 800 kJ wave energy.
- Next surfable swell (1★+): Saturday 22 Aug, 1AM (local time) - 5.5ft (1.7m), 10s period with NNW 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 (Aug 22) at 1AM. The primary swell is predicted to be 1.7m and 10s period with a secondary swell of 0.5m and 9s. 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 2.1m 10s and forecast to arrive on Friday (Aug 28) at 10AM. Winds are predicted to be glassy at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 3s period and expected on Monday (Aug 24) at 7AM.
| Wave Type | Time (WEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 1AM (Sat 22nd Aug) | 5.5ft (1.7m) 10s |
| Best Surf | 1AM (Sat 22nd Aug) | 5.5ft (1.7m) 10s |
| Most Powerful | 10AM (Fri 28th Aug) | 7ft (2.1m) 10s |
Table - best surf conditions forecast for Costa Nova over the next 16 days.
The Lowdown
Alright, it’s your local surf reporter Rusty here. Let’s break down what’s cooking for Costa Nova over the next couple of weeks.
Straight up, the first few days are a write-off – Friday the 21st and Saturday the 22nd look pretty grim with onshore junk and marginal conditions. You’re better off sitting this one out until things clean up.
The real standout arrives Sunday the 23rd morning. Light offshore wind, clean surf, and a solid 5 ft swell rolling in from the west with an 11-second period. That’s proper groundswell energy (combined energy 545) and it’s going to shape up nice on the Costa Nova beach/jetty setup. This is the pick of the first week – get your board and go early.
Next up, Monday the 24th brings a risk of thunderstorms and a bumpy 5 ft SW swell with short 8-second period. It’s messy. Not worth paddling out unless you’re kiting, honestly. That onshore energy (combined 328) is a no-go for a clean session.
Things really turn around on Friday the 28th morning. That’s the big one. A 7 ft NW swell with an 11-second period, light cross-offshore wind, and over 1000 combined energy – you’re looking at powerful, well-stacked lines. This is for experienced surfers only (over 8 ft raw energy) but it’ll be pumping. Mark your calendar.
Saturday the 29th morning sees it dropping but still clean – 5 ft NW, glassy, offshore wind. Nice little follow-up session, though it won’t touch Friday’s power.
From Sunday the 30th onward it dries up fast. Swell fades to 4 ft or less with onshore wind and poor scores. There’s a gap of several days with nothing worth mentioning until Thursday the 3rd of September, which brings a weak 5 ft NNW with short period and cross-shore chop. Not recommended.
Best on offer: Sunday the 23rd morning for clean, fun waves, and Friday the 28th morning for a proper big-swell session – epic if you’ve got the skills.
Rusty.
Short Range ForecastLight rain (total 7mm), mostly falling on Sun afternoon. Warm (max 21°C on Sun afternoon, min 15°C on Fri night). Mainly fresh winds. | Days 4-6 Weather SummaryHeavy rain (total 21mm), heaviest during Wed night. Warm (max 22°C on Mon morning, min 17°C on Wed night). Winds decreasing (fresh winds from the SSE on Mon morning, light winds from the W by Wed night). | ||||||||||||||||||||
Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | Wednesday 26 | Thursday 27 | |||||||||||||||
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 10 | NNW 10 | NNW 10 | NNW 9 | NNW 9 | W 12 | W 10 | W 10 | WSW 9 | SW 8 | SW 8 | SW 7 | SW 7 | WNW 6 | WNW 6 | W 7 | WSW 7 | W 8 | WNW 8 | WNW 8 | WNW 9 |
Wave Graph  | |||||||||||||||||||||
 kJ | 788 | 670 | 588 | 255 | 165 | 702 | 468 | 369 | 202 | 341 | 276 | 152 | 43 | 42 | 40 | 134 | 77 | 358 | 703 | 534 | 562 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-on | glassy | cross | on | off | cross-off | on | cross-off | cross-off | cross-on | cross | cross | cross-on | cross-off | on | cross-on | on | on | on | cross |
High Tide | 10:35AM2.40m | 11:28PM2.32m | 12:09PM2.43m | 00:52AM2.38m | 1:18PM2.55m | 1:51AM2.51m | 2:09PM2.71m | 2:34AM2.67m | 2:49PM2.87m | 3:11AM2.82m | 3:24PM3.01m | 3:44AM2.94m | 3:56PM3.13m | ||||||||
Low Tide | 4:14PM1.59m | 4:45AM1.63m | 5:45PM1.61m | 6:12AM1.60m | 7:07PM1.50m | 7:22AM1.47m | 8:01PM1.34m | 8:11AM1.31m | 8:41PM1.17m | 8:50AM1.14m | 9:16PM1.01m | 9:25AM0.98m | 9:50PM0.88m | ||||||||
 | |  | | |  |  | |  |  |  | |  |  | | | |  | | | | |
 | 6:50 | — | — | 6:50 | — | — | 6:52 | — | — | 6:52 | — | — | 6:54 | — | — | 6:54 | — | — | 6:56 | — | — |
 | — | 8:24 | — | — | 8:22 | — | — | 8:22 | — | — | 8:20 | — | — | 8:19 | — | — | 8:16 | — | — | 8:15 | — |
mm | — | — | — | — | — | — | 2 | 4 | 1 | 1 | 3 | 1 | — | — | 4 | 1 | 2 | 9 | 2 | 1 | — |
Temp °C | 17 | 18 | 18 | 19 | 19 | 18 | 20 | 21 | 21 | 22 | 21 | 20 | 21 | 21 | 20 | 20 | 20 | 18 | 18 | 19 | 19 |
Feels °C | 15 | 14 | 17 | 18 | 18 | 19 | 19 | 21 | 21 | 19 | 18 | 20 | 19 | 19 | 20 | 20 | 17 | 16 | 16 | 18 | 19 |
Swell 1 Height (m) Direction Period (s) | SW 15 | W 11 | NNW 10 | NNW 9 | NNW 9 | W 12 | W 10 | W 10 | WSW 9 | SW 8 | SW 8 | SW 7 | SW 7 | WNW 6 | WNW 6 | W 7 | WSW 7 | SW 11 | WNW 8 | WNW 8 | WNW 9 |
| kJ | 9 | 57 | 588 | 255 | 165 | 702 | 468 | 369 | 202 | 341 | 276 | 152 | 43 | 42 | 40 | 134 | 77 | 5 | 703 | 534 | 562 |
Swell 2 Height (m) Direction Period (s) | SW 12 | SW 15 | W 9 | W 9 | W 9 | NNW 8 | N 8 | NNW 8 | SSW 6 | NNW 7 | NNW 7 | NNW 7 | WNW 6 | W 10 | NW 10 | NW 9 | WNW 7 | — | N 15 | NW 9 | SW 11 |
| kJ | 6 | 9 | 43 | 40 | 39 | 76 | 31 | 19 | 49 | 18 | 10 | 4 | 39 | 2 | 4 | 13 | 43 | — | 4 | 107 | 5 |
Swell 3 Height (m) Direction Period (s) | — | SW 12 | SW 14 | SW 14 | SW 14 | SW 14 | SW 13 | SW 13 | NNW 8 | SW 13 | W 13 | W 8 | N 6 | NW 12 | W 9 | SW 12 | NW 8 | — | — | NW 13 | — |
| kJ | — | 6 | 8 | 7 | 8 | 8 | 7 | 7 | 11 | 7 | 3 | 1 | 1 | 6 | 2 | 6 | 34 | — | — | 7 | — |
Wind waves Height (m) Direction Period (s) | NNW 10 | NNW 10 | — | — | — | — | — | — | — | ESE 3 | — | — | — | SW 6 | SSW 6 | — | — | W 8 | — | — | — |
| kJ | 788 | 670 | — | — | — | — | — | — | — | 1 | — | — | — | 30 | 12 | — | — | 358 | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 76 | 499 | 0 | 5 | 147 | 0 | 0 | 128 | 34 | 224 | 233 | 34 | 8 | 233 | 20 | 147 | 222 | 297 | 222 | 402 | 2 |
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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