Surf Forecasts:
Costa Nova surf forecast from 18 Aug 2026:
- Best quality surf: Monday 24 Aug, 1AM (local time) - 7ft (2.2m), 8s period, NNW swell with cross-offshore winds.
- Most powerful swell: Saturday 22 Aug, 10PM (local time) - 10ft (3.0m), 8s period, NNW swell with 1,000 kJ wave energy.
- Next surfable swell (1★+): Wednesday 19 Aug, 7AM (local time) - 3ft (0.9m), 7s 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 Wednesday (Aug 19) at 7AM. The primary swell is predicted to be 0.9m and 7s period with a secondary swell of 0.3m and 8s. Another secondary swell of 0.4m and 3s is also forecast. 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 3.0m 8s and forecast to arrive on Saturday (Aug 22) 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+) | 7AM (Wed 19th Aug) | 3ft (0.9m) 7s |
| Best Surf | 1AM (Mon 24th Aug) | 7ft (2.2m) 8s |
| Most Powerful | 10PM (Sat 22nd Aug) | 10ft (3.0m) 8s |
Table - best surf conditions forecast for Costa Nova over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s be straight with you. The next couple of weeks are looking pretty grim for a proper paddle. We’ve got a lot of onshore and cross-shore wind messing things up. The swell shows up, but it’s just not gonna be clean for the most part. Hang tight.
We’re looking at a dry spell for a while. From Tuesday the 18th right through to the morning of Monday the 24th, it’s just not worth getting wet. The waves are small, the winds are all over the place, and the energy is weak. You’ll see the swell numbers around 3ft to 7ft, but the winds are going to chop it all up into a mess. We’re talking poor surf conditions every session. Not a single one on offer. That’s a long stretch with nothing, so maybe catch up on some sleep.
Now, the one real bright spot in the first part of this forecast is the morning of Monday, the 24th of August. The wind drops out completely, and it goes glassy. That is a major plus. The swell is a bit disorganized at 5ft with a short period of 7 seconds, so it’s not going to be a world-beater, but it will be clean. The energy reading is up at 257, which is moderate. This is your best chance in the first week. It’s still a beach/jetty set-up, so the short period won't help it, but the clean conditions will make it fun.
After that, things get messy again real quick. The afternoon of the 24th gets windy, and the rest of that week is back to the same old story of onshore junk and poor form. The swell pulses a bit, with a bigger push of 8ft showing up on Sunday morning, the 30th of August. The energy jumps to a strong 1099, which is a serious amount of power. The wind is cross-off and it’s clean, so that’s a standout. However, 8ft is heading into expert territory, and with a short 8-second period, it could be a handful at this spot.
To be honest, that Sunday morning on the 30th is the pick of the entire run. The rest of that day and into the following week just falls apart. The winds will swing onshore and turn it into a washing machine. We’ve got another shot of energy on the 1st of September, but it’s all onshore and messy.
So, to sum it up: if you can only get out, make it Monday morning the 24th for a clean, smaller wave. For the bigger, more powerful stuff, you’re waiting for the morning of Sunday the 30th, but that one is for the experienced crew only.
Rusty out.
Short Range ForecastMostly dry. Warm (max 27°C on Mon night, min 18°C on Wed night). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Very mild (max 19°C on Sat afternoon, min 16°C on Sat night). Mainly strong winds. | ||||||||||||||||||||
Tuesday 18 | Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | |||||||||||||||
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 8 | NNW 8 | NNW 7 | NNW 7 | WNW 10 | WNW 9 | WNW 9 | NW 8 | NNW 7 | NNW 10 | NNW 10 | NNW 10 | NNW 9 | NNW 7 | NNW 8 | NNW 8 | NNW 7 | NNW 8 | NNW 7 | NNW 7 | NNW 7 |
Wave Graph  | |||||||||||||||||||||
 kJ | 204 | 119 | 86 | 51 | 38 | 65 | 61 | 82 | 485 | 794 | 733 | 778 | 445 | 467 | 998 | 469 | 508 | 546 | 250 | 151 | 134 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | on | cross | cross | on | glassy | cross | cross-on | cross | cross | cross-on | cross | cross | cross | cross | cross | cross | cross-off | glassy | cross-on | cross |
High Tide | 7:32AM2.79m | 7:52PM2.79m | 8:14AM2.64m | 8:38PM2.57m | 9:09AM2.49m | 9:47PM2.39m | 10:35AM2.40m | 11:28PM2.32m | 12:09PM2.43m | 00:52AM2.38m | 1:18PM2.55m | 1:51AM2.51m | 2:09PM2.71m | 2:34AM2.67m | |||||||
Low Tide | 1:24PM1.12m | 1:49AM1.22m | 2:08PM1.30m | 2:33AM1.39m | 3:02PM1.47m | 3:29AM1.54m | 4:14PM1.59m | 4:45AM1.63m | 5:45PM1.61m | 6:12AM1.60m | 7:07PM1.50m | 7:22AM1.47m | 8:01PM1.34m | ||||||||
 |  |  | | |  | | | | | | | | | | | | | | | | |
 | 6:47 | — | — | 6:48 | — | — | 6:48 | — | — | 6:50 | — | — | 6:50 | — | — | 6:52 | — | — | 6:52 | — | — |
 | — | 8:29 | — | — | 8:28 | — | — | 8:25 | — | — | 8:24 | — | — | 8:22 | — | — | 8:22 | — | — | 8:20 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 25 | 22 | 22 | 22 | 22 | 20 | 20 | 20 | 18 | 18 | 18 | 18 | 18 | 19 | 19 | 18 | 19 | 20 | 21 | 19 | 18 |
Feels °C | 23 | 23 | 24 | 21 | 22 | 22 | 22 | 19 | 15 | 15 | 13 | 14 | 14 | 13 | 13 | 13 | 13 | 15 | 18 | 16 | 16 |
Swell 1 Height (m) Direction Period (s) | NNW 8 | NNW 8 | NNW 7 | NNW 7 | NNW 6 | WNW 9 | WNW 9 | WNW 9 | SW 16 | WNW 9 | W 9 | WNW 8 | W 9 | WNW 9 | W 9 | W 9 | SW 13 | SW 13 | NNW 7 | W 8 | W 8 |
| kJ | 204 | 119 | 86 | 51 | 21 | 65 | 61 | 62 | 9 | 28 | 39 | 40 | 39 | 28 | 15 | 14 | 7 | 7 | 250 | 5 | 5 |
Swell 2 Height (m) Direction Period (s) | W 8 | WNW 8 | WNW 8 | WNW 8 | WNW 10 | NW 5 | NW 11 | NW 10 | — | SW 15 | SW 15 | SW 14 | SW 14 | SW 14 | SW 14 | SW 14 | — | W 13 | SW 13 | SW 13 | SW 12 |
| kJ | 5 | 6 | 13 | 12 | 38 | 6 | 31 | 27 | — | 9 | 8 | 8 | 7 | 8 | 8 | 7 | — | 3 | 7 | 7 | 6 |
Swell 3 Height (m) Direction Period (s) | SW 16 | SW 16 | SW 15 | WNW 11 | WSW 14 | WSW 3 | NW 4 | SW 13 | — | SW 12 | — | SW 14 | SW 14 | — | — | — | — | — | — | W 7 | W 11 |
| kJ | 10 | 10 | 9 | 12 | 20 | 1 | 3 | 7 | — | 6 | — | 8 | 7 | — | — | — | — | — | — | 1 | 2 |
Wind waves Height (m) Direction Period (s) | — | SW 3 | SSW 4 | SSW 3 | SW 3 | — | — | NW 8 | NNW 7 | NNW 10 | NNW 10 | NNW 10 | NNW 9 | NNW 7 | NNW 8 | NNW 8 | NNW 7 | NNW 8 | — | NNW 7 | NNW 7 |
| kJ | — | 4 | 2 | 2 | 2 | — | — | 82 | 485 | 794 | 733 | 778 | 445 | 467 | 998 | 469 | 508 | 546 | — | 151 | 134 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 48 | 220 | 5 | 48 | 147 | 0 | 5 | 238 | 218 | 413 | 238 | 81 | 76 | 351 | 268 | 398 | 307 | 0 | 0 | 286 | 52 |
Best forecast wave conditions in Beira | |||||||||||||||||||||
Best forecast wave conditions in Portugal | |||||||||||||||||||||
Header Global | |||||||||||||||||||||
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
FREE! Surf-Forecast.com widget for your website
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.
Nearest