Surf Forecasts:
Costa Nova surf forecast from 19 Aug 2026:
- Best quality surf: Saturday 22 Aug, 1AM (local time) - 10ft (3.0m), 8s period, NNW swell with cross-shore winds.
- Most powerful swell: Sunday 23 Aug, 10PM (local time) - 10ft (3.0m), 8s period, NNW swell with 1,047 kJ wave energy.
- Next surfable swell (1★+): Wednesday 19 Aug, 10PM (local time) - 1.5ft (0.5m), 9s period with WNW 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 10PM. The primary swell is predicted to be 0.5m and 9s period with a secondary swell of 0.4m and 5s. 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 8s and forecast to arrive on Sunday (Aug 23) at 10PM. Winds are predicted to be cross-onshore at the time the swell arrives.
| Wave Type | Time (WEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 10PM (Wed 19th Aug) | 1.5ft (0.5m) 9s |
| Best Surf | 1AM (Sat 22nd Aug) | 10ft (3.0m) 8s |
| Most Powerful | 10PM (Sun 23rd Aug) | 10ft (3.0m) 8s |
Table - best surf conditions forecast for Costa Nova over the next 16 days.
The Lowdown
Alright, let's look at what's cookin' at Costa Nova for the next couple weeks. Rusty here, with the lowdown.
We've got a bit of a mixed bag. Some days are a total washout, and some have real potential. At Costa Nova (this beach/jetty spot) , we're open to the west, which is what we want. Water temp is pretty average for the time of year.
The early part of this week is dead. Wednesday and Thursday are just a waste—tiny, weak, and messy. Energy levels are below 100, so don't bother.
Friday the 21st kicks off the real action. We get a 7 ft swell from the NNW, but it's got a cross-chop from a moderate breeze. It's rideable, with energy at 870, but it's more of a "maybe" than a "must".
Then Saturday morning, August 22nd is where I'd be. The swell drops to 5 ft from the NNW, but the wind goes dead calm. Glassy as a lake. Energy is 369, so plenty to push a longboard around. That's your session for clean, fun waves this week.
We get another pulse late in the week. Thursday morning, August 28th gives us 5 ft from the NW with a 10-second period, and another glassy morning. Absolutely no wind. The energy is a solid 499. Long-period groundswell, so the sets will be clean and have some punch. Very good.
But the real highlight is Monday, August 31st. This is a proper swell: 7 ft from the NW with a 13-second period. That's a long-period groundswell bringing serious energy – 1545. It's a big, powerful setup. The wind is cross-shore, so it won't be perfect, but the wave quality will be high. At 7 ft, it's expert only. It will be too big and powerful for most.
Tuesday, September 1st is even bigger – 8 ft from the NW with a 12-second period, and energy at 1859. Again, experts only. The cross-wind is a shame, but the power is huge.
Finally, Wednesday morning, September 2nd is another glassy day. The swell drops to 5 ft from the NNW with a 10-second period. Clean as a whistle with good energy (535).
So here's the game plan: For the cleanest, most user-friendly waves, get out there Saturday the 22nd or Friday the 28th of August. If you want to test yourself on a legit, powerful groundswell, and you've got the skills, look at Monday the 31st of August and Tuesday the 1st of September – just be ready for some cross-wind texture.
Stay sharp.
Rusty
Short Range ForecastMostly dry. Warm (max 21°C on Tue night, min 16°C on Thu night). Winds increasing (calm on Wed night, fresh winds from the NNW by Fri afternoon). | Days 4-6 Weather SummaryLight rain (total 2mm), mostly falling on Mon morning. Warm (max 20°C on Sun morning, min 15°C on Fri night). Mainly fresh winds. | ||||||||||||||||||||
Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | |||||||||||||||
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 6 | WNW 10 | WNW 9 | WNW 9 | NW 7 | NNW 7 | NNW 10 | NNW 7 | NNW 8 | NNW 7 | NNW 8 | NNW 8 | NNW 8 | NNW 8 | NNW 8 | NNW 7 | NNW 7 | NNW 6 | NW 5 | NW 5 | NW 11 |
Wave Graph  | |||||||||||||||||||||
 kJ | 54 | 38 | 65 | 61 | 349 | 523 | 855 | 479 | 978 | 208 | 432 | 869 | 525 | 381 | 989 | 270 | 145 | 71 | 30 | 13 | 30 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | on | glassy | cross-on | cross-on | cross | cross | cross | cross | glassy | cross-on | cross-on | cross | cross-on | cross-on | on | cross-on | cross | glassy | cross-on | glassy |
High Tide | 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 | 2:49PM2.87m | 3:11AM2.82m | |||||||
Low Tide | 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 | 8:11AM1.31m | 8:41PM1.17m | ||||||||
 | |  | |  |  | | | | | | | | | |  | | | |  |  | |
 | 6:48 | — | — | 6:48 | — | — | 6:50 | — | — | 6:50 | — | — | 6:52 | — | — | 6:52 | — | — | 6:54 | — | — |
 | — | 8:28 | — | — | 8:25 | — | — | 8:24 | — | — | 8:22 | — | — | 8:22 | — | — | 8:20 | — | — | 8:19 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 2 | — | — | — | — | — |
Temp °C | 21 | 21 | 19 | 19 | 19 | 19 | 17 | 18 | 18 | 18 | 19 | 19 | 20 | 19 | 19 | 19 | 18 | 18 | 19 | 19 | 19 |
Feels °C | 22 | 21 | 21 | 21 | 15 | 16 | 14 | 13 | 13 | 16 | 17 | 19 | 19 | 18 | 18 | 17 | 15 | 16 | 17 | 17 | 20 |
Swell 1 Height (m) Direction Period (s) | NNW 6 | NNW 6 | WNW 9 | WNW 9 | WNW 8 | SW 16 | SW 15 | SW 15 | SW 14 | NNW 9 | WNW 8 | W 9 | NNW 8 | W 9 | SW 13 | SW 13 | W 8 | W 8 | NW 5 | NW 5 | WNW 5 |
| kJ | 54 | 20 | 65 | 61 | 55 | 9 | 9 | 8 | 8 | 127 | 24 | 6 | 525 | 6 | 7 | 7 | 6 | 5 | 30 | 13 | 23 |
Swell 2 Height (m) Direction Period (s) | WNW 8 | WNW 10 | NW 5 | NW 4 | SW 13 | SW 13 | SW 12 | — | — | WNW 9 | SW 14 | SW 14 | W 8 | SW 13 | — | — | SW 13 | SW 12 | W 8 | W 7 | NW 11 |
| kJ | 12 | 38 | 11 | 9 | 7 | 7 | 6 | — | — | 27 | 8 | 8 | 6 | 7 | — | — | 7 | 6 | 5 | 4 | 30 |
Swell 3 Height (m) Direction Period (s) | WNW 11 | WSW 14 | NNW 13 | NW 11 | SW 16 | W 16 | — | — | — | SW 14 | SW 14 | — | SW 14 | — | — | — | — | W 11 | SW 12 | W 10 | W 7 |
| kJ | 12 | 20 | 17 | 31 | 10 | 5 | — | — | — | 7 | 8 | — | 7 | — | — | — | — | 2 | 6 | 2 | 4 |
Wind waves Height (m) Direction Period (s) | SSW 3 | SW 3 | — | — | NW 7 | NNW 7 | NNW 10 | NNW 7 | NNW 8 | NNW 7 | NNW 8 | NNW 8 | — | NNW 8 | NNW 8 | NNW 7 | NNW 7 | NNW 6 | — | — | — |
| kJ | 2 | 2 | — | — | 349 | 523 | 855 | 479 | 978 | 208 | 432 | 869 | — | 381 | 989 | 270 | 145 | 71 | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 5 | 218 | 0 | 2 | 218 | 218 | 76 | 248 | 65 | 0 | 376 | 5 | 8 | 351 | 100 | 81 | 264 | 52 | 154 | 222 | 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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