Surf Forecasts:
Costa Nova surf forecast from 22 Aug 2026:
- Best quality surf: Friday 28 Aug, 7AM (local time) - 10ft (3.0m), 12s period, NW swell with cross-offshore winds.
- Most powerful swell: Friday 28 Aug, 7AM (local time) - 10ft (3.0m), 12s period, NW swell with 2,110 kJ wave energy.
- Next surfable swell (1★+): Saturday 22 Aug, 7PM (local time) - 3ft (0.9m), 9s 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 7PM. The primary swell is predicted to be 0.9m and 9s period with a secondary swell of 0.4m 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 3.0m 12s and forecast to arrive on Friday (Aug 28) at 7AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.7m 4s period and expected on Monday (Aug 24) at 7AM.
| Wave Type | Time (WEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 7PM (Sat 22nd Aug) | 3ft (0.9m) 9s |
| Best Surf | 7AM (Fri 28th Aug) | 10ft (3.0m) 12s |
| Most Powerful | 7AM (Fri 28th Aug) | 10ft (3.0m) 12s |
Table - best surf conditions forecast for Costa Nova over the next 16 days.
The Lowdown
Alright folks, it’s Rusty here, and I’ve been staring at the charts for our stretch of coast. We’ve got a 16-day window ahead, but honestly, it’s a bit of a mixed bag. Surf’s on the table, but we’re going to have to pick our moments carefully. The wind is the main culprit, keeping things from coming together cleanly for most of the run.
The first real glimmer of hope comes on Sunday morning, August 23rd. The water is sitting around average for this time of year, so nothing wild there. We’ll be at Costa Nova with a clean 6 ft of swell from the west, and a light, cross-offshore breeze. The period is a solid 10 seconds, giving those waves some shape. The combined energy is looking healthy at 635 (moderate), and it’s the best we’ll see for a while. This is the standout session for the first week. It’s not huge, but it’ll be fun.
After that, things get messy. From Monday the 24th through to the end of the month, we’re looking at a lot of poor surf conditions. The wind is either onshore or cross-onshore, and the swell is mostly weak and short-period. The 28th of August sees a bigger pulse of swell, hitting 8 ft on Friday afternoon, but with a strong cross-onshore wind, it’s going to be a choppy, blown-out mess. That’s more of a kite-surfing show than a paddle session.
We hit a bit of a lull right at the start of September, with very small, weak surf and no real quality. But then, the longer-range stuff starts to look a bit more promising, though it’s less certain. Thursday, September 3rd, and Friday, September 4th are the ones to circle on the calendar. We’ve got a proper groundswell rolling in from the NW, with a very long period of 12 seconds. The swell is solid, around 7 ft to 7 ft (combined energy 1131 to 1276, strong). The morning winds are light and cross-shore, keeping things relatively clean. The long period means these waves will have plenty of punch and long gaps between sets, so paddling out won’t be a war. But at 7 ft, this is getting into expert territory, so if you’re a beginner, it’s a no-go. The afternoon winds do pick up onshore, so get it early.
So, to wrap it up: Sunday the 23rd is your best bet for a clean, fun session. For the bigger, more powerful stuff, keep an eye on the 3rd and 4th of September, but take that long-range promise with a pinch of salt. The rest of the time, we’re dealing with a lot of wind and chop.
Stay stoked, and keep your eye on the horizon.
Rusty
Short Range ForecastModerate rain (total 19mm), heaviest on Sun morning. Warm (max 25°C on Sun afternoon, min 17°C on Sat morning). Winds decreasing (fresh winds from the SSE on Mon morning, calm by Mon night). | Days 4-6 Weather SummaryModerate rain (total 17mm), heaviest on Wed morning. Warm (max 20°C on Tue morning, min 16°C on Thu morning). Wind will be generally light. | ||||||||||||||||||||
Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | Wednesday 26 | Thursday 27 | Friday 28 | |||||||||||||||
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 9 | NNW 9 | W 12 | W 10 | W 10 | SW 9 | SW 8 | SW 8 | WSW 7 | WNW 7 | W 7 | WNW 6 | WSW 6 | W 7 | WNW 9 | WNW 8 | WNW 8 | WNW 9 | NW 11 | NW 10 | NW 10 |
Wave Graph  | |||||||||||||||||||||
 kJ | 221 | 165 | 827 | 535 | 371 | 607 | 702 | 403 | 212 | 139 | 138 | 68 | 102 | 192 | 572 | 438 | 498 | 721 | 1915 | 1178 | 577 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | on | cross-off | cross-off | cross-off | cross-off | cross-off | cross-on | cross-on | glassy | on | cross-off | cross | on | cross | cross-on | on | glassy | glassy | cross-on | cross |
High Tide | 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 | 4:14AM3.04m | 4:27PM3.22m | ||||||||
Low Tide | 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 | 9:59AM0.86m | 10:23PM0.78m | ||||||||
 |  |  |  | | |  | |  |  | | |  | |  | | |  | | | | |
 | 6:50 | — | — | 6:52 | — | — | 6:52 | — | — | 6:54 | — | — | 6:54 | — | — | 6:56 | — | — | 6:56 | — | — |
 | — | 8:22 | — | — | 8:22 | — | — | 8:20 | — | — | 8:19 | — | — | 8:16 | — | — | 8:15 | — | — | 8:14 | — |
mm | — | — | — | 11 | — | — | 3 | 2 | 3 | — | — | — | 5 | 1 | 6 | 5 | — | — | — | — | — |
Temp °C | 19 | 19 | 18 | 20 | 25 | 20 | 21 | 21 | 20 | 20 | 20 | 20 | 20 | 20 | 19 | 18 | 19 | 19 | 19 | 19 | 18 |
Feels °C | 18 | 17 | 18 | 19 | 22 | 18 | 16 | 19 | 20 | 20 | 19 | 21 | 19 | 18 | 18 | 15 | 16 | 18 | 18 | 17 | 16 |
Swell 1 Height (m) Direction Period (s) | NNW 9 | NNW 9 | W 12 | W 10 | W 10 | SW 9 | SW 8 | NNW 7 | WSW 7 | WNW 7 | W 7 | WNW 6 | NW 9 | WNW 8 | WNW 9 | SW 11 | WNW 8 | WNW 9 | NW 11 | NW 10 | NW 10 |
| kJ | 221 | 165 | 827 | 535 | 371 | 607 | 702 | 10 | 212 | 139 | 138 | 68 | 13 | 48 | 572 | 5 | 498 | 721 | 1915 | 1178 | 577 |
Swell 2 Height (m) Direction Period (s) | W 9 | W 9 | NNW 8 | NNW 8 | NNW 8 | NNW 8 | NNW 8 | — | N 7 | SSW 6 | NW 12 | WNW 10 | NW 6 | SW 12 | — | — | SW 11 | WNW 11 | — | — | — |
| kJ | 40 | 39 | 76 | 20 | 11 | 11 | 11 | — | 1 | 26 | 5 | 10 | 2 | 5 | — | — | 5 | 41 | — | — | — |
Swell 3 Height (m) Direction Period (s) | SW 14 | SW 14 | SW 14 | SW 13 | — | SW 13 | — | — | SW 13 | SW 12 | W 10 | W 9 | SW 12 | SW 12 | — | — | — | SW 11 | — | — | — |
| kJ | 7 | 8 | 8 | 7 | — | 6 | — | — | 6 | 6 | 2 | 2 | 6 | 5 | — | — | — | 5 | — | — | — |
Wind waves Height (m) Direction Period (s) | — | — | — | SE 3 | SSW 6 | — | SE 4 | SW 8 | — | — | — | — | WSW 6 | W 7 | — | WNW 8 | — | — | — | — | — |
| kJ | — | — | — | 2 | 66 | — | 16 | 403 | — | — | — | — | 102 | 192 | — | 438 | — | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 5 | 222 | 0 | 0 | 40 | 48 | 136 | 224 | 147 | 0 | 147 | 0 | 297 | 233 | 147 | 286 | 351 | 0 | 2 | 222 | 63 |
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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