Surf Forecasts:
Costa Nova surf forecast from 15 Aug 2026:
- Best quality surf: Friday 21 Aug, 10PM (local time) - 10ft (3.0m), 8s period, NNW swell with cross-shore winds.
- Most powerful swell: Thursday 20 Aug, 10PM (local time) - 10ft (3.0m), 8s period, NNW swell with 1,060 kJ wave energy.
- Next surfable swell (1★+): Sunday 16 Aug, 1AM (local time) - 8ft (2.4m), 8s 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 Sunday (Aug 16) at 1AM. The primary swell is predicted to be 2.4m and 8s period. 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 Thursday (Aug 20) at 10PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 3s period and expected on Tuesday (Aug 18) at 10AM.
| Wave Type | Time (WEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 1AM (Sun 16th Aug) | 8ft (2.4m) 8s |
| Best Surf | 10PM (Fri 21st Aug) | 10ft (3.0m) 8s |
| Most Powerful | 10PM (Thu 20th Aug) | 10ft (3.0m) 8s |
Table - best surf conditions forecast for Costa Nova over the next 16 days.
The Lowdown
Righto, let's have a look at what Costa Nova's got cooking over the next couple of weeks.
Alright, so the next couple of weeks at Costa Nova are a bit of a mixed bag. We've got some pulses of swell coming through, but the wind is going to be the big talking point. The water is sitting at 69°F, which is a touch warmer than usual for this time of year, so that's a nice bonus if you're in a shorty.
The first real chance to get wet looks like Sunday, August 16th. The morning session is the one to aim for. We've got a 5ft swell from the NNW with 8 seconds between waves, and the wind is dead calm – glassy conditions. That's about as good as it gets for clean surf, even if the energy is only moderate (330). It won't be huge, but it'll be fun and clean for an intermediate surfer. The afternoon chops up as the wind swings onshore.
Monday, August 17th morning is a carbon copy of the Sunday session. Another glassy morning, with a 5ft swell from the NNW. Again, it's all about the clean conditions. The energy is still moderate (284). The afternoon will see the wind turn again, so get out early.
Now, Thursday, August 20th morning sees a bump in size, with 6ft from the NW, but it's a cross-onshore wind, so it'll have some bumps on it. The energy is building though (439). There's a better window on August 26th, a Wednesday morning. The swell is a tidy 5ft from the NNW, but the wind is a light glass-off from the ENE. That's a major positive, meaning you'll find some clean lines. The energy is moderate (273).
If you're a competent surfer, Sunday, August 23rd afternoon might be worth a look. The swell is 5ft from the NNW and the wind is directly offshore from the WNW. The energy is moderate (551), but that onshore wind is going to make it a bit of a battle to get out. It's not for the faint-hearted.
Honestly, for most of this run, the standout moments are the glassy mornings on the 16th, 17th, and 26th. Those are the pick of the bunch for getting some clean, user-friendly waves. The bigger swells in the second half of the period (from the 21st onwards) are all getting chopped up by messy cross-shore winds, so they're not worth the paddle out.
To sum it up, set your alarm for the early glass-offs on the 16th and 17th of August, and keep an eye on the 26th of August for another clean morning. The rest of the time, you're fighting the wind.
- Rusty
Short Range ForecastMostly dry. Warm (max 29°C on Mon morning, min 20°C on Sat morning). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 25°C on Tue morning, min 17°C on Thu night). Winds increasing (light winds from the N on Wed night, fresh winds from the NNW by Thu night). | ||||||||||||||||||||
Saturday 15 | Sunday 16 | Monday 17 | Tuesday 18 | Wednesday 19 | Thursday 20 | Friday 21 | |||||||||||||||
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) | NW 8 | NW 8 | NNW 8 | NNW 8 | NNW 8 | NNW 8 | NNW 8 | NNW 8 | NNW 8 | NNW 8 | NNW 8 | NNW 8 | NNW 7 | WNW 10 | WNW 9 | NW 8 | NNW 8 | NNW 8 | NNW 7 | NNW 7 | NNW 8 |
Wave Graph  | |||||||||||||||||||||
 kJ | 440 | 527 | 809 | 318 | 213 | 302 | 274 | 161 | 192 | 119 | 103 | 52 | 37 | 34 | 50 | 427 | 730 | 1040 | 456 | 565 | 857 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross-off | glassy | cross-on | cross | glassy | cross-on | glassy | cross | cross-on | cross | cross | cross-on | cross | cross-on | cross | cross | cross | cross | cross |
High Tide | 5:58PM3.33m | 6:19AM3.05m | 6:35PM3.19m | 6:55AM2.93m | 7:13PM3.00m | 7:32AM2.79m | 7:52PM2.79m | 8:14AM2.64m | 8:38PM2.57m | 9:09AM2.49m | 9:47PM2.39m | 10:35AM2.40m | 11:28PM2.32m | ||||||||
Low Tide | 11:28AM0.76m | 11:57PM0.76m | 12:06PM0.83m | 00:33AM0.89m | 12:44PM0.96m | 1:10AM1.05m | 1:24PM1.12m | 1:49AM1.22m | 2:08PM1.30m | 2:33AM1.39m | 3:02PM1.47m | 3:29AM1.54m | 4:14PM1.59m | ||||||||
 |  |  | | | | | | | | | | | | | | | | | | | |
 | 6:43 | — | — | 6:45 | — | — | 6:46 | — | — | 6:47 | — | — | 6:48 | — | — | 6:48 | — | — | 6:50 | — | — |
 | — | 8:32 | — | — | 8:31 | — | — | 8:30 | — | — | 8:29 | — | — | 8:28 | — | — | 8:25 | — | — | 8:24 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 21 | 21 | 21 | 25 | 24 | 25 | 29 | 26 | 23 | 25 | 22 | 22 | 21 | 22 | 21 | 20 | 19 | 19 | 19 | 19 | 19 |
Feels °C | 21 | 20 | 22 | 22 | 22 | 25 | 26 | 26 | 25 | 23 | 22 | 24 | 21 | 22 | 21 | 21 | 15 | 14 | 14 | 13 | 14 |
Swell 1 Height (m) Direction Period (s) | NW 8 | NW 8 | NNW 8 | NNW 8 | W 17 | SW 16 | NNW 8 | W 9 | NNW 8 | NNW 8 | NNW 8 | NNW 8 | NNW 7 | NNW 6 | WNW 9 | NW 8 | SW 13 | SW 16 | NNW 11 | SW 15 | SW 14 |
| kJ | 440 | 527 | 809 | 318 | 6 | 10 | 274 | 6 | 192 | 119 | 103 | 52 | 37 | 12 | 50 | 427 | 7 | 9 | 215 | 8 | 8 |
Swell 2 Height (m) Direction Period (s) | — | — | — | W 8 | — | W 17 | W 8 | SW 15 | WNW 8 | WNW 8 | WNW 8 | WNW 8 | WNW 8 | WNW 10 | NW 5 | SW 13 | SW 16 | — | W 9 | SW 12 | SW 14 |
| kJ | — | — | — | 1 | — | 5 | 1 | 9 | 7 | 6 | 6 | 7 | 12 | 34 | 13 | 7 | 10 | — | 14 | 6 | 8 |
Swell 3 Height (m) Direction Period (s) | — | — | — | SW 17 | — | — | SW 15 | W 9 | SW 16 | SW 16 | SW 16 | SW 15 | SW 14 | NNW 7 | NNW 6 | NW 11 | — | — | SW 15 | — | — |
| kJ | — | — | — | 11 | — | — | 9 | 2 | 11 | 10 | 10 | 9 | 8 | 9 | 4 | 5 | — | — | 9 | — | — |
Wind waves Height (m) Direction Period (s) | — | — | — | — | NNW 8 | NNW 8 | — | NNW 8 | — | SSE 3 | SW 4 | SW 4 | SW 3 | SSW 3 | — | — | NNW 8 | NNW 8 | NNW 7 | NNW 7 | NNW 8 |
| kJ | — | — | — | — | 213 | 302 | — | 161 | — | 3 | 11 | 3 | 3 | 1 | — | — | 730 | 1040 | 456 | 565 | 857 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 32 | 398 | 0 | 0 | 315 | 32 | 0 | 499 | 0 | 5 | 268 | 8 | 34 | 212 | 52 | 52 | 369 | 238 | 356 | 413 | 76 |
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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