Surf Forecasts:
Costa Nova surf forecast from 10 Aug 2026:
- Best quality surf: Wednesday 12 Aug, 4AM (local time) - 2.5ft (0.8m), 9s period, WNW swell with glassy winds.
- Most powerful swell: Saturday 15 Aug, 10AM (local time) - 5ft (1.6m), 8s period, NW swell with 346 kJ wave energy.
- Next surfable swell (1★+): Monday 10 Aug, 4AM (local time) - 2ft (0.6m), 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 Monday (Aug 10) at 4AM. The primary swell is predicted to be 0.6m and 9s period with a secondary swell of 0.7m and 7s. 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 1.6m 8s and forecast to arrive on Saturday (Aug 15) at 10AM. Winds are predicted to be glassy at the time the swell arrives.
| Wave Type | Time (WEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 4AM (Mon 10th Aug) | 2ft (0.6m) 9s |
| Best Surf | 4AM (Wed 12th Aug) | 2.5ft (0.8m) 9s |
| Most Powerful | 10AM (Sat 15th Aug) | 5ft (1.6m) 8s |
Table - best surf conditions forecast for Costa Nova over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let's have a look at what's cooking for the Costa Nova stretch over the next couple of weeks. It's a bit of a mixed bag, but there are some real gems if you pick your moments.
We're starting off pretty slow. Monday the 10th is a write-off, with poor surf and a messy onshore wind. Tuesday the 11th morning gives us the first glimpse of hope, but it’s nothing to write home about. There’s a gap of a few days of mostly mediocre conditions, so don’t rush out just yet.
The real action starts kicking off Thursday morning the 13th. We’ve got a nice pulse of waist-to-chest-high swell setting in, around 3ft from the west. The period is a solid 10 seconds, and there's some good energy behind it. But the best part? It’s clean. Glassy conditions, with a light offshore breeze from the SW. That’s a morning session you’ll want to get wet for.
Friday morning the 14th sees a similar story with glassy conditions early on, and a little more size on the afternoon push, but the wind swings onshore and kills it. The weekend though… now we’re talking. Saturday morning the 15th is looking like a standout. We’ve got a solid 5ft of NW swell, pushing into that punchy territory. The wind is dead calm, glassy as a mirror. This isn’t for beginners though (anything over 5ft starts getting real), but if you’re an intermediate or better, get the dawn patrol lined up.
Sunday morning the 16th is another cracker. Still that NW swell, a touch smaller at 4ft, but still solid and clean with a light offshore breeze. This is consistent, quality surf.
There is another promising window on Monday the 17th morning with a glassy 4ft, and then a bit of a lull. The next real bright spot is Friday morning the 21st of August. The swell is back to chest-high at 4ft from the NW, with a nice 10-second period. And you guessed it – another morning of clean, glassy conditions. This spot is delivering on the early starts.
Costa Nova is a beach and jetty setup, so the crowds can be around, but with the quality on offer on those morning windows, it’s worth it. The water temp is about what you’d expect for this time of year.
Keep your eyes on those mornings of the 13th, 14th, 15th, and 16th – those are the real standouts. The 21st is a good backup in the second week, but long-range calls are always a little less certain.
Stay stoked, catch you in the lineup.
Rusty
Short Range ForecastMostly dry. Warm (max 20°C on Sun night, min 17°C on Mon night). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 21°C on Sat morning, min 17°C on Thu night). Wind will be generally light. | ||||||||||||||||||||
Monday 10 | Tuesday 11 | Wednesday 12 | Thursday 13 | Friday 14 | Saturday 15 | Sunday 16 | |||||||||||||||
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 7 | NW 9 | NW 6 | NW 5 | W 10 | WNW 10 | W 10 | W 10 | W 10 | WNW 10 | NNW 6 | WNW 9 | NNW 7 | NNW 7 | NW 8 | NW 9 | NNW 8 | NNW 9 | NNW 8 | NNW 8 |
Wave Graph  | |||||||||||||||||||||
 kJ | 58 | 52 | 64 | 50 | 49 | 94 | 154 | 148 | 183 | 204 | 218 | 153 | 127 | 120 | 243 | 346 | 148 | 307 | 252 | 241 | 207 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-on | cross | glassy | cross-on | cross | cross-on | cross-on | cross | glassy | cross-on | glassy | glassy | cross-on | glassy | glassy | cross-on | cross-off | glassy | cross-on | cross |
High Tide | 2:23PM2.99m | 2:56AM2.93m | 3:13PM3.18m | 3:43AM3.06m | 3:58PM3.33m | 4:25AM3.14m | 4:40PM3.40m | 5:05AM3.17m | 5:20PM3.40m | 5:42AM3.13m | 5:58PM3.33m | 6:19AM3.05m | 6:35PM3.19m | ||||||||
Low Tide | 7:43AM1.19m | 8:23PM1.00m | 8:39AM1.04m | 9:15PM0.84m | 9:27AM0.89m | 10:00PM0.72m | 10:10AM0.79m | 10:41PM0.67m | 10:50AM0.74m | 11:20PM0.68m | 11:28AM0.76m | 11:57PM0.76m | 12:06PM0.83m | 00:33AM0.89m | |||||||
 | |  | | |  |  | | | | | | | | | | |  | | | | |
 | 6:39 | — | — | 6:39 | — | — | 6:41 | — | — | 6:41 | — | — | 6:43 | — | — | 6:43 | — | — | 6:45 | — | — |
 | — | 8:39 | — | — | 8:38 | — | — | 8:37 | — | — | 8:36 | — | — | 8:35 | — | — | 8:32 | — | — | 8:31 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | — | — | — |
Temp °C | 19 | 20 | 19 | 19 | 20 | 19 | 20 | 20 | 19 | 20 | 20 | 19 | 20 | 20 | 19 | 21 | 21 | 21 | 28 | 26 | 24 |
Feels °C | 19 | 19 | 19 | 21 | 19 | 19 | 22 | 21 | 20 | 20 | 19 | 20 | 20 | 20 | 21 | 20 | 21 | 23 | 27 | 24 | 24 |
Swell 1 Height (m) Direction Period (s) | NW 8 | NW 7 | NW 9 | NW 6 | NNW 11 | NW 6 | WNW 10 | W 10 | W 10 | W 10 | WNW 10 | WNW 9 | NNW 6 | WNW 9 | NNW 7 | NW 8 | NNW 8 | NNW 8 | NNW 9 | NNW 8 | NNW 8 |
| kJ | 58 | 52 | 64 | 50 | 45 | 69 | 154 | 148 | 183 | 204 | 218 | 153 | 103 | 111 | 243 | 346 | 120 | 307 | 252 | 241 | 207 |
Swell 2 Height (m) Direction Period (s) | W 7 | WSW 6 | W 6 | NW 12 | WNW 11 | W 10 | NW 6 | NNW 9 | NNW 9 | NW 6 | N 8 | WNW 9 | WNW 9 | WNW 11 | NW 8 | W 8 | NW 9 | W 8 | W 8 | W 8 | W 8 |
| kJ | 32 | 14 | 6 | 34 | 40 | 94 | 47 | 16 | 17 | 31 | 5 | 92 | 127 | 12 | 166 | 22 | 148 | 11 | 5 | 1 | 1 |
Swell 3 Height (m) Direction Period (s) | W 11 | W 11 | WNW 10 | NW 8 | WNW 9 | NNW 10 | NNW 9 | — | NW 9 | NNW 9 | — | — | — | — | — | W 8 | WNW 8 | — | W 17 | SW 17 | SW 16 |
| kJ | 2 | 2 | 10 | 17 | 8 | 36 | 32 | — | 3 | 7 | — | — | — | — | — | 12 | 21 | — | 5 | 11 | 10 |
Wind waves Height (m) Direction Period (s) | — | NW 3 | NNW 4 | — | NW 5 | — | — | NW 5 | NW 5 | — | NW 5 | NNW 6 | — | NNW 7 | — | — | — | — | — | — | — |
| kJ | — | 5 | 22 | — | 49 | — | — | 23 | 25 | — | 28 | 150 | — | 120 | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 52 | 222 | 81 | 0 | 218 | 40 | 34 | 218 | 52 | 0 | 132 | 0 | 0 | 132 | 0 | 0 | 376 | 0 | 0 | 147 | 34 |
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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